Heat Pump Service & Repair Plumber
Across Orpington & Kent.

If you own an Air Source Heat Pump in Orpington, Bromley, Sevenoaks or anywhere across South East London and Kent, an annual service isn't optional — it's essential. Yet many homeowners skip it, either because they don't know what's involved or because their original installer never explained the importance.

As a CIPHE-qualified heat pump engineer working on systems every day, I want to demystify exactly what a proper ASHP service includes, why it matters, and what happens when it's neglected.

Why Annual Heat Pump Servicing Is Non-Negotiable

An Air Source Heat Pump is a sophisticated piece of refrigeration engineering — closer to a sealed industrial unit than a domestic boiler. It runs continuously through the heating season, exposed to weather, debris and temperature extremes. Without annual servicing, three things happen:

• Efficiency drops sharply — typically 10–15% per year if coils aren't cleaned. That translates directly to higher electricity bills.
• Manufacturer warranties become invalid — Mitsubishi, Vaillant, Daikin and Samsung all require documented annual servicing by a qualified engineer to keep your multi-year warranty in force.
• Small faults become catastrophic ones — a £40 sensor replacement caught early prevents a £2,000 compressor failure later.

What's Actually Checked in a Proper ASHP Service

A genuine annual service should take 90 minutes to two hours. If your engineer is in and out in 20 minutes, they haven't done the work. Here's the checklist I work through on every visit:

1. External Unit Inspection & Clean

The outdoor unit — the part you see in your garden — pulls thousands of cubic metres of air through its heat exchanger every day. Leaves, pollen, spider webs, grass clippings and dust accumulate on the fins. I clean these thoroughly using a soft brush and proprietary coil cleaner. I also check fan blade balance, listen for bearing wear, and inspect the outer casing for damage from weather, animals or vandalism.

2. Refrigerant Pressure Verification

The refrigerant circuit is a sealed system, but pressures must be verified annually against the manufacturer's specification. Low pressure indicates a leak — which is both illegal under F-gas regulations if untreated and dangerously inefficient. High pressure suggests blocked airflow or a failing compressor. I check both high-side and low-side pressures and compare to expected values for the ambient temperature.

3. Electrical Connection Testing

Heat pumps draw significant current through their compressor and fan motors. I test all electrical terminations — at the unit, at the isolator, and at the consumer unit — for tightness and signs of arcing or burning. Loose connections are a fire risk and a common cause of intermittent fault codes.

4. Hydraulic System Checks

On the indoor side I check the heating circuit pressure, the expansion vessel charge, the inhibitor levels, and water quality. Sludge in the system kills heat pump efficiency faster than almost anything else. I'll also test the strainer/magnetic filter and clean it if needed.

5. Glycol & Antifreeze Concentration

This is one many cheap "services" skip. The glycol mix in your heat pump's external pipework prevents freezing in winter. Over time the concentration weakens through small losses. I test it with a refractometer — if the protection is below -10°C, your pipes could split during a cold Orpington winter, leading to a £3,000+ emergency repair.

6. Controls, Sensors & Calibration

Modern heat pumps rely on flow sensors, return temperature sensors, ambient sensors and pressure switches. A drifting sensor causes the system to underperform without throwing a fault code. I verify each one against actual measurements and recalibrate where the manufacturer permits it.

7. Performance Test

I run the system through a full operating cycle and measure the actual delivered heat versus electricity consumed — your real-world COP. If it's significantly below the manufacturer rating, something needs investigating before next winter.

8. Written Service Report

You receive a written record showing every check completed, all measured values, any recommendations, and the engineer's qualification number. This document is what your warranty provider will ask for if you ever need to claim.

Warning Signs Your Heat Pump Needs Attention Now

Don't wait for the next service if you notice any of these:

• Unusual noises — grinding, knocking or rattling that wasn't there before
• Ice build-up on the outdoor unit that doesn't clear during normal defrost cycles
• Rising electricity bills with no change in heating habits
• Lukewarm radiators when the system says it's running
• Frequent fault codes on the controller
• Water dripping from anywhere it shouldn't be

How Often, and What Should It Cost?

Once a year, ideally in autumn before the heavy heating season starts. Pricing varies depending on manufacturer, location and access, but a thorough service from a qualified engineer typically falls within a sensible range — and is dramatically cheaper than the repair you'll need without one. Be wary of suspiciously cheap services that don't include proper refrigerant checks or written documentation.

Megaflo and similar unvented hot water cylinders are excellent systems when properly maintained — they deliver mains-pressure hot water to every tap simultaneously, with no need for a loft tank. But when something goes wrong, they can be confusing, alarming, and occasionally dangerous if the problem isn't dealt with by a G3-qualified engineer.

As a G3-registered engineer servicing unvented cylinders across Orpington, Bromley, Sidcup, Sevenoaks and the wider Kent area, I see the same handful of issues come up again and again. Here are the seven most common — what they mean, what causes them, and what should be done.

1. Water Dripping from the Outside Discharge Pipe

What you see: A copper pipe coming out of an external wall, periodically dripping or running with hot water.

What it means: Either your temperature & pressure relief valve (TPRV) or your expansion relief valve has activated. Both are safety devices designed to release water if pressure or temperature exceeds safe limits.

The likely cause: Most often it's a failed expansion vessel. The vessel inside or alongside your cylinder loses its air charge over time, leaving nowhere for the heated water to expand into. Pressure rises, and the relief valve dumps water externally to keep things safe.

The fix: A G3 engineer will isolate the system, drain the expansion vessel, recharge it to the correct pre-charge pressure, and verify the relief valves are still functioning correctly. If the vessel itself has failed, it needs replacing.

2. No Hot Water at All

What you see: Cold water from hot taps, despite the boiler or heat pump appearing to be running.

What it means: Either the cylinder is being heated but heat isn't transferring, or it isn't being heated at all.

The likely causes:

• Failed immersion heater element (if used as backup or primary)
• Thermostat failure on the cylinder
• Programmer or timer not calling for hot water
• Two-port motorised valve stuck closed
• For ASHP-fed systems: heat pump fault preventing the system from heating the cylinder

The fix: Diagnosis starts with confirming the heat source is calling for hot water, then working backwards through the chain. This is genuinely engineering work — guessing wastes money on parts that aren't actually faulty.

3. Lukewarm Water That Never Gets Hot

What you see: Hot water arrives but isn't properly hot, or runs warm and then cold quickly.

The likely causes:

• Cylinder thermostat set too low (should be 60–65°C)
• Heat exchanger inside the cylinder is scaled (common in hard water areas like Orpington and Bromley)
• Failed thermostatic mixing valve at the outlet
• Cross-connection between hot and cold supplies somewhere in the property

The fix: A combined service of the cylinder and a check of the system controls usually identifies the issue quickly. Severe scaling may require descaling or eventual replacement.

4. Banging or "Kettling" Noises

What you see: Loud rumbling, banging or kettle-like noises from the cylinder when heating.

What it means: Almost always limescale build-up on the heating element or coil. Hard water across South East London and Kent makes this extremely common.

The fix: If caught early, descaling can extend the cylinder's life. Severe scaling damages internal components and may require replacement of the heat exchanger or the whole cylinder. This is exactly why annual servicing matters — I catch scale build-up long before it gets to the noisy stage.

5. Pressure Drops in Hot Water

What you see: Strong cold water pressure but weak hot water flow.

The likely causes:

• Partially closed isolation valve on the cylinder feed
• Scaled or blocked outlet pipework
• Failed pressure-reducing valve at the mains
• TMV (thermostatic mixing valve) cartridge blocked with scale

The fix: A pressure test at the cylinder identifies whether the problem is upstream or downstream. Replacement of scaled valves usually restores normal flow.

6. Visible Leaks Around the Cylinder

What you see: Water on the floor near the cylinder, on the airing cupboard floor, or stains on the ceiling below.

The likely causes:

• Failed seal on the immersion heater
• Corrosion at a connection point
• Pinhole leak in the cylinder itself (terminal — usually requires replacement)
• Failed expansion vessel diaphragm leaking water

The fix: Don't ignore any leak from an unvented cylinder. The system holds significant pressure and a small leak can become catastrophic. Isolate the supply and call a G3 engineer immediately.

7. Cylinder Tripping the Electrics

What you see: RCD or MCB tripping when the immersion heater operates.

What it means: The immersion element has failed, usually with the resistance wire shorting to the casing through scale or corrosion.

