Power flushing
Sludge and rust flushed out of your whole system — hotter radiators, quieter boiler, lower bills.
About this job
Black sludge (magnetite) builds up in every system over time, causing cold spots, noisy boilers and premature pump and valve failures. A proper power flush pumps cleaning chemicals through each radiator individually at high flow, dislodging years of deposits. We finish with inhibitor and a magnetic filter to keep it clean. We'll always test your water first — if the system's clean, we'll say so and save you the money.
What's included
- ✔Water test first — honest advice on whether you need it
- ✔Full system flush, radiator by radiator
- ✔Cleaning chemicals and neutraliser
- ✔Inhibitor added on refill
- ✔Magnetic filter fitting recommended and quoted
How the job goes
- 1
Get in touch — call, WhatsApp or the quote form. Photos help us quote power flushing accurately.
- 2
You get a fixed written quote — no hourly rates, no hidden extras.
- 3
We arrive when agreed, protect the work area, and keep you informed as we go.
- 4
The job is completed, tested and checked with you before we tidy up.
- 5
You pay on completion — and we send photos of the finished work for your records.
Common questions
How much should I budget for power flushing?
From £380 for up to 8 radiators; £25 per additional radiator. Every job gets a fixed written quote before work starts — no hourly-rate surprises.
How long does a power flushing job take?
Most of a day We'll confirm the timescale with your quote, and we turn up when we say we will.
Areas we cover for power flushing
More heating & boilers jobs we do
Whole houseAnnual boiler service
Whole houseGas safety certificates (CP12)
LandlordsRadiator replacement
Any roomRadiator balancing & bleeding
Whole houseThermostats & smart controls
Hallway / Living roomCirculation pump replacement
Airing cupboard / BoilerHot water cylinder repair
Airing cupboardThermostatic radiator valve (TRV) installation
Any roomMagnetic system filter installation
BoilerFrozen & blocked condensate pipes
Boiler / ExteriorUnderfloor heating repairs
Bathroom / Kitchen
Ready to book power flushing?
Free quotes, usually the same day — and we turn up when we say we will.