How long does a power flush take?

Most Leicester homes with 6–12 radiators take a full day. Larger or very dirty systems can take longer.

Will a power flush damage old pipes or radiators?

A flush can reveal weaknesses that already exist, such as a radiator that is rusting through from the inside. We check the system before we start and will tell you if we see a risk.

Do I need a power flush before getting a new boiler?

Many boiler manufacturers ask for the system to be cleaned before a new boiler is fitted to keep the warranty valid. We can flush the system; the boiler itself must be fitted by a Gas Safe registered engineer.

How often should a heating system be flushed?

With inhibitor and a magnetic filter in place, most systems shouldn't need flushing again for many years. Without them, sludge tends to build back up.

Power Flushing Leicester | Central Heating Sludge Removal

Signs your system needs a power flush

Radiators warm at the top but cold at the bottom
Black or brown water when you bleed a radiator
Some radiators heat up slowly or not at all
Kettling, banging or gurgling noises in the system
Radiators that need bleeding again and again
Pinhole leaks in older steel radiators

What a power flush involves

We connect a powerful pump to your heating circuit and push cleaning chemical through the whole system at high flow. Each radiator is flushed in turn, often with vibration on the panel to loosen the deposits, until the water runs clear. The dirty water goes to drain, and the system is refilled with clean water and a corrosion inhibitor so the sludge doesn't come back.

Most homes take a day. We'll protect floors around radiators and leave everything as we found it.

Keep it clean afterwards

We recommend fitting a magnetic system filter on the heating return. It catches the iron particles that cause sludge before they build up, and it's quick to empty at future checks. Inhibitor should be topped up over time – we'll show you how to check it.

A straight answer on gas: we work on the water side of your heating – radiators, valves, pipework and the water in the system. We are not Gas Safe registered, so we don't touch boilers, gas fires, hobs or any gas pipework. If your problem turns out to be on the gas side we'll tell you honestly rather than charge you to find out, so you can call a Gas Safe registered engineer.

Is a power flush always the answer?

No. If only one radiator is cold it might simply be a stuck valve. If the system is quite clean, a chemical clean with a gravity flush may be enough and costs less. We'll test the water and look at how the system behaves before recommending anything.

Areas we cover in Leicester & Nottingham

We cover Leicester, Nottingham and the towns and villages around both cities. If your street isn't listed, just ask.

Leicester & Leicestershire