The fix: The element needs isolating, testing and replacing. While doing this it's the perfect opportunity to inspect the cylinder for early signs of internal corrosion.

How to Avoid These Problems in the First Place

Almost every issue I've listed can be caught early — or prevented entirely — by an annual G3 service. The service includes recharging the expansion vessel, testing the relief valves, checking the thermostat operation, inspecting all connections and providing a written record for your warranty.

If your cylinder hasn't been serviced in over 12 months, book one. It's far cheaper than the repair bill when something fails.

Should you keep your gas boiler, or switch to a heat pump? It's the question I get asked more than any other by homeowners across Orpington, Bromley, Sevenoaks and the wider Kent area. There's a lot of marketing noise out there — both for and against — and the honest answer depends entirely on your specific home.

This guide cuts through the spin and gives you the real numbers, from someone who actually services these systems day-to-day. I don't install heat pumps myself, so I have no commercial interest in pushing one option over the other.

The Headline Numbers (Don't Trust These Alone)

You'll see eye-catching claims in the press: "Heat pumps are 4× more efficient than gas boilers!" That's true on paper. A heat pump's COP (Coefficient of Performance) is typically 3–4, meaning it produces 3–4kWh of heat for every 1kWh of electricity it uses. A modern gas boiler is around 90% efficient.

But efficiency isn't the whole story — fuel cost matters more.

• Gas: roughly 6–7p per kWh in 2026
• Electricity: roughly 27p per kWh on a standard tariff

Quick maths: a gas boiler at 90% efficiency costs around 7.5p per usable kWh of heat. A heat pump at COP 3.5 costs around 7.7p per usable kWh. Almost identical on paper.

What Actually Determines Whether a Heat Pump Saves You Money

1. Your Home's Insulation

Heat pumps work best with a steady, lower-temperature heat output (typically 40–50°C flow temperature versus 70°C+ for a boiler). That requires a home that holds heat well. Modern homes built post-2000 are usually fine. Solid-wall Victorian properties without insulation upgrades will struggle and cost more to run.

The honest truth: If your home has poor loft insulation, no cavity wall insulation, and single-glazed windows, fix those first. They'll do more for your bills than any heating system change.

2. Radiator Sizing

Boiler radiators are sized for high flow temperatures. Heat pumps need larger radiators or underfloor heating to deliver the same heat at lower temperatures. Many heat pump installations include radiator upgrades — budget for this if you're getting quotes.

3. Your Electricity Tariff

The single biggest factor most people miss. Standard tariff at 27p/kWh makes heat pumps marginal. A dedicated heat pump tariff with cheaper overnight or off-peak rates can drop your effective electricity cost to 15–20p/kWh, transforming the maths.

4. Hot Water Usage

Heat pumps heat water to lower temperatures than boilers. If you have a large family with high hot water demand, you may need a larger cylinder or different operating pattern.

Real-World Examples from Local Homes

Example 1: 1990s Detached in Petts Wood

Well-insulated, modernised radiators, dedicated heat pump tariff. Previous gas annual cost: roughly £1,800. Heat pump annual cost: roughly £1,250. Saving: ~£550/year. Combined with the £7,500 BUS grant, payback on the additional install cost works out to around 7–9 years.

Example 2: 1930s Semi in Bromley

Cavity wall and loft insulation done, original radiators. Previous gas annual cost: roughly £1,500. Heat pump annual cost: roughly £1,650. Loss: ~£150/year. Without radiator upgrades, the system can't deliver heat efficiently. Recommendation was to delay installation until insulation work was completed.

Example 3: New-Build in Sevenoaks (Underfloor Heating)

Fully insulated to current building regs, underfloor heating throughout. Previous gas annual cost: roughly £1,200. Heat pump annual cost: roughly £700. Saving: ~£500/year. Underfloor heating is the perfect partner for a heat pump.

What the £7,500 BUS Grant Actually Covers

The Boiler Upgrade Scheme (BUS) provides £7,500 towards the cost of a qualifying ASHP installation. A few things to know:

• Must be installed by an MCS-certified installer
• You don't claim it — the installer claims and discounts your invoice
• Typical full ASHP install runs £12,000–£18,000 depending on system size and radiator/cylinder upgrades needed — so the grant typically covers 40–60% of cost
• Property must have a current EPC with no outstanding insulation recommendations

When a Heat Pump Genuinely Makes Sense

Based on what I see in real homes:

• Modern, well-insulated property (post-2000 build, or older with insulation done)
• Existing oversized or modern radiators, or underfloor heating
• Willingness to switch to a heat pump electricity tariff
• Boiler is approaching end of life anyway (10+ years old)
• You value future-proofing your home (gas boilers will be phased out of new builds)
• Long-term ownership planned (10+ years to recover the investment)

When It Doesn't Make Sense (Yet)

• Solid-wall property with no insulation
• Existing boiler is recent and performing well
• Short-term ownership planned
• Original small radiators throughout
• Reluctance to monitor or switch electricity tariffs

The Honest Recommendation

For most homes I see in our area, a heat pump can save money — but only if everything else is right first. If you're in any doubt, get a heat loss survey done by an MCS installer (they're often free), make sure your insulation is sorted, and look hard at your electricity tariff before committing.

And once your heat pump is installed, get it serviced every year. It's the single biggest factor in whether you actually achieve the running cost savings the manufacturer promises.

Unvented hot water cylinders are workhorses. The Megaflo, Gledhill StainlessLite, Telford Tempest and Vaillant uniSTOR units I service every week across Orpington, Bromley and Kent are reliable, efficient pieces of kit — but they don't last forever.

One of the most common questions I get asked is: "How long should my unvented cylinder last, and when should I be thinking about replacement rather than repair?" Here's the honest answer based on real cylinders I see in real homes.

Typical Lifespan of an Unvented Cylinder

A well-maintained, good-quality unvented cylinder should give you between 15 and 25 years of reliable service. The variation is huge because lifespan depends almost entirely on three things:

• Water quality — hard water across South East London and Kent is the single biggest factor in cylinder lifespan
• Servicing history — cylinders serviced annually last roughly 50% longer than those left to fend for themselves
• Build quality — premium brands (Megaflo Eco Plus, Gledhill StainlessLite Plus) typically outlast budget alternatives by 5–10 years

The Three Stages of an Unvented Cylinder's Life

Years 1–10: The Reliable Years

During the first decade, a properly installed cylinder needs little more than annual servicing. Common jobs at this stage:

• Recharging the expansion vessel
• Testing the temperature & pressure relief valve (TPRV)
• Replacing the immersion heater element if used regularly
• Cleaning strainers and inspecting the discharge pipework

If you're paying for an annual service, this is the era where it pays back the most — preventing the small problems that, neglected, become big problems later.

Years 10–18: The Repair Era

This is when components start needing replacement. Common repairs at this stage:

• Expansion vessel replacement — the rubber diaphragm fails and the vessel won't hold its charge
• TPRV replacement — these valves are typically rated for 10–15 years
• Pressure-reducing valve replacement — scale damage is the usual cause
• Thermostat or thermostatic mixing valve replacement
• Limescale-related issues on the heat exchanger

None of these on their own justify replacing the whole cylinder — they're all sensible repairs with affordable parts. The cylinder body itself is still good for many more years.

Years 18+: Decision Time

Once a cylinder approaches 20 years, the maths changes. The cylinder body itself starts to show its age — internal corrosion, weld fatigue, deteriorated insulation, and increasingly frequent component failures. At this point I'm honest with customers: keep paying for repairs, or invest in a new cylinder that'll last another 20 years.

Warning Signs Your Cylinder Is Approaching End of Life

Look out for these — any one of them is worth investigating, multiple together suggests replacement:

• Visible rust streaks on the cylinder body or insulation
• Persistent leaks that come back after repair
• Frequent TPRV discharges even after expansion vessel servicing
• Reducing hot water capacity — runs out faster than it used to
• Heating times getting longer despite proper servicing
• Multiple components failing within 12 months of each other
• Cylinder no longer meeting current Building Regulations

Repair vs Replace: How to Decide

My rule of thumb: if the cost of the proposed repair is more than 40% of the cost of replacement, and the cylinder is over 15 years old, replacement is usually the better long-term value. You're paying for old technology with limited life left.

However, for younger cylinders (under 15 years) almost all faults are economically repairable. A failed expansion vessel, blown TPRV, or even a complete control gear replacement is far cheaper than a new cylinder.

