Power Flushing | Remove Radiator Sludge & Cold Spots

If your radiators are cold at the bottom but warm at the top, or your heating system feels sluggish and inefficient, sludge build-up inside your pipes is usually the cause.

Power flushing clears that build-up completely, restoring your system's efficiency and extending its lifespan.

What causes cold spots and sludge

Over time, rust, limescale, and debris build up inside radiators and pipework, particularly in older systems. That sludge settles at the bottom of radiators, blocking the flow of hot water and creating the classic cold-at-the-bottom, warm-at-the-top pattern many homeowners notice but don't always understand the cause of.

Left untreated, this build-up doesn't just make your heating less effective — it also forces your boiler to work harder than it should, increasing wear and pushing up your energy bills in the process.

How power flushing works

A power flush uses a specialist pump to circulate a cleaning chemical through your entire heating system at high velocity, breaking down and removing sludge, rust, and debris from radiators and pipework.

Once complete, an inhibitor is added to help protect the system from future build-up, keeping it running cleanly for longer.

• Restores Full Efficiency — every radiator heats evenly, top to bottom.
• Extends System Lifespan — reduces strain on your boiler and pipework.
• Fully RGII Registered — carried out safely by qualified engineers.

Signs you might need a power flush

Cold spots on radiators, banging or gurgling noises from your heating system, discoloured water when bleeding a radiator, and a boiler that seems to be working harder than it used to are all common signs that a power flush would help.

If you're noticing any of these, it's worth getting your system checked before the issue gets worse.

Serving Dublin, Kildare and Wicklow

Revolution Gas carries out power flushing right across Dublin city and county.

In Kildare, we cover Naas, Celbridge, Leixlip and Maynooth.

Throughout Wicklow we cover Bray, Greystones and Wicklow Town.

Wherever you're based across these three counties, our engineers can carry out a survey, provide a clear quote, and schedule your installation at a time that suits you.

Book a power flush

If your heating system isn't performing the way it should, a power flush is often a quick, affordable fix.

Get in touch on WhatsApp and we'll assess whether it's the right solution for your home.