Power flush and system balancing for combination boilers
Sludge in a heating system leaves radiators cold at the bottom and makes a boiler noisy and slow. A power flush cleans it out. We carry out power flushes and fit magnetic filters on combination boiler systems, from £499 for up to 6 radiators.
Price
Power flush from £499 (up to 6 radiators). That covers a combination boiler system with up to 6 radiators. For more than 6 radiators, send us photos on WhatsApp for a fixed quote.
What we do
Photos first, price confirmed, then the work
Four steps, so you know where you stand.
Step 1: Send photos
WhatsApp a photo of the boiler, a few radiators and how many there are. Tell us what the heating is doing.
Step 2: Price confirmed
Up to 6 radiators is from £499. More than 6, we give you a fixed quote from your photos.
Step 3: Flushed clean
We circulate a cleaning solution through the system and flush radiator by radiator until the water runs clear.
Step 4: Filter and balance
We fit a magnetic filter, add inhibitor and balance the radiators.
Signs your system needs a flush
Radiators that are cold at the bottom and warm at the top, cold patches, a heating system slow to warm up, discoloured water when you bleed a radiator, and a boiler that bangs or kettles can all point to sludge. A boiler fault can look similar, which is why we ask for photos and the symptoms first.
If the problem turns out to be the boiler, we say so, and our boiler repair team can help.
What a power flush involves
A pump is connected to the heating system and circulates a cleaning solution at high flow, which loosens sludge and scale. We then flush the radiators one at a time until the water runs clear, add inhibitor and balance the system so the heat is even.
A flush can show up leaks on very old pipes or radiators that sludge was hiding. If we think your system is too tired to flush safely, we will tell you before we start.
Why fit a magnetic filter
A magnetic filter sits on the pipework near the boiler and catches the magnetite that builds up in a heating system. It keeps the system cleaner after a flush and can be cleaned on a boiler service. Many boiler manufacturers ask for a clean system and a filter as part of their warranty, so check your boiler paperwork.
Not sure whether you need a full flush? Ask us about a filter on its own, or book a boiler service.
What to send us on WhatsApp
- The boiler, with the make and model visible
- A few radiators, especially any that are cold at the bottom
- How many radiators the home has
- Any photos of dark or discoloured water
- What the heating is doing, and for how long
Up to 6 radiators: from £499. More than 6 radiators: send us photos on WhatsApp for a fixed quote.
Send photos on WhatsAppFrequently asked questions
How much is a power flush?
A power flush is from £499 for up to 6 radiators. For more than 6 radiators, send us photos on WhatsApp for a fixed quote.
Is my system suitable for a power flush?
We carry out power flushes on combination boiler systems. Send us the boiler make and a photo of the boiler and a few radiators, and we will tell you honestly whether it is the right job.
Will a power flush damage my radiators or pipes?
A flush can reveal leaks that sludge was hiding on very old pipes or radiators. If we think your system is too old to flush safely, we will tell you before we start.
Do I need a magnetic filter?
It is a good idea after a flush. It catches the sludge that builds up, and many boiler manufacturers ask for a clean system and a filter for the warranty. We can fit one on its own too.
What is system balancing?
Balancing adjusts the valves on each radiator so that hot water reaches all of them evenly, and every room heats properly.
Is a power flush the same as a boiler service?
No. A power flush cleans the heating system. A boiler service checks and cleans a working boiler.