What's Involved in Replacing an Unvented Cylinder

A like-for-like replacement of a domestic unvented cylinder is typically a one-day job for a G3-qualified engineer. The work includes:

1. Isolating water and electrical supplies
2. Draining the existing cylinder
3. Disconnecting and removing the old unit
4. Installing the new cylinder including all required safety devices
5. Reconnecting hot/cold supplies, expansion vessel, immersion heater
6. Pressurising, testing and commissioning
7. Issuing your G3 Building Regulations certificate

The new cylinder will come with a manufacturer warranty (typically 2–10 years on the cylinder body, 1–2 years on parts). Provided it's serviced annually, you should expect another 20+ years of reliable hot water.

Choosing a Replacement Cylinder

If you're replacing, this is the time to think strategically:

• Stick with the same size? Family changed? You may need bigger or smaller.
• Heat pump compatible? If you're considering a future heat pump, a cylinder with a larger heat exchanger coil is essential.
• Premium or budget? Pay extra for the premium model — the price difference is small relative to the lifespan difference.

I usually recommend Megaflo Eco Plus or Gledhill StainlessLite Plus as well-proven options, but the right choice depends on your specific setup, water pressure and future plans.

You turn on the hot tap and out comes a sad trickle. Cold water is flowing fine. Yesterday everything worked. Today, hot water pressure has collapsed. Sound familiar?

Pressure problems are one of the most common unvented cylinder issues I see across Orpington, Bromley, Sidcup and the wider Kent area. The good news: most are fixable, often without replacing the cylinder. The bad news: diagnosing the actual cause requires a methodical approach, because the symptoms can have many possible roots.

How an Unvented Cylinder Delivers Pressure

Understanding the system helps you understand what can go wrong. An unvented cylinder takes water from your incoming mains supply, heats it, and stores it under pressure ready for use. The pressure at your hot tap is essentially the same pressure that came in from the street, minus losses along the way.

That means hot water pressure depends on:

• Your incoming mains pressure
• The pressure-reducing valve (PRV) setting on the cylinder cold feed
• Any restrictions in the cold feed pipework
• The internal cylinder hot outlet condition
• The hot supply pipework itself
• Any thermostatic mixing valves (TMVs) on the route
• The tap or shower outlet itself

The Most Common Causes (In Order)

1. Failed or Wrongly Set Pressure-Reducing Valve (PRV)

The PRV reduces your incoming mains pressure to a safe level for the cylinder (typically 3 bar). When it fails or drifts out of calibration, it can over-restrict flow — causing exactly the "weak hot, strong cold" symptom you're seeing.

How a G3 engineer checks: Pressure gauge testing on both the inlet and outlet of the PRV, comparing readings to manufacturer specification. Replacement is usually a 30-minute job once the system is isolated.

2. Scaled Internal Heat Exchanger

In hard water areas like Orpington, Bromley and Sevenoaks, scale builds up over years on the internal heat exchanger coil. This restricts hot water flow through the cylinder. Eventually it can become severe enough to drop pressure noticeably.

How to spot it: Pressure has dropped gradually over years, often combined with longer heat-up times and audible kettling noises during heating. A fully scaled cylinder usually means replacement, but partial scaling can sometimes be addressed.

3. Thermostatic Mixing Valve (TMV) Cartridge Blocked

If the pressure problem is at one specific tap or shower (not all hot taps), a TMV is often the culprit. These valves blend hot and cold to prevent scalding, and their internal cartridges scale up and clog over time.

How to spot it: Pressure is fine at most outlets but reduced at the bath, shower, or basin with TMV. Replacement cartridges are inexpensive and quick to fit.

4. Partially Closed Service Valves

Sometimes the simplest explanation is the right one. Service valves on the cold feed to the cylinder, on the hot outlet, or at individual fixtures may have been partially closed during recent work and never fully reopened.

How to check: A G3 engineer will systematically work through every valve on the route. It's surprisingly common — and embarrassing for whoever last worked on the system.

5. Failed Expansion Vessel Affecting System Pressure

A failed expansion vessel doesn't directly cause low pressure, but it does cause erratic system pressure. You may notice pressure dropping then recovering, or pressure differing day to day. Signs include water dripping from the external discharge pipe and audible water hammer when taps close.

6. Blocked or Failed Strainers

Most unvented cylinders have a strainer in the cold feed designed to catch debris. Over years it can become almost completely blocked, dramatically reducing hot water pressure. Easy fix once diagnosed.

7. Internal Cylinder Corrosion

On older cylinders (15+ years), internal corrosion can affect the hot outlet specifically. This is rarer and usually means the cylinder is approaching end of life.

8. Incoming Mains Pressure Dropped

Sometimes the cylinder isn't the problem at all. Your incoming mains pressure may have dropped due to:

• Water company supply changes
• A leak elsewhere on your property
• A failing stop tap that's partially closed
• An issue with a property-level pressure-reducing valve

What to Try Yourself First

Before calling an engineer, three things are worth checking:

1. Run the cold tap from the kitchen sink — this is usually directly off the mains. If cold pressure is also weak there, the problem is incoming supply, not the cylinder.
2. Check tap aerators and shower heads — unscrew, soak in vinegar overnight, refit. Limescale at the outlet itself is the easiest fix possible.
3. Test all hot taps — if the problem is only at one outlet, the issue is local (TMV, partial isolation valve, pipework). If everywhere, it's likely the cylinder, PRV or main supply.

Why a Proper Diagnosis Matters

The reason I always work methodically through this list is that the symptoms can look identical regardless of cause. Replacing a PRV when the actual issue is scale build-up wastes money. Descaling a cylinder when the problem is a blocked strainer is unnecessary work. A G3 engineer with proper test equipment can identify the actual cause in under an hour.

A hidden water leak is one of the most stressful problems a homeowner can face. You know something's wrong — the water bill keeps creeping up, or there's an unexplained damp patch — but you can't see where it's coming from. Left undetected, hidden leaks cause thousands of pounds in damage, drive up energy bills (if it's a heating leak), and can compromise your property's structure.

The good news: most hidden leaks can be tracked down using a methodical approach, often without expensive equipment or destructive investigation. Here's how I do it on jobs across Orpington, Bromley, Sevenoaks and the wider Kent region.

The Warning Signs You Have a Hidden Leak

Many people don't realise they have a leak until significant damage is already done. Watch for:

• Unexplained increase in water bills — even a small consistent leak adds up fast
• Damp patches on walls, ceilings or floors with no obvious cause
• The sound of running water when no taps are open
• Mould or mildew appearing in unusual locations
• Warm spots on floors (suggests a hot water pipe leak)
• Pressure drop in your heating system requiring frequent topping up
• Loose or stained tiles, lifting laminate flooring
• Musty smells in cupboards or under stairs
• Heating bills suddenly higher with no obvious cause

Step 1: Confirm a Leak Actually Exists

Before tearing up floors, confirm you actually have a leak. Two simple tests:

The water meter test: If you have a water meter, turn off every tap and water-using appliance in the house. Make a note of the meter reading. Wait 30 minutes without using any water. Re-read the meter. Any change indicates a leak somewhere on your property.

The stopcock test: Turn off your internal stopcock (usually under the kitchen sink). If the meter still ticks over, the leak is between the meter and your stopcock — typically your incoming service pipe. If it stops, the leak is inside your property.

Step 2: Narrow It Down — Hot or Cold?

Feel around damp areas. If the area feels warm, the leak is on a hot water pipe (heating circuit or hot supply). Cold patches indicate a cold supply leak. This dramatically narrows where you need to look.

For heating system leaks specifically, watch the boiler/heat pump pressure gauge. If you're regularly topping it up to maintain pressure, you have a leak somewhere in the heating circuit — often under floorboards.

Step 3: Listen Carefully

In a quiet house with all water uses off, walk slowly around with a glass tumbler held to your ear. Listen against walls, near pipework, and against floors. Running water has a distinctive sound that travels through structure.

Professional plumbers use a stethoscope or acoustic listening device for this — but a glass works surprisingly well for detecting major leaks.

