What is a Power flush?

by | Jul 24, 2019 | Maintenance Advice

Did you know that most boiler breakdowns are due to dirty water and sediment in the boiler? Dirty water and sludge can have a hugely detrimental effect on your boiler performance, causing parts to work harder and longer i.e. your pump would have to be on for longer and fight against the restrictions decreasing its life span. Also, this can increase your gas and electric bills as your system is not working efficiently.

A power flush is a great way to clean your system bringing your heating back to life and working at its optimum level.

But… what is a power flush?

A power flush is a process in which a chemical product is pushed through the system via an external pump and heated. This then creates a reaction within your system that helps break down any sludge/magnetite that may be present allowing for it to be flushed out of the system. Left untouched, these products can build up affecting the performance of your system or even worse, cause serious damage. A power flush breaks down the build-up and removes the unwanted product from the system prolonging the life of your boiler.

Do you need a power flush?


  • Leaking Radiators
  • Noisy Boiler
  • Cloudy Water/ Grey or black water when bleeding
  • Central Heating Taking Much Longer to Heat Up
  • Some Radiators not heating fully
  • No Water Escape When Bleeding Radiators
  • Radiators Have Cold Spots
  • Noisy Radiators


A flush doesn’t take too long at all, though how long it takes depends on the size of your system and the severity of the corrosion present, it will take less time if you have a combi or a sealed system because we wouldn’t need to cap off the cold feed and expansion piping. It would usually take around 6 hours to flush a system completely.

What is the cost?

Again, this is dependent on the size of your system, but in any case, it’s a small price to pay compared to at best, significantly higher energy bills due to the system having to work harder, or worse… having to install a new system due to damage caused by sediment or rust….

Give us a call for a free no-obligation quote – 07722 824665

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