Heating system sludge is rust and debris that builds up inside radiators and pipework over years, settling wherever the water moves slowest. Bridgend has plenty of older systems quietly suffering from it, and the symptoms are recognisable from the sofa: radiators hot at the top and cold at the bottom, rooms that lag behind the rest of the house, dirty black water when you bleed a radiator, and kettling, the rumble and bang of a boiler forcing water through a scaled heat exchanger.
Left alone, sludge does real damage. It makes the boiler work harder for less heat, it kills pumps, and it is a leading cause of heat exchanger failure. The fix is a proper flush, and this page gives you the prices straight rather than after a visit.
What a MagnaCleanse flush actually does
A MagnaCleanse flush circulates the system at high flow while powerful magnetic filters capture the suspended iron sludge, radiator by radiator, until the water runs clear. The system is then dosed with chemical inhibitor to slow new corrosion. It is a different job from draining and refilling, which leaves the settled sludge exactly where it was, and you can see the machine doing its work in the photos further down this page: those are Lloyd’s own jobs, not stock images.
One honest note, because flushes are among the most oversold jobs in heating: not every system needs one. A lightly affected system can often be sorted with a chemical inhibitor and clean at £120. If that is all yours needs, that is what Lloyd will recommend, and the 197 five-star reviews exist partly because he prices that way.
The two prices, and why they differ
A standalone power flush is £499, fixed before booking. The same flush carried out alongside a new boiler installation is £350. The difference is logistics, not a gimmick: during an installation the system is already drained, opened and being worked on, so flushing it costs less than opening a system up specially. If your boiler is on its way out anyway, do both jobs together and save the difference.
Fitting a new boiler into a sludged system is how heat exchangers die young, and a clean, inhibited system is what manufacturers expect to see behind their warranty. If you suspect the boiler itself is the patient rather than the radiators, start at the repair page instead and get an honest diagnosis first.
How to book it
Call or WhatsApp 07712 646488 and describe the symptoms: which radiators run cold, what the water looked like last time you bled one, any noises from the boiler. Lloyd is a Gas Safe registered engineer based in Pencoed, ten minutes from Bridgend, and he will tell you straight whether your system needs the full flush, the £120 treatment, or neither. The price is fixed before booking either way, and if a new boiler is part of the conversation, the online quote tool prices that in about 90 seconds.
