What is a Powerflush?

Diagram of powerflushing process

A Powerflush is a cleansing process which aims to remove deposits of sludge, rust and any other debris from your central heating system. These contaminants, if left, can seriously affect the efficiency of a heating system and, in severe cases, a powerflush could be the only option available. Over time the water in your pipes, boiler and radiators deposits unwanted by-products like rust. This rust (plus other dirt and debris) becomes an unpleasant, mud-like substance that professionals affectionately refer to as ‘sludge’.


Sludge in your heating system can cause blockages and corrosion which will lead to both inefficiency and / or breakdown. In extreme cases it can be so damaging that a complete boiler replacement is needed.

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Powerflushing diagram showing before and after

When do you need a Powerflush?

If you carry out regular servicing and maintenance (professional servicing is recommended annually) then a preventative Powerflush should only be necessary every 5-6 years to clear debris and prevent significant blockages.


IMPORTANT: If you are planning to replace your boiler it’s important that the engineer performs a Powerflush before the installation. Otherwise, you risk contaminating the new boiler with damaging sludge and debris that’s hanging around in the old pipework. This will also void your manufacturers warranty.

Money waster on fuel bills every year

The warning signs

Here are signs to look out for that suggest that all is not well in your central heating system.

  • Cold areas on radiators e.g. at the bottom
  • Noise from the boiler and/or the heating system pump
  • Discoloured water when you bleed the radiators
  • Heating is slow to warm up
  • Some radiators struggle to heat up as well as others
  • Radiators cold but pipes are hot
  • Boiler regularly shuts down and needs restarting
  • No water escapes when you bleed a radiator
  • Noisy radiators and or / boiler
  • Small leaks in radiators.

If any of these problems sound familiar to you, it’s time to contact an experienced engineer. While a Powerflush may be all that is required to get your heating back on track, unfortunately it is not always that simple. A system may be so damaged that it is actually cheaper to replace rather than repair. 

The benefits

Better heat output

Warm house

Comfort

cosey house

Saving the Euro

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