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Power flushing specialistsPower Flushing in Hull & East Yorkshire
Cold radiators, sludgy black water or a noisy boiler? Our full-system power flush clears rust and iron oxide from your radiators, pipework and boiler — with a completion certificate available on request.
- Gas Safe registered no. 619703
- 20+ years in plumbing & heating
- Power flush certificates on request
- Ideal Max accredited installers
Does your heating sound familiar?
Sludge (black iron oxide) builds up inside every wet heating system over time. These are the tell-tale signs.
Cold spots on radiators
Warm at the top but cold at the bottom or middle — sludge settles and blocks flow.
Black or brown water
Dirty water when you bleed a radiator is a clear sign of corrosion inside the system.
Noisy boiler
Banging, gurgling or “kettling” as the boiler struggles to push water through restricted passages.
Slow to heat up
Rooms taking longer to warm, or some radiators never getting properly hot.
Repeat breakdowns
Pumps, diverter valves and heat exchangers failing again and again.
New boiler going in
A new boiler needs clean water. Flushing first protects the boiler and its warranty.
High flow, low pressure — done properly.
Power flushing uses a dedicated high-flow machine that runs at low pressure, so it cleans thoroughly without stressing your system. Powerful magnets capture magnetic debris as it circulates, and we heat the system water when the boiler isn’t running.
Because our engineers are Gas Safe registered, we can go inside the boiler — removing plate heat exchangers and connecting onto the pump head for maximum flow. It is illegal to remove a boiler casing if you are not Gas Safe registered.
Not to be confused with a “MagnaCleanse”. That process relies on the boiler’s own pump, which doesn’t give enough flow to clean a sludged system properly. We only power flush to industry standard.
Our power flush, step by step
Thermal survey
We check the system with a thermal imaging camera to find blocked radiators and problem areas.
Connect & heat
The flushing machine connects into the system — at the pump head or boiler where needed — and heats the water.
Flush every radiator
Cleaning chemical is circulated and each radiator is flushed in turn, with magnets capturing the debris.
Protect & certify
Clean water, fresh inhibitor, optional magnetic filter, balancing — then a certificate on request.
See the difference on camera
Thermal images taken before and after a Mr Pipes power flush. Blue and purple show where hot water isn’t reaching; after flushing, heat spreads evenly across the whole radiator.
- Faster system heat-up times
- Hotter, evenly heated radiators
- Quieter boiler operation
- Fewer breakdowns and longer boiler life
- May help reduce fuel use where sludge is restricting flow
It’s not pretty — but it’s why your radiators are cold
Every power flush includes
- Pre-flush system and thermal check
- Full-system flush including each radiator individually
- Boiler heat exchanger flushed where required
- Underfloor heating pipework flushed where fitted
- Fresh corrosion inhibitor added
- Radiator balancing and final checks
- Completion certificate available on request
Recommended extra: a MagnaClean filter. Fitted at the same time, it captures debris for years to come and just needs cleaning at your annual boiler service. Many manufacturers specify one to validate the boiler warranty.
Get a power flush quote
Tell us about your system and we’ll call you back with a price.
Power flush reviews
I’d been having issues with several radiators not working. Chris power flushed my system, then returned for a two-day period to flush each radiator in turn until he finally cleared all the blockages. Every radiator is now red hot. I cannot fault his work ethic and he cleaned up after each visit.
Truly amazing service. British Gas “serviced” the boiler and 4 hours later it stopped working, and they won’t flush radiators. Booked Chris to flush the whole system — the water that came out was black, full of rust and debris. The system has never worked so well; we’ve been able to turn the boiler settings down. On time, no mess, first class job for a realistic price.
Today we had a power flush — unbelievable how much sludge came out of our small heating system. The magnetic filters had to be cleaned 3 times. Very thorough, very tidy, and he made sure each radiator was flowing with clean clear water.
Power flushing FAQs
How do I know if my heating system needs a power flush?
Common signs are radiators that are cold at the bottom or in the middle, black or brown water when you bleed a radiator, a noisy boiler (kettling), slow heat-up times, and repeated pump or heat-exchanger failures. We can confirm with a thermal imaging check before recommending anything.
How long does a power flush take?
Most homes take the best part of a day, depending on the number of radiators and how badly the system is blocked. We don’t rush — we keep flushing until the water runs clean and every radiator is heating properly.
Will a power flush damage my old pipework or radiators?
Our machines run high flow at low pressure specifically to avoid stressing the system. If we find radiators or valves that are already failing, we’ll point them out before we start so there are no surprises.
Is a power flush the same as a MagnaCleanse?
No. A MagnaCleanse uses the boiler’s own pump and a couple of magnets, which doesn’t give the flow needed to properly clean a sludged system. A power flush uses a dedicated high-flow machine connected directly into the system.
Do I need a power flush before a new boiler is fitted?
Most boiler manufacturers require the system to be cleaned to BS 7593 before a new boiler is installed, and it can affect the warranty if it isn’t. We can provide a certificate on request so you have proof the work was done.
Can I get a certificate for my power flush?
Yes — a power flush certificate is available on request, which is useful if a boiler manufacturer or installer asks for proof the system has been cleaned. We also recommend fitting a magnetic filter to keep the system clean afterwards.
Radiators still cold?
Book a power flush with Hull’s specialists — Gas Safe engineers, done properly.