Do I Need a Powerflush?

If you experience any of the following, we recommend a Powerflush!

  • Cold spots on radiators.
  • Radiators cold at the bottom.
  • Radiators cold at the top.
  • Blocked pipes and valves due to sludge or lime scale.
  • Loud banging noises from boiler.
  • Noisy pipes due to restrictions.
  • Boiler cutting out due to blocked pump.


Why do I need a Powerflush? It can save you money!

We operate a complete radiator flushing service in Greater London, Essex, North Kent, East Surrey and the surrounding areas. KS is your number one choice for Central Heating Powerflushing. We provide a tried and tested Powerflushing solution through our team of fully trained and gas safe engineers.

We provide a specialist Powerflushing service, offering the deep expertise and the high level of customer service you'd expect from a leader in the field. Our aim is to provide you with a competitive price for a system that meets your needs fully, while maintaining our dedication to customer service. Get in touch now for a free quote to see how we can help you.

Benefits of a Powerflush

  • More efficient system.
  • Up to 25% saving on fuel bills.
  • Better circulation.
  • Faster heat up.
  • Quieter system.
  • Rust and limescale protection.
  • Efficient radiators.

What Does It Involve?

When you bleed your rads if the water is a dirty brown colour you need a Powerflush!

The average Powerflush takes about a day, with approximately 30 minutess spent flushing each radiator. A cleaning chemical is flushed through the system at high pressures. All the sludge is then filtered out as it passes back through the machine with a magnetic filter. After the flush we add an inhibitor to the system to stop further corrosion.

We also advise that after a Powerflush you have a magna clean and scale reducer fitted to protect your system.


Compared to our competitors we offer a high value for money service. The prices are as follows;

  • 4 radiator system and below £250.
  • Each additional radiator after that a further £30.
  • All inhibitors and cleaners supplied in price.
  • Have a magna clean and scale reducer fitted for a extended guarantee.

*prices are exclusive of VAT

Powerflush Information

Powerflush Central Heating

Over time, your central heating system can have a build-up of oxide sludge and calcium. The sludge leaves rust and debris in the bottom of radiators which can corrode into oxide sludge. This leads to blockages of waterways in radiators, pipework and heat exchangers. If your radiators are not heating up properly or your pipes are blocked, you will need a central heating power flush, which can be done by your local plumber.

Does My Home Need a Powerflush?

Signs that indicate there is a need for Powerflushing include banging or knocking noises being made by your boiler, your boiler constantly breaking down, your radiators taking a long time to heat up or getting cold spots, and your house feels cold even when the heating is on.

The Benefits of a Powerflush

Having your central heating flushed will make your radiator heat up faster while producing more heat so there are no cold spots. It also makes your boiler run more quietly and produces better hot water temperature. In general a Powerflush makes your central heating system more reliable and efficient, giving you a warmer house with a cheaper gas bill.

If you don’t power flush your central heating system, it could cause unrepairable damage to your boiler and it may need replacing, which costs a lot more than a boiler repair. It could also cause a mechanical failure of heat exchangers, pumps, motorised valves and hydraulic systems in boilers or cause pin-holes to form in radiators and heat exchangers. If the sludge leaks or spills on your carpet or worktop, it will damage and stain it.

What is Involved in a Powerflush?

Radiator power flush involves using a cleansing technique that aims to get rid of deposits of sludge, rust and the other debris from your heating system.

The overall aim of a Powerflush is to revive the full circulation of water around the central heating system; however, it may also eliminate noise from the boiler and also the pump. This suggests that the whole system has got to be flushed to get the best results.

A heating engineer will connect a powerful high flow/low pressure pumping unit to the central heating system – either to the circulation pump in regular boiler systems or the pump head in combi boilers – and with the assistance of high strength cleansing chemicals can flush out any build-up within the system.

The chemicals used for a Powerflush include a sludge crust breaker and remover to help get rid of rust and sludge, a descaler to break down limescale and a corrosion inhibitor to prevent any rusting from occurring. The crust breaker and remover are acid-based and help to combat any rust and and debris, like sand particles, which may have settled at the bottom of the radiators, pipes and boiler. At the end of the process all the chemicals will be washed out of the pipework so there’s no acid left within the central heating system’s water.

The power flush cost can vary depending on the location and the size of the heating system. Usually a power flush takes around six hours to complete and prices start from £350.

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