Power Flushing in Manchester, for radiators that heat up properly.

Cold spots, radiators that take ages to warm up, or a noisy boiler? Sludge in your heating system is a common cause. We flush it out and keep you in the loop at every step.

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  • 5.0 on Google · 21 reviews
  • Gas Safe Register Gas Safe Reg. 965261
Black sludge being flushed out of a radiator by a QS Plumbing engineer

Power Flushing

What is Power Flushing?

Over time, rust and debris build up inside a central heating system and settle as sludge. It collects in radiators, pipes and the boiler, blocking the flow of hot water.

A power flush pumps water through your heating system at high flow to loosen the sludge and carry it out, radiator by radiator. Once the system runs clean, it’s refilled and checked.

Signs your system needs a power flush

Radiators that are cold at the bottom or have cold spots, radiators that are slow to heat up, and a boiler that’s noisier than it used to be are all common signs of sludge.

Not every cold radiator needs a power flush. Sometimes it’s a valve or a balancing issue, and our heating engineers will find the real cause first. A clean system also helps a new boiler work as it should.

Radiator flushing out black sludge
Before: black sludge out
Same radiator now flushing clean water
After: running clear

How it works

Your Power Flush, step by step

No chasing, no guessing. Here's what happens from the moment you get in touch. See how we work in detail →

  1. Book in seconds

    Call, WhatsApp us a photo, or use our quote form. Whatever suits you.

  2. Confirmed by text

    Your booking, time slot and reference land on your phone and in your inbox.

  3. "On the way" text

    We text when our engineer sets off. Every text has our WhatsApp link, so you can ask where they are.

  4. Photos, invoice, done

    Photos of the work, a signed safe work method statement, and an invoice by email. Pay by bank transfer or card link.

Why QS Plumbing

Why choose us for Power Flushing

Cause found first

We check whether sludge is really the problem before recommending a power flush.

Gas Safe engineers

Boiler work is done by Gas Safe registered engineers. Reg. 965261.

Photos of the work

We photograph the work as we go, so you can see what was done.

Kept in the loop

A confirmation by text, an "on the way" text, and our WhatsApp link in every message.

Google reviews

What our customers say

Rated 5.0★ from 21 Google reviews. Read all 21 →

5.0★★★★★21 Google reviews
★★★★★
“Engineer very professional, quick at solving boiler problem, went the extra mile and looked at all radiators too. Explained aftercare of boiler and what to watch out for. Thank you, 5 star rating 🌟🌟🌟🌟🌟”
Andrea P. · Google review
★★★★★
“So impressed with this company. Had an issue with my boiler and they came out to look at it next day. Ended up needing a replacement due to age of boiler which was arranged quickly at a reasonable price, and the guys that came to install got on with the job with no fuss. Communication throughout was perfect with email appointment reminders and proper quotes and invoices. They registered the new boiler warranty for me and it was possible to pay by credit card which was appreciated for a big amount. Will definitely be a repeat customer.”
Matt · Google review
★★★★★
“Highly recommend this company so reliable and very reasonable. Had my boiler serviced today fantastic engineer and he has managed to sort my hive out. Very happy customer see you in a years time for my next service”
Nicola B. · Google review

Power Flushing: your questions answered

How do I know if I need a power flush?

Common signs are radiators that are cold at the bottom or have cold spots, radiators that are slow to heat up, a noisy boiler, and dark, dirty water when you bleed a radiator.

What does a power flush do?

It pumps water through your heating system at high flow to loosen sludge and debris and carry it out, so hot water can flow freely through your radiators again.

Will a power flush fix my cold radiators?

If sludge is the cause, it should help a lot. If the problem is something else, such as a valve or balancing issue, we’ll tell you and fix that instead.

Should I get a power flush before a new boiler?

It’s often a good idea. A clean system helps a new boiler work as it should. We’ll check your system and advise when we quote.

How much does a power flush cost?

Every heating system is different, so we quote each job. Call 0161 826 6000, WhatsApp us or use our quote form and tell us how many radiators you have.

Areas we cover

Power Flushing near you

We're based at 7 Bury New Road in Prestwich, and our engineers cover homes and landlords across Manchester and the North West. Choose your area:

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Ready when you are.

Tell us what you need on WhatsApp, by phone or with our quick form. You'll get a confirmation by text.

Get a quote WhatsApp usCall 0161 826 6000