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HGB Heating Kent Gas Safe Registered
Power flushing equipment connected to a central heating system in Kent

Gas Safe Registered · Kent

Power Flushing Across Kent

Remove sludge and debris from your central heating system. Restore efficiency, eliminate cold spots, protect your new boiler.

Book a Power Flush Call 01622 485 920

What Is Power Flushing?

Power flushing is a cleaning process that removes built-up sludge, rust, magnetite and debris from your central heating system. Over time, corrosion products circulate through the pipework and radiators, settling out and reducing flow. The result is reduced efficiency, cold spots on radiators, noisy pipes, and — if left long enough — a blocked system that damages your boiler.

A power flush uses specialised equipment to circulate water and cleaning chemicals through the system at high velocity, dislodging and removing these deposits. The result is a clean system that runs efficiently and puts less strain on your boiler and pump.

Kent has moderately hard water in many areas, and mineral deposits can combine with corrosion products to cause sludge buildup faster than in softer water regions. We carry out power flushes across the whole county.

Power Flush Prices
1-2 bed (up to 6 rads) £350 – £450
3 bed (6-10 radiators) £400 – £500
4+ bed (10+ radiators) £500 – £700
Magnetic filter (additional) £120 – £200

Prices include labour, cleaning chemicals, and corrosion inhibitor. Fixed price provided after system assessment.

Book a Power Flush

Do You Need a Power Flush?

Look out for these common signs that sludge is affecting your system:

Cold spots on radiators
Particularly cold areas at the bottom — sludge settles low, blocking flow to the lower sections of each radiator.
Radiators slow to heat up
Some radiators take much longer than others. Sludge restricts the flow of hot water through affected parts of the circuit.
Noisy pump or boiler
Sludge causes resistance in the system, which makes the pump work harder and produce more noise.
Boiler cuts out or overheats
Restricted flow can trigger the boiler's safety shutoffs, causing it to lock out or run unreliably.
Discoloured radiator water
Black or dark brown water when you bleed radiators is a classic indicator of significant sludge and magnetite buildup.
New boiler installation
Most manufacturers recommend — and some require — a power flush before installing a new boiler. Don't connect new equipment to a dirty system.

How We Power Flush Your System

1
System Assessment

We inspect your system, check all radiators, test the pump, and assess the level of contamination before starting.

2
Connect Equipment

We connect the power flushing machine to your central heating system, typically via the pump or a radiator.

3
Full System Flush

High-velocity cleaning chemical circulation through the entire system, loosening and removing deposits.

4
Radiator-by-Radiator

Each radiator flushed individually to ensure complete cleaning throughout the system.

5
Neutralise & Protect

Corrosion inhibitor added to protect your newly cleaned system and slow the return of deposits.

6
Test & Sign Off

All radiators tested for even heat distribution. We recommend fitting a magnetic filter to maintain the clean system.

Power Flushing FAQs

A typical 3-bedroom property takes 4-8 hours. Larger or more contaminated systems take longer. We carry out all power flushes in a single day wherever possible.
Many boiler manufacturers require a power flush as a condition of their installation guarantee. Even where it isn't required, we strongly recommend it — fitting a new boiler to a contaminated system can damage the heat exchanger and void the warranty.
In most cases where cold radiators are caused by sludge, yes. A power flush restores flow and usually eliminates cold spots completely. If cold spots persist after a flush, a faulty valve or other mechanical issue may be the cause.
Most systems don't need flushing more than once every 5-6 years, provided you have a magnetic filter fitted and corrosion inhibitor topped up. Systems without a filter may need more frequent attention.
Power flushing is safe for most systems. On older, heavily corroded systems, there is a small risk of disturbing pipe joints that have been sealing around corrosion for years. We assess the system beforehand and will flag any concerns.

Ready to Get Sorted?

Free quotes, fixed prices, Gas Safe registered. Covering the whole of Kent since 2009.

Book a Power Flush Call 01622 485 920