Step 4: Check the Usual Suspects

Bathroom areas

Most hidden leaks start under bathroom fittings. Check around:

• Bath taps and the bath waste trap
• Toilet base and the connection between the cistern and pan
• Behind washing machines (the inlet hose connection)
• Shower trays and shower waste
• Basin pedestals (slow leaks often go unnoticed for years)

Kitchen areas

• Behind dishwashers and washing machines
• Under the sink — flexible hose connections fail surprisingly often
• Around fridge/freezer ice maker connections

Heating pipework

Heating leaks under floorboards are particularly tricky. Look for staining on ceilings of rooms below, lifting flooring, or warm patches on floors. Pressure loss in the boiler/heat pump system is the most reliable indicator.

External and underground

A particularly green or wet patch in the garden, especially over the route of your incoming water pipe, suggests an external supply leak. These need urgent attention as they're invisible until they cause real damage.

Step 5: When to Call a Professional

If you've followed the above and still can't locate the leak, a professional with proper leak detection equipment can find what you can't. Tools like:

• Thermal imaging cameras — show heat differentials through walls and floors
• Acoustic detectors — amplify the sound of water under pressure
• Tracer gas — for very small or pressurised leaks
• Moisture meters — confirm whether suspect areas are actually wet

A professional leak detection job typically pays for itself many times over by avoiding unnecessary destructive investigation.

What NOT to Do

• Don't ignore small damp patches — they always get worse, never better
• Don't tear up flooring on a hunch — locate the leak first
• Don't assume it'll dry out — active leaks don't dry, they accumulate
• Don't put off the call — water damage compounds quickly

Insurance Implications

Buildings insurance typically covers the damage caused by a leak but not the repair of the leak itself. The longer you leave a leak, the more likely your insurer will argue you contributed to the damage. Document the issue with photos as soon as you spot it, and call an engineer promptly.

A weak shower, taps that take forever to fill a kettle, washing machines that spend an age trying to fill — low water pressure is one of the most common plumbing complaints I get called out for across Orpington, Bromley and the wider Kent region.

The frustrating part is that "low pressure" can have eight or more genuinely different causes, and the right fix depends entirely on which one you've got. Here's a complete plumber's guide to diagnosing and fixing the issue.

First Things First: Pressure vs Flow

Before diving in, it helps to understand the difference. Pressure is the force pushing the water (measured in bar). Flow is the volume of water actually arriving (measured in litres per minute). They're related but not the same — you can have high pressure with low flow if there's a restriction somewhere, or vice versa.

What you experience as "low pressure" is usually a combination of both. The fix depends on which is actually limiting you.

1. Mains Supply Issue from the Water Company

Sometimes the problem isn't your property at all. If your whole street has dropped pressure, your local water company is the place to start.

How to check: Ask neighbours. If they're affected too, call your water company. If only your property is affected, the problem is on your side of the boundary.

The fix: If the water company has a known problem, it's their job to fix it. If your incoming pressure is consistently lower than the regional standard, you can request they investigate.

2. Partially Closed Stop Tap

The most embarrassingly simple cause. Your internal stopcock (usually under the kitchen sink) restricts incoming flow if not fully open. Many older stop taps gradually seize up part-closed.

How to check: Locate the internal stopcock and confirm it's fully anti-clockwise (open). Then locate the external stopcock (usually a small cover near your property boundary) and check that's fully open too.

The fix: Open both. If the stop tap is seized, it may need replacing — a quick job for a plumber.

3. Limescale Build-Up at Outlets

In hard water areas across Kent and South East London, limescale is the biggest single cause of localised pressure loss. It builds up at every restriction in your plumbing — tap aerators, shower heads, mixer valves, isolation valves.

How to check: Compare flow at different taps. If one specific tap or shower is dramatically worse than others, the problem is local to that outlet.

The fix: Unscrew the aerator from the tap end, soak it in white vinegar overnight, refit. For shower heads, descale the same way. This single step often restores 90% of lost pressure on individual outlets.

4. Failed or Drifted Pressure-Reducing Valve (PRV)

Many properties have a PRV at the incoming mains to protect plumbing from excessive pressure. Over time these can fail, drift out of calibration, or become blocked with debris — restricting flow when they shouldn't.

How to check: A pressure gauge fitted before and after the PRV will show whether it's restricting flow appropriately. This is a job for a plumber with proper test equipment.

The fix: Replace or recalibrate. A direct replacement is typically a 30–60 minute job.

5. Blocked Filters or Strainers

Many fittings include small mesh strainers — at the inlet to washing machines, dishwashers, behind isolation valves to bathroom suites, and within combi boilers. These catch debris and gradually clog over years.

How to check: If pressure problems started after recent works on the water mains in your area (which often dislodge debris), or after years of slow degradation, blocked strainers are likely.

The fix: Clean or replace. Most are easily accessible once you know where to look.

6. Old Galvanised Steel Pipework

If your property has its original 1930s–1960s galvanised steel pipework still in place, internal corrosion gradually narrows the bore. Eventually flow drops dramatically — sometimes a 22mm pipe might be effectively 8mm internally.

How to check: Cut into a section during another plumbing job (or visible exposed pipework in cellars) — internal corrosion is unmistakable.

The fix: Replacement of affected sections, or full re-piping in copper or plastic. This is a significant job but the difference in performance is dramatic.

7. Hidden Leak Reducing System Pressure

A significant leak somewhere in your plumbing can drop available pressure throughout the property. Particularly common with leaks on incoming supply pipes (between the meter and your stop tap) which can be invisible while reducing flow significantly.

How to check: See my separate article on detecting hidden leaks. The water meter test is the quickest way to confirm or rule this out.

The fix: Locate and repair the leak. Once fixed, pressure typically returns to normal.

8. Mains Pressure Genuinely Too Low for Your Demands

Some properties simply don't have enough incoming pressure to support modern fittings. A property with 1 bar of mains pressure feeding multi-head shower systems will always disappoint, regardless of what plumbing you fit.

How to check: A direct mains pressure measurement at your stop tap. Anything below 1.5 bar is genuinely low.

The fix: Options include installing a mains booster pump, switching to an unvented hot water system that boosts pressure, or fitting an accumulator tank.

How to Diagnose Your Specific Problem

Work through this checklist:

1. Is the problem at all outlets or just some? (All = mains side; some = local)
2. Is it cold, hot, or both? (Helps locate the problem area)
3. Has it been gradual or sudden? (Sudden = something specific failed; gradual = scale or corrosion)
4. Is the kitchen cold tap (usually direct from mains) affected? (Yes = mains issue)
5. Are neighbours affected? (Yes = water company issue)

When to Call a Plumber

If basic diagnosis (descaling outlets, checking stop taps) doesn't fix it, a plumber with pressure gauges and flow meters can identify the exact cause quickly. The fix is usually straightforward once the cause is known — the diagnosis is the skill.

The Boiler Upgrade Scheme (BUS) is the single biggest financial incentive available to UK homeowners switching to renewable heating. With £7,500 off the cost of an Air Source Heat Pump installation, it's transformed the maths for thousands of households across South East London and Kent. But the scheme is also widely misunderstood — and a surprising number of homeowners get rejected on technicalities that could have been avoided.

I service heat pumps across Orpington, Bromley, Sevenoaks and the wider Kent region every week, and I've seen first-hand which BUS applications go smoothly and which run into trouble. Here's a clear, no-nonsense guide to getting your grant approved in 2026.

What Is the Boiler Upgrade Scheme?

BUS is a UK government scheme administered by Ofgem. It provides one-off grants to homeowners and small landlords to help replace fossil-fuel heating systems with renewable alternatives:

• £7,500 for an Air Source Heat Pump
• £7,500 for a Ground Source Heat Pump
• £5,000 for a Biomass boiler (in rural areas only)

The scheme has been confirmed to run until at least 2028 with a £1.5 billion budget allocation, so there's no urgency-induced rush — but the grants are first-come, first-served within the annual budget.

Are You Eligible?

Eligibility comes down to several specific criteria. To qualify in 2026 you need:

1. The Right Property

• Property in England or Wales (Scotland has its own equivalent scheme)
• Domestic property (your home, or a small landlord's property)
• Owner of the property OR have permission from the owner
• Property must have a current Energy Performance Certificate (EPC)

2. A Valid EPC

Your EPC must be less than 10 years old AND must have no outstanding insulation recommendations for loft insulation or cavity wall insulation. This catches more applications out than anything else.

If your EPC says you should have loft insulation but you don't, you'll need to install it before applying. Same for cavity wall insulation. The good news: a new EPC after the upgrades is straightforward to arrange.

3. The Right Installer

Your installer must be MCS (Microgeneration Certification Scheme) certified specifically for heat pump installation. This is non-negotiable — the grant simply isn't available through non-MCS installers.

