Power flush machine connected to a radiator with dust sheets down

Power flushing · Central heating

Power flushing in Andover

Sludge and rust cleared out of your radiators and pipework, so the heating warms up properly again.

Ask about a power flush 07774 319391

5.0 on Google from 63 reviews · Gas Safe and OFTEC registered

How much is a power flush in Andover?

A power flush is priced after a quick look, because the number of radiators and the state of the system affect how long it takes. Tell Dexter how many radiators you have and he gives you a fixed price.

Need it looked at quickly? Call 07774 319391 or WhatsApp Dexter.

Signs you need a power flush

Radiators are cold at the bottom or in patches
Rooms take a long time to warm up
The boiler bangs, kettles or keeps cutting out
Bleeding a radiator gives black water
You are having a new boiler fitted

Power flush machine set up with dust sheets down, a DWM job in the Andover area — Power flush machine set up with dust sheets down

How Dexter fixes it

Over the years, central heating systems collect black sludge, rust and scale. It settles at the bottom of radiators, blocks pipes and valves, and makes the boiler work harder. The signs are radiators that are cold at the bottom, rooms that take a long time to warm up and a boiler that kettles or bangs.

A power flush pumps cleaning chemicals through the whole system at high flow, radiator by radiator, until the water runs clear. Dexter then refills the system with inhibitor to protect it, and fits a magnetic filter if there is not one already, so the sludge does not build up again. The photos below show what comes out of a typical system.

A power flush is often done when a new boiler goes in, to protect the new boiler and its warranty.

Power flush machine by a cylinder cupboard, a DWM job in the Andover area — Power flush machine by a cylinder cupboard

What a power flush includes

Flush machine connected to the system
Cleaning chemical circulated through every radiator
Each radiator flushed in turn until the water runs clear
System refilled and inhibitor added
Magnetic filter fitted if needed
System balanced and checked

Price

Fixed price after a quick look

Priced after a quick look, based on the number of radiators and the state of the system.

Get it looked at

What affects the price

The number of radiators
How badly the system is sludged
Whether a magnetic filter is needed
Radiators or valves that need replacing

How long it takes. A power flush usually takes most of a day for an average home.

How it works

No call centre and no sales visit. The person you speak to is the person who does the job.

1Send the form
Tell Dexter how many radiators you have and what the heating is doing.
2A fixed price
He confirms the price and agrees a day for the flush.
3Flushed and protected
The system is flushed until clear, then protected with inhibitor and a filter.

Dexter's own photos

Real jobs, photographed by Dexter. No stock pictures.

Sludge flushed out of an old heating system
Magnetic filters full of sludge from an old system

What customers say

5.0 on Google from 63 reviews. Read them all on Google

★★★★★

Excellent service. Dexter resolved a number of issues with our Central Heating/Hot Water system by working methodically through them. He was friendly and professional and responded in a timely manner to our enquiry. All was resolved in a couple of visits and within 36 hours. We are really pleased and have already asked Dexter to quote for some more work for us.

Anthony DraytonGoogle review, February 2024

★★★★★
Dexter was extremely helpful and friendly, and was able to fix and repipe my leaky radiator on short notice and for a fair price. Would not hesitate to recommend :) thank you!
Katriona WestwoodGoogle review, April 2024
★★★★★
Used this company to sort a few heating and plumbing issues with a property I purchased. Really friendly and professional service, explained to me the problems in simple terms and fixed everything quickly for me.
Kirk SelfGoogle review, April 2024
★★★★★
Had lots of work carried out by Dexter. Including radiator installs, vented cylinder installation, boiler service, toilet repairs. Very knowledgeable, very clean and works efficiently. Would highly recommend him to anyone needing any plumbing/heating works
Craig GouldingGoogle review, August 2026

Questions

Power flushing:
your questions

Not sure what boiler you have? Send Dexter a photo and he will tell you.

WhatsApp Dexter

Does a power flush damage old pipes?

A power flush can reveal existing weak points in very old systems. Dexter looks at the system first and tells you if he has any concerns.

How long does a power flush take?

Usually most of a day, depending on the number of radiators.

Is a power flush included with a new boiler?

Every new boiler includes a chemical system flush and a magnetic filter. A full power flush is recommended for heavily sludged systems.

Will a power flush fix every cold radiator?

It fixes cold spots caused by sludge. Cold radiators caused by faulty valves or balancing are dealt with separately.

Ask Dexter about power flushing

Send the short form and Dexter rings you back himself. Or call 07774 319391 or send a WhatsApp.

Gas Safe and OFTEC registered · 5.0 on Google from 63 reviews · Based in Andover, covering Hampshire and Wiltshire