Power Flushing
Full central heating power flush. Removes sludge, cures cold radiators, improves efficiency, extends boiler life. Typically a single day. No call-out fee.
Power flushing pricing — 2026
Standard call-out and travel included. Prices exclusive of VAT. Corrosion inhibitor refill included. Asterisk reflects site-condition variability.
Call-out fee
FREE
Travel always included
All prices exclusive of VAT. Ranges reflect typical jobs. Final price quoted before any work begins.
How we work
Five steps. No surprises. No pressure.
Call or book
Phone answered within 20 minutes. Free quote form.
Engineer arrives
Gas Safe engineer on site within 2 hours.
Free diagnosis
We check, explain, and quote a fixed price.
Work done
Most jobs completed first visit — common parts on the van.
Guaranteed
1-year parts guarantee on everything we fit.
Power flushing FAQs
What is a power flush?
A power flush pumps a cleaning solution at high velocity through your central heating system to dislodge and remove sludge, rust, and debris. Improves heating efficiency, cures cold spots at the bottom of radiators, and extends boiler life.
When do I need one?
Cold spots on radiators (especially at the bottom), noisy boiler, dirty water when bleeding radiators, reduced efficiency, or if a new boiler is being fitted to an older system. Most UK boiler warranties require a power flush when the boiler is installed.
How much does a power flush cost?
£350 to £800 plus VAT, depending on system size and contamination level. See asterisk — Final cost varies by system size and contamination level. Heavily blocked systems may need additional work.
How long does it take?
Typically a single day — 6-8 hours for a standard 8-10 radiator system. Larger or heavily contaminated systems can take longer; we tell you up-front.
Do you add an inhibitor?
Yes — after the flush we refill the system with corrosion inhibitor (prevents future sludge build-up). Included in the price.
Could the final price be higher?
Yes — Final cost varies by system size and contamination level. Heavily blocked systems may need additional work. We explain any additional work, quote it separately, and only proceed with your approval.
Is there a call-out fee?
No. Standard call-out and travel always included.
Cold radiators? Noisy boiler?
Engineer on site within 2 hours. Phone answered within 20 minutes. No call-out fee.