Honest note: Smith EcoFlow doesn't install heat pumps. We service and repair them. So for a new installation, you'll need to find an MCS installer separately. Once installed, we can keep your system serviced and running for years to come.

4. The Right System

• The heat pump must replace a fossil-fuel boiler (gas, oil, LPG)
• It must be sized correctly via a heat loss calculation
• It must be the primary heating source, not supplementary
• The installation must comply with MCS standards

What the £7,500 Actually Covers

The grant is a flat £7,500 regardless of installation cost. A typical Air Source Heat Pump installation in 2026 costs £12,000–£18,000 depending on:

• System size (kW rating needed for your property)
• Whether you need cylinder upgrades (existing cylinders rarely work)
• Whether you need radiator upgrades (about half of installs do)
• Pipework modifications
• Electrical supply upgrades
• Outdoor unit positioning and noise considerations

So for most homes the grant covers 40–60% of total cost. Your out-of-pocket spend after the grant typically lands between £5,000 and £10,500.

The Application Process — Step by Step

Step 1: Get an MCS-Certified Installer to Quote

Get at least 2–3 quotes. Pricing varies significantly. The installer will visit, do a heat loss survey, and produce a detailed quote.

Step 2: Confirm Your EPC

Find your current EPC at gov.uk/find-energy-certificate. Check it's under 10 years old and has no outstanding insulation recommendations.

Step 3: Sign the Installer's Quote

Once you sign, the installer applies for your BUS voucher. This typically takes 2–3 weeks for approval.

Step 4: Installation

Once the voucher is approved, installation takes 3–5 days. The installer manages all paperwork.

Step 5: Final Paperwork

The installer claims the £7,500 from Ofgem after completion and discounts it from your final invoice.

The Most Common Reasons Applications Get Rejected

Based on applications I've seen go wrong:

1. EPC out of date — over 10 years old. Solution: get a new EPC done.
2. EPC shows outstanding insulation work — fix the insulation first.
3. Installer not MCS certified — always check before signing anything.
4. Heat pump replacing electric heating — the scheme requires replacing fossil fuel.
5. Listed building issues — sometimes solvable, but adds significant complication.
6. Insufficient electrical supply — most homes are fine, but some need supply upgrades first.

Should You Wait or Act Now?

The scheme runs until at least 2028 with confirmed funding. There's no need to rush, but two things to consider:

• Energy prices are volatile — the case for renewable heating gets stronger when gas prices spike
• The grant amount has gone up recently (it was £5,000 originally) — there's no guarantee it stays at £7,500 forever

If your boiler is ageing (10+ years old) and you're already considering a replacement, the grant makes the heat pump option financially competitive. If your boiler is recent, there's no rush.

After Installation: Don't Forget the Servicing

Once your new heat pump is installed and commissioned, the installer's job is largely done. From that point, ongoing servicing is essential to keep your manufacturer warranty valid and your system running efficiently. That's where Smith EcoFlow comes in.

If there's one combination that genuinely transforms how a home feels to live in, it's an Air Source Heat Pump paired with underfloor heating. Walk into a properly designed system on a January morning and the whole house is the same gentle, even warmth from floor to ceiling — no cold patches, no drying air, no clunking radiators.

I service plenty of these systems across Orpington, Bromley, Sevenoaks and surrounding Kent areas. When they're well-designed and properly maintained, customers love them. When they're not, they're disappointing and expensive to run. Here's what makes the difference.

Why Underfloor Heating Pairs So Well with a Heat Pump

The fundamental issue with heat pumps is that they're most efficient when running at lower flow temperatures. A gas boiler can comfortably push out 70°C+ flow temperatures to keep small radiators hot. A heat pump runs best at 35–45°C. That's still warm enough to heat your home — but only if your emitter (radiator or underfloor heating) is large enough to deliver the necessary heat at that lower temperature.

Underfloor heating is essentially a giant low-temperature emitter spread across your entire floor area. It's the perfect partner for a heat pump because:

• Huge surface area — your whole floor radiates heat, not just a small radiator
• Low operating temperature — designed to run at 30–40°C, ideal for heat pumps
• Even heat distribution — no hot/cold zones
• No visual intrusion — frees walls of radiators
• Higher COP — heat pumps are 15–20% more efficient at lower flow temperatures

New Build vs Retrofit: A Different Conversation

New Build & Major Renovations

If you're building from scratch or undertaking a major renovation, underfloor heating is a no-brainer. The pipework gets buried in the screed before the floor finish goes down. Heat output is excellent because there's nothing between the pipes and the room. Cost is typically £40–£70/m² installed.

Retrofitting Underfloor Heating

This is harder but increasingly common. Three main approaches:

• Floor lift & relay — Original floor comes up, screed and pipes go in, new floor goes down. Best heat output but most disruption. Practical for rooms being renovated anyway.
• Low-profile overlay systems — Specialist 18–25mm panels with grooves for pipework. Floor finish goes on top. Adds height (need to consider doors) but less disruptive.
• Underfloor systems for suspended timber floors — Pipes are clipped to the underside of upstairs floors with insulation below. Reduced output but works well in some properties.

Hybrid Systems: Underfloor Downstairs, Radiators Upstairs

This is what I see most often in retrofit installations. The thermal mass of underfloor heating works brilliantly downstairs where you spend most time. Upstairs gets larger radiators sized for low-temperature operation. The whole system runs on the same heat pump with two zones.

The benefits: half the disruption of a full retrofit, same efficiency benefits, and bedrooms heat up faster than they would with underfloor (which is what most people want — quick warmth in the morning, not slow build-up).

Common Mistakes That Wreck the System

1. Undersized Loops

Each loop in an underfloor system can only carry so much heat. Designers sometimes squeeze too few loops into a floor area, leaving cold spots and overworking the heat pump. Get the design right at the start — fixing it later means floor lifting.

2. No Insulation Below the Pipework

Pipes need rigid insulation below them to direct heat upwards. Skimp on this and 50% of your heat goes into heating the ground or downstairs ceiling.

3. Wrong Floor Coverings

Carpet over thick underlay can reduce heat output by 30–50%. Most LVT and engineered wood is fine. Solid hardwood needs a low-tog underlay. Tile and stone are perfect — highest output. If you've got plush carpets, the system has to work harder.

4. No Proper Zoning

A whole-house single-zone underfloor system is a disaster. You need at least 2–3 zones (downstairs/upstairs/upstairs-bedrooms) with individual thermostatic control. Otherwise you can't have a cool bedroom and warm living room.

5. Wrong Manifold Position

Manifolds (where all the loops meet) generate noise. Don't put them in airing cupboards next to bedrooms. Boot rooms, utility rooms, garages or basements are ideal locations.

Costs and Realistic Expectations

For a typical 4-bedroom house in Orpington or Bromley:

• New build with underfloor throughout: £8,000–£14,000 for the underfloor system, plus the heat pump installation
• Downstairs retrofit: £5,000–£9,000 for underfloor, plus radiator upgrades upstairs
• Full retrofit: £12,000–£20,000 — major project

The running costs are significantly lower than radiators-only systems — typically 20–30% saving on heating bills compared to radiators with the same heat pump.

Servicing Considerations for Underfloor Systems

Underfloor systems are extremely reliable but they need annual checks of:

• Manifold valve operation
• Actuator function on each zone
• System pressure (loops should hold pressure)
• Inhibitor levels in the loop water
• Strainer cleanliness
• Smart control integration with the heat pump

I check all of these as part of an ASHP service when the heat pump feeds underfloor heating. A small leak on a manifold can drop heat pump efficiency dramatically — early detection saves money.

Home air conditioning has gone from being a luxury to a near-necessity in many UK homes. Summer heatwaves are getting hotter and longer, and properties — especially newer ones with high glazing and good insulation — can become genuinely uncomfortable for weeks on end.

If you're considering AC for your home in Orpington, Bromley, Sevenoaks or anywhere across South East London and Kent, this guide covers everything you need to know — installation costs, running costs, regulations, and why annual servicing matters more than most people realise.

The Different Types of Home AC

1. Single-Split Systems

One outdoor unit connected to one indoor unit. Cools (and usually heats) one room. Most common type for retrofit installations in UK homes.

• Cost: £1,500–£3,000 supply & install
• Best for: Master bedroom, home office, single-room cooling

2. Multi-Split Systems

One larger outdoor unit connected to multiple indoor units (typically 2–5). Each room can be controlled independently.

