Our Proces

How Power flushing works

Over time, central heating systems can suffer from a build-up of rust, sludge, and debris — leading to cold radiators, noisy boilers, and reduced heating efficiency. Our expert Power Flush service in Derby is designed to thoroughly clean your entire heating system, restore its performance, and extend its lifespan.
We use industry-leading equipment, specialist chemicals, and skilled local engineers to ensure your system runs like new — with minimal disruption and maximum care. Here’s how our process works:

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Step 1

Inspect your central heating system

Before starting the Power Flush, our engineers carry out a full system assessment to ensure your heating system is ready and suitable for flushing.
This includes:

  • Checking radiator temperature distribution to identify cold spots

  • Testing water quality for signs of sludge, corrosion, or limescale

  • Verifying system pressure and pump flow rate

  • Inspecting key components like valves, pumps, and the boiler itself

These checks help us tailor the Power Flush to your system’s needs and avoid any risk of damage during the process.

Step 2

Sludge and debris flushed out

We connect a high-powered Fernox flushing pump to your system,  usually through a radiator or pump coupling. Specialist cleaning chemicals are added to the system’s water, which is then circulated at high velocity but low pressure.

This combination dislodges built-up rust, sludge, and other debris from radiators, pipes, and your boiler by using:

  • Magnetic filters to capture metallic particles

  • Agitation tools to dislodge stubborn build-up

  • Safe disposal methods to remove dirty water and waste

This deep clean transforms your heating system from the inside out.

Step 3

Post Power Flush aftercare delivered

Once all sludge and debris have been removed, we continue flushing the system and each radiator individually until the water runs completely clear.

To protect your system long after the flush, we refill it with clean water and introduce a corrosion inhibitor. This solution prevents future sludge formation and keeps your system running efficiently for years to come.

Step 4

System is restored to maximum efficiency

With your heating system fully cleaned and protected, you’ll notice a real difference:

  • Hotter radiators with even heat distribution

  • Quieter boiler operation

  • Improved energy efficiency and lower heating bills

No radiators need to be removed, and we handle all the mess for you. Our team ensures the process is seamless, leaving you with a warm, comfortable home and a system that performs like new.

Frequently Asked Questions

How does a power flush work in a central heating system?

A power flush involves connecting a specialist pumping unit to your central heating system. Using high-strength cleaning chemicals, the pump forces water through your radiators, pipework, and boiler at high speed. This dislodges and removes sludge, rust, and limescale build-up, leaving your system clean and running more efficiently.

 Power flushing uses a high-powered pump, often connected to your system via a radiator or the boiler’s circulation point. Alongside the pump, chemical cleaners and inhibitors are added to break down sludge and prevent future corrosion. As Derby-based power flush specialists, we use the latest equipment to ensure a thorough clean every time.

Yes, power flushing is completely safe for combination boilers when carried out by a qualified heating engineer. In fact, it’s especially beneficial for combi systems, which can become blocked or inefficient due to sludge build-up. Our experienced team in Derby regularly performs power flushes on combi boiler systems.

Yes, but with caution. Micro bore pipework (typically 8mm or 10mm pipes) can be more susceptible to blockages and may not always respond well to high flow rates. As Derby-based heating professionals, we assess the system beforehand and use adjusted flow rates and chemical concentrations suitable for micro bore systems.

Absolutely. A successful power flush restores full water circulation through radiators and pipework, eliminating cold spots, reducing boiler strain, and helping your home heat up faster and more evenly. It can also lead to lower energy bills and a longer lifespan for your boiler.

Yes, power flushing is a non-invasive and proven method of central heating maintenance. When carried out by experienced engineers using the correct tools and flow rates, it is completely safe for all types of systems, including older ones. We always conduct a system health check before beginning the process to ensure compatibility.

A standard power flush typically takes between 4 to 8 hours, depending on the size of the property and the condition of the system. Larger homes or heavily sludged systems may take longer. We always aim to complete the job with minimal disruption and maximum results.