Central Heating
Central Heating Power Flush
Clear out the sludge and rust that builds up over years of use — restore radiator heat output, quieten your boiler and extend the life of the whole system.
Over time, central heating systems build up a thick black sludge of rust and corrosion. That sludge collects in the bottom of radiators (causing cold spots), narrows pipework, and ends up in your boiler's heat exchanger — where it makes the boiler noisy, inefficient, and far more likely to break down.
What a power flush does
We connect a high-flow flushing machine to the system and circulate cleaning chemicals at low pressure through every radiator in turn. The sludge is broken up and pumped out, the system is dosed with an inhibitor, and we usually recommend fitting a magnetic filter so the problem doesn't come back.
You should consider a power flush if
- Radiators are cold at the bottom but hot at the top
- Some radiators don't get hot at all
- The boiler is noisy or "kettling"
- The system is slow to warm up
- You bleed dirty black water from a radiator
- You're fitting a new boiler to an older system
What's included
Full power flush of every radiator, chemical cleaner and inhibitor dosing, system check, written report, and a magnetic filter fitted (optional extra) to keep the system clean going forward.
FAQs
How do I know if my system needs a power flush?+
Tell-tale signs are cold spots on radiators (especially at the bottom), noisy boilers, slow warm-up times, dirty black water when you bleed a radiator, or repeated boiler breakdowns. We can check during a service visit.
How long does a power flush take?+
Typically a full day for an average 8–10 radiator system. Larger or heavily sludged systems may take a day and a half.
Is a power flush included with a new boiler install?+
Yes — we always carry out a full system flush before commissioning a new boiler, and fit a magnetic filter to protect it going forward.