• Cost: £4,000–£10,000 depending on number of indoor units
• Best for: Whole-house cooling without multiple outdoor units

3. VRF/VRV Systems

High-end multi-zone systems typically used in commercial buildings and very large homes. Significantly more sophisticated control.

• Cost: £8,000–£25,000+
• Best for: Larger homes (5+ bedrooms), small commercial buildings

4. Portable AC Units

Plug-in units with a flexible exhaust hose. Genuinely far less efficient than fixed installations and often disappointing in practice. Useful as a temporary solution but not a permanent answer.

Installation Costs in Real Terms

For a typical UK home in Orpington or Bromley, expect:

• One bedroom: £1,800–£2,500 supply & fit
• Two bedrooms (single multi-split): £3,500–£5,000
• Whole upstairs (3–4 indoor units): £6,000–£9,000
• Whole house: £10,000–£15,000

Costs vary based on:

• Cable run length from indoor to outdoor unit
• Whether walls need chasing for pipework
• Outdoor unit positioning (ground vs wall-mounted)
• Brand & specification (Mitsubishi and Daikin premium, others budget)
• Whether condensate drainage requires significant pipework

Running Costs: How Much Does It Actually Cost to Run?

Modern split-system AC is significantly more efficient than people expect. A typical 2.5kW bedroom unit running for 8 hours overnight uses around 3–6 units (kWh) of electricity. At 2026 electricity rates (~27p/kWh), that's roughly 80p–£1.60 per night.

For whole-house cooling running through a hot July day:

• Light use (evenings only): £1.50–£3.00/day
• Moderate use (afternoons + evenings): £4.00–£7.00/day
• Heavy use (all day): £8.00–£14.00/day

For a typical UK summer (perhaps 30 days of significant AC use), expect £100–£300 in running costs.

The Heating Bonus: Air Conditioning Is Also a Heat Pump

Modern AC systems are reverse-cycle — they can heat as well as cool. They work as small Air Source Heat Pumps. This means:

• Use for heating in shoulder seasons (autumn, spring) when you don't want full central heating on
• Excellent supplementary heating for rooms that struggle in winter
• 3–4× efficient than direct electric heating

Many of my customers find their AC saves them more on autumn/spring heating than it costs on summer cooling.

Why Annual Servicing of AC Is Non-Negotiable

This is where most homeowners get caught out. AC systems are complex pieces of refrigeration engineering. They need annual servicing for the same reasons as heat pumps:

1. Filter Cleaning

Indoor unit filters clog with dust over time. A clogged filter reduces efficiency, increases running costs, and can damage the unit. Most filters need cleaning every 3 months and replacing annually.

2. Refrigerant Pressure Check

Refrigerant leaks are common over time. Even small leaks reduce efficiency, increase electricity use, and eventually cause the unit to fail. F-gas regulations require leak testing on systems above certain refrigerant volumes.

3. Coil Cleaning

Outdoor unit coils accumulate leaves, pollen, dust. Indoor evaporator coils accumulate biofilm and dust. Both reduce efficiency dramatically if not cleaned annually.

4. Drainage Checks

Indoor units produce condensate that drains to outside. Blockages cause leaks inside your home — sometimes catastrophic ones. Annual drain cleaning prevents this.

5. Electrical Connections

Like all electrical equipment, connections degrade over time. Loose terminals are fire risks and cause intermittent faults.

6. Performance Check

A proper service measures actual cooling/heating output and compares to specification. Drops in performance flag problems before they become major.

The Cost of Skipping Servicing

I've seen units fail completely after 4–5 years of use without servicing. Replacement costs more than 5 years of annual servicing combined. Plus the manufacturer warranty (typically 5–7 years) is voided without documented annual servicing.

Choosing an AC Installer

When the time comes to install AC, look for:

• F-gas certified engineer — non-negotiable
• REFCOM membership preferred
• Multiple references from local installations
• Detailed written quote (not just headline price)
• Manufacturer warranty registration as part of the install
• Realistic discussion of running costs (avoid overly optimistic claims)

A bathroom renovation is one of the most expensive home improvement projects you'll ever undertake. Done well, it adds genuine value and lasts decades. Done badly, you're back into the walls within five years fixing problems that should never have existed.

I do the plumbing side of bathroom renovations regularly across Orpington, Bromley, Sevenoaks and the wider Kent region — usually working alongside trusted local tilers, electricians and decorators. After 15+ years of bathroom work, here are the plumbing decisions that genuinely matter and the mistakes I see homeowners make again and again.

Plan the Plumbing Before You Plan the Look

This is the single biggest mistake — choosing your tiles and bathroom suite first, then trying to make the plumbing fit. The best bathrooms work the other way round.

Things to think about FIRST:

• Where is the soil pipe currently, and can it be moved? (Hint: usually yes, but it's expensive)
• What's your incoming water pressure? (Determines what shower system you can have)
• Is your hot water from a combi, system boiler with cylinder, or unvented cylinder? (Determines flow rates)
• What does the existing waste pipework look like? (Determines where the toilet, basin and bath/shower can go)
• Where do you want the radiator? (Towel rails are usually fine, full radiators need wall space)

Shower Systems: The Most Important Decision

The shower is what your customers (well, family) will judge the bathroom by. A weak shower with poor flow and unstable temperature ruins an otherwise perfect bathroom.

Mixer Showers

Take hot and cold supplies and blend them. Reliability and quality of flow depends entirely on water pressure and flow rates of your hot water system. Excellent with mains-pressure unvented systems.

Thermostatic Mixer Showers

Same as above but maintain temperature when other taps are used elsewhere. Essential for safety in family bathrooms — no scalding when someone flushes a toilet.

Electric Showers

Heat cold water on demand. Independent of your hot water system — useful for ensuites or where hot water demand is high. Generally lower flow rates than thermostatic showers fed by good hot water systems.

Digital Showers

Premium thermostatic showers with electronic controls. Excellent temperature stability and convenience features. Significantly more expensive but genuinely lovely.

Concealed vs Exposed Pipework

Concealed pipework (chased into walls) looks beautiful. But it's also a minefield if not done correctly:

• All joints must be done before tiling — no later access
• Pressure-test the system before walls go back up
• Use proper push-fit fittings rated for buried use, not just any pipe
• Mark the pipe routes for future reference
• Some areas (party walls, under load-bearing walls) restrict what can be chased

I always pressure-test the entire bathroom plumbing system at 1.5× working pressure before any tiling starts. If something's going to fail, I want it to fail before the tiler arrives.

Toilet Choice: Back-to-Wall vs Close-Coupled

Back-to-wall toilets with concealed cisterns look stunning. They also need:

• A proper frame with adjustable height
• Solid wall behind to mount it
• Service access via the flush plate (not a separate panel)
• Quality cistern brand — Geberit is the gold standard

Cheap back-to-wall systems are a false economy. The frame fails, the flush valve fails, and accessing the components is a nightmare. Spend properly here.

Basin Considerations

Three things people get wrong:

• Basin height — should be set to suit the tallest person who'll use it daily. 870mm is standard but I often install at 900–910mm.
• Tap height — make sure the tap clearance over the basin lets you wash your hands without splashing.
• Waste type — slotted vs unslotted matters. Slotted is needed for basins with overflows.

Heating: Towel Rail vs Radiator vs Underfloor

Many bathrooms now have heated floors. Done correctly, this is wonderful — warm tiles in the morning. Done badly, it's expensive to run and slow to warm up.

Decisions to make:

• Electric or wet underfloor? Wet costs more but runs cheaper.
• If keeping a towel rail, is it your only heat source? Most aren't powerful enough for the room — supplement with underfloor or a separate radiator.
• Smart thermostat? Highly recommend for energy management.

Waterproofing — The Most Important "Invisible" Job

Tanking (waterproofing) of wet areas is essential. Not all tilers do this properly. The tanking system should:

• Cover the entire shower enclosure floor and walls up to 2m high
• Cover the bath/shower area in similar fashion
• Use proper joint tape at all internal corners
• Be allowed to fully cure before tiling
• Be tested for water-tightness before tiling starts

Skimping on this is the most common reason for bathroom leaks 2–5 years after renovation. Insist on it being done properly.

Realistic Project Costs

For a typical full bathroom renovation in our area:

• Budget renovation: £4,000–£7,000 (basic suite, basic tiles, like-for-like layout)
• Mid-range: £7,000–£14,000 (quality suite, layout changes, decent tiles)
• High-end: £14,000–£30,000+ (premium fittings, complete redesign, luxury finishes)

Plumbing typically represents 20–30% of total cost. The other 70–80% is tiles, suite, electrical, decoration and labour for the other trades.

Working with the Right Trades

Smith EcoFlow handles the plumbing side. For the full bathroom, you'll need a tiler (specialist bathroom tilers are worth their weight in gold), a sparky for any electrical changes, and possibly a plasterer/decorator. We work alongside trusted local trades — happy to recommend people we know do good work.

"How much does a plumber cost?" is the question I get asked more than any other across Orpington, Bromley, Sevenoaks and the wider Kent area. The honest answer is "it depends" — but that's not very helpful, so this guide breaks down real-world plumbing costs in 2026 from someone who actually does the work locally.

What you'll find online is often misleading: national averages that don't reflect London-edge pricing, "from £XX" pricing that bears no relation to what you'll actually pay, or quotes inflated to scare homeowners into agreeing without question. Here's what's actually fair.

Typical Plumber Hourly Rates in Orpington & Bromley

Most plumbers in our area charge between £60 and £95 per hour for general plumbing work, with a one-hour minimum charge. The variation depends on:

• Qualifications — a City & Guilds plumber with G3, WRAS and CIPHE membership commands more than someone with no formal qualifications
• Specialism — heat pump and unvented cylinder specialists charge more than general plumbers because their equipment, training and insurance cost more
• Insurance & certification — fully insured plumbers with public liability and professional indemnity build that into their rates
• Travel — plumbers covering wide geographic areas (the whole of Kent, for example) factor travel time into rates

Be wary of anyone quoting much below £55/hour. Either they're not insured, not qualified, or cutting corners somewhere — and that always ends up costing you more.

Call-Out Fees: What's Normal?

Call-out fee practices vary wildly. Some plumbers charge a separate call-out fee on top of the hourly rate. Others (Smith EcoFlow included) don't charge a call-out fee during normal working hours — you only pay for the time spent doing the work.

For out-of-hours emergency work, expect a higher rate (typically £85–£150/hour) plus possibly a minimum attendance charge. This is normal — getting an engineer out at 11pm on a Sunday costs more than a Tuesday morning.

Fixed-Price vs Hourly: Which Is Better?

For straightforward jobs you know the scope of, fixed pricing is almost always better for the customer. You know exactly what you're paying, the plumber works efficiently, and there's no incentive for them to drag the job out.

For diagnosis-heavy work where the cause isn't clear (intermittent leaks, mystery pressure issues), hourly billing makes sense — the plumber genuinely doesn't know how long it will take until they investigate.

Real-World Costs of Common Plumbing Jobs in 2026

Here's what realistic local pricing looks like for the most common jobs across Orpington and Bromley. These are typical fully-supplied-and-fitted prices including parts and labour:

Tap & Toilet Repairs

• Replace a kitchen tap — £80–£140 supply & fit (more for premium taps you provide)
• Replace a basin tap — £70–£120 supply & fit
• Fix a dripping tap — £55–£90 (usually a washer or cartridge replacement)
• Replace a toilet flush mechanism — £75–£130
• Fix a constantly running toilet — £55–£95
• Unblock a toilet — £75–£140 depending on severity

Leak Detection & Repair

• Visible leak repair (under sink, accessible pipe) — £80–£180
• Hidden leak detection — £150–£350 depending on complexity
• Repair burst pipe — £120–£300 depending on access and pipe location
• Replace failed flexible hose — £55–£90

Bathroom & Kitchen Plumbing

• Replace bathroom basin — £180–£350 supply & fit
• Replace bath — £400–£900 plumbing only (excluding tiling/decoration)
• Replace toilet — £250–£500 supply & fit
• New shower installation — £350–£900 plumbing depending on type
• Full bathroom plumbing — £1,200–£3,500 plumbing only
• Plumb in a washing machine — £80–£140
• Plumb in a dishwasher — £80–£140
• Outside tap installation — £140–£260

Heating & Hot Water

• Radiator replacement — £180–£380 supply & fit
• System balancing — £140–£220
• Power flush — £450–£900 depending on system size
• Annual unvented cylinder service (G3) — £125 fixed (Smith EcoFlow special)
• Annual ASHP service — £160 fixed (Smith EcoFlow special)
• TRV replacement — £45–£75 each

Why Some Plumbers Quote Far More (or Far Less) Than This

If a quote feels wildly out of line with the figures above, ask why. Common reasons for genuinely higher prices include:

• Difficult access (cellar, loft, behind built-in furniture)
• Older properties with non-standard pipework requiring adapters
• Premium materials or specialist parts
• Multiple compounding issues caught during inspection

Common reasons for suspiciously low prices include:

• Not actually insured
• Quote excludes parts (suddenly there are "extras")
• Plan to do additional work and charge for it as "found problems"
• Will use cheap parts that fail within a year

How to Get a Fair Quote

Three things to ask of any plumber before booking:

1. Is this a fixed price or estimate? Get clarity in writing.
2. Are parts included? Some quotes are labour-only.
3. What's your call-out fee policy? Make sure no surprise charges appear.

Get 2–3 quotes for any job over £200. Quotes that vary by more than 30% from each other usually indicate something is off — investigate the cheapest and most expensive.

What Smith EcoFlow Charges

I work on a fixed-price basis wherever possible. For jobs that need diagnosis first (leaks, pressure problems), I charge an hourly rate after a free initial assessment. There's no call-out fee during normal working hours — you only pay for the work I do.

All quotes are written, transparent, and stand for 30 days. Parts and labour are itemised so you can see exactly what you're paying for.

Hiring the wrong plumber costs more than money. It costs you damaged floors from a botched leak repair, a flooded ceiling from a poorly-fitted cylinder, an "easy fix" that becomes three return visits, or worst of all — work that actually breaches Building Regulations and creates problems for you when you sell your home.

I've seen all of these in homes across Orpington, Bromley, Sidcup and Sevenoaks where someone before me did the work badly. Most of those situations could have been avoided by asking a few simple questions before the plumber started.

Here are the 10 questions every homeowner in our area should ask before letting any plumber touch their pipework.

1. "Are You Fully Qualified?"

Plumbing isn't legally required to be a qualified trade in the UK — anyone can call themselves a plumber. But qualifications matter for safety, insurance, and quality of work.

Look for City & Guilds Level 2 (or NVQ) as the minimum. For specialist work like unvented hot water cylinders, G3 qualification is a legal requirement. For water regulations compliance, WRAS approval matters. Membership of the CIPHE (Chartered Institute of Plumbing and Heating Engineering) indicates ongoing professional development.

Ask to see proof. A genuine plumber will produce certificates without hesitation.

2. "Are You Fully Insured?"

This is non-negotiable. A plumber working in your home should carry:

• Public liability insurance — covers damage to your property if something goes wrong
• Professional indemnity insurance — covers professional advice and design errors

Without these, if a plumber floods your house, you're potentially the one paying for the repairs through your own buildings insurance — and your insurer may refuse to cover work done by an uninsured tradesperson.

3. "Will You Provide a Written Quote?"

A verbal quote is worth nothing. A written quote — even just a text or email — establishes:

• Exactly what work is included
• What parts are included
• Whether VAT applies
• Validity period
• What happens if the scope changes

If a plumber refuses to put their quote in writing, walk away. They're either not confident in their pricing or planning to add extras later.

4. "Do You Charge a Call-Out Fee?"

Call-out fee practices vary. Some plumbers charge a flat fee for arriving regardless of whether work happens. Others charge by the hour from arrival. Others (Smith EcoFlow included) charge nothing for arriving during normal working hours — you only pay for the work done.

Get clarity upfront. There's nothing wrong with charging a call-out fee as long as it's disclosed before you book.

5. "Can You Show Me Recent Local References?"

A plumber working locally will have recent customers nearby. Ask for 2–3 references from jobs in your area within the last 6 months. Genuine plumbers have these readily available — usually with photos.

Cross-check by looking at Google reviews for the business name. Look at the pattern: 30+ reviews over years, all genuine-sounding with specific job details, is far more credible than 5 reviews all posted in the same week.

6. "What's Your Specialism?"

Plumbing is a broad trade. Some plumbers are generalists who do a bit of everything. Others specialise — heat pumps, unvented systems, commercial work, bathroom installations.

For specialist work, hire a specialist. Asking a general plumber to service your Mitsubishi Ecodan heat pump is like asking a general doctor to perform brain surgery — they might know broadly what's involved, but they're not the right person for the job.

7. "Do You Provide Workmanship Guarantees?"

Quality plumbers stand behind their work. Ask:

• How long is the workmanship guarantee?
• What does it cover specifically?
• How quickly will you return if there's a problem?
• Is the guarantee in writing?

A plumber refusing to guarantee their work is telling you they don't expect their work to last. Walk away.

8. "Will You Be Doing the Work Yourself?"

For sole traders this is obvious — but worth confirming. For larger plumbing companies, you might be quoted by an experienced manager but the actual work done by an apprentice or subcontractor.

Ask who will be doing the work, what their qualifications are, and whether they'll be supervised. There's nothing inherently wrong with apprentice work — it has to start somewhere — but you should know what you're getting.

9. "How Will You Protect My Home?"

Plumbing work is messy. Pipework gets opened, water spills, dust gets created, fittings get swapped. A professional plumber arrives prepared:

• Dust sheets to protect floors and furniture
• Drip trays under work areas
• Shoe covers if walking through carpeted areas
• A plan for cleaning up afterwards

If a plumber's response is "I'll be careful" without specifics, expect a mess.

10. "What's Your Payment Policy?"

Genuine plumbers don't ask for full payment upfront for routine domestic work. Standard practice is:

• For small jobs (under ~£500): payment on completion
• For mid-size jobs: small deposit (10–25%) then balance on completion
• For larger projects: staged payments tied to progress milestones

Anyone asking for full upfront payment, demanding cash only, or refusing to provide an invoice is a red flag. You want a paper trail in case anything goes wrong later.

Bonus: Trust Your Gut

The plumber's coming into your home, often when you're not there. Beyond qualifications and references, you should feel comfortable with the person. If something feels off — they're evasive about questions, the quote keeps changing, they're pushy about starting immediately — listen to that instinct.

The Verdict

Hiring a good plumber in Orpington, Bromley or anywhere across South East London comes down to qualifications, insurance, transparency, and reputation. The 10 questions above filter out 95% of the bad ones. The remaining 5% you'll spot on instinct.

The good news: most plumbers in our area are honest, qualified, hard-working tradespeople. The questions above let you find the right one for your specific job — and avoid the small minority who give the trade a bad name.

Plumbing emergencies don't politely wait until business hours. The worst ones happen on a Sunday evening, on Christmas Day, or while you're on holiday. By the time the plumber arrives — even if response is fast — significant damage may already be done unless you take the right action in the first few minutes.

I run a 24/7 emergency plumbing line for Orpington, Bromley and Kent. The customers who minimise damage are the ones who know what to do before I arrive. This guide tells you exactly that — broken down by emergency type — so you can act fast and confident when something goes wrong.

Burst Pipe

The most damaging emergency. A burst pipe under mains pressure can release thousands of litres in an hour, flooding ceilings, wrecking floors, and triggering insurance claims that take months to resolve.

What to do — in order:

1. Turn off the internal stopcock immediately. Clockwise to close. This isolates the entire property.
2. Open all cold taps to drain the system fast. Less water in the pipes = less water leaking.
3. Turn off your boiler or heat pump — without water flow, heating systems can damage themselves.
4. Switch off electrics at the consumer unit if water is anywhere near electrical fittings or sockets.
5. Move valuables and electronics out of the affected area.
6. Place buckets and towels to catch ongoing drips.
7. Call an emergency plumber.
8. Take photos and videos for your insurance claim before cleanup.

Don't try to fix a burst pipe with tape or sealant unless absolutely necessary as a temporary measure — and only on visible, accessible pipework with low pressure.

Overflowing Toilet

Water plus gravity plus contamination — overflowing toilets cause more damage than people expect because they keep flowing until manually stopped.

What to do:

1. Stop the flush mechanism. Lift the cistern lid and lift the float ball to stop water filling.
2. Turn off the toilet's isolation valve. There's usually a small valve where the cold supply enters the cistern. Turn the screw 90° with a flathead screwdriver.
3. If you can't find an isolation valve, turn off the internal stopcock.
4. Don't keep flushing hoping it'll clear — you'll just add more water.
5. If safe, try a plunger or toilet auger to clear the blockage.
6. Use towels to contain the spill from spreading to other rooms.
7. Disinfect thoroughly after the issue is resolved (toilet water is contaminated).

Boiler or Heating System Leak

A leak from your boiler, heat pump or heating system pipework can be subtle (slow pressure loss requiring frequent topping up) or dramatic (water on the floor near the unit).

What to do:

1. Turn off the boiler or heat pump at the appliance and at the electrical isolator.
2. Turn off the cold water feed to the heating system (separate from the main stopcock — usually a small valve near the boiler).
3. Find the leak source if visible. Most heating leaks come from radiator valves, the boiler itself, or visible pipework joints.
4. Place a container under the leak.
5. Don't keep topping up the system pressure — you're just adding more water to leak out.
6. Call a heating engineer (Gas Safe for gas, ASHP-qualified for heat pumps).

Hot Water Cylinder Failure

Unvented cylinders (Megaflo, Gledhill, Vaillant) are pressurised systems. When they fail, they can fail dramatically — but more often they leak slowly from a relief valve or fitting.

What to do:

1. Turn off the cold water feed to the cylinder (usually a clearly-marked valve where the cold pipe enters).
2. Turn off the heat source (immersion heater, boiler, or heat pump).
3. Don't try to drain the cylinder yourself — this is G3-qualified work for safety reasons.
4. If water is dripping from the external discharge pipe outside your house, this is the safety relief valve doing its job — don't try to stop it.
5. Call a G3-qualified engineer.

Frozen Pipes

UK winters can drop below freezing for days at a time, and exposed or unlagged pipework freezes. Frozen pipes don't leak immediately — but when they thaw, they often split.

What to do:

1. Turn off the internal stopcock first — this minimises damage when the pipe thaws and potentially splits.
2. Open the affected tap fully to relieve pressure as the ice melts.
3. Thaw the pipe slowly with a hairdryer on low, hot water bottles, or warm towels. Start nearest the tap and work backwards.
4. NEVER use naked flames, blowtorches or boiling water — pipes will split or you'll start a fire.
5. Check for leaks immediately after thawing — a thaw can reveal a split.

Blocked Drain or Sewage Backup

Water coming up the wrong way — out of a shower drain, gully, or worst of all toilet — usually indicates a blocked drain. This is genuinely urgent.

What to do:

1. Stop using all water in the property immediately. No flushing, no taps, no washing machines.
2. Check your external drains for visible blockages (leaves, debris).
3. Don't pour drain unblocker down the affected drain — chemicals make later clearance more dangerous and damage pipework.
4. Call a drainage specialist or your water company if it's the main sewer (often the water company's responsibility).

No Hot Water Suddenly

Not always a true emergency, but inconvenient. Quick checks before calling:

• Boiler pressure — should be 1–1.5 bar cold. If lower, top up using the filling loop.
• Programmer/timer — has it changed mode?
• Power — is the boiler/heat pump still receiving electricity?
• Trip switch — has the immersion or boiler tripped?
• Gas supply (gas systems only) — has the gas been cut off?

What to Tell the Plumber When You Call

A clear initial call gets help to you faster. Have ready:

• Your full address with postcode
• Brief description: "burst pipe under kitchen sink, mains is now off"
• What you've already done
• Whether anyone is in danger or there's electrical risk
• Whether children, elderly, or pets are affected

Insurance Claims After a Plumbing Emergency

Most home insurance covers damage caused by leaks but not the cost of fixing the leak itself. After the immediate emergency:

• Document everything with photos and videos before cleanup
• Keep all receipts (emergency call-out, repairs, replacements)
• Don't dispose of damaged items until your insurer has assessed
• Get the work done by a qualified, insured plumber — your insurer may reject claims for work done by uninsured tradespeople

Prevention: Stop Emergencies Before They Happen

Most emergencies are preventable with basic maintenance:

• Annual servicing of unvented cylinders and heat pumps catches small problems before they become emergencies
• Lag exposed pipework in lofts, garages and outbuildings before winter
• Replace flexible hoses on washing machines, dishwashers, and under sinks every 5–10 years
• Test your stopcock twice a year so you know it works when you need it
• Address slow leaks immediately — they always get worse, never better