Central heating
Gas & oil appliances
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Warm air units
Water heaters
Power flushing
What is power flushing? What is power flushing?
Why power flush? Why power flush?
What else should I know? How much does it cost?
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Why should I power flush my system?

Power flushing is an effective measure to clean your central heating system including, pipework, radiators and throughout your cylinder and boiler. There are a number of benefits resulting from a power flush to your system but there are also a number of reasons of why you should consider a power flush in the first instance.


Reasons to power flush


boiler failure


Total boiler failure- If no other fault exists on your boiler but it still show problems it could over heating due to excessive heat build up caused by sludge and deposits restricting heat transfer. It must be noted that if your boiler has failed because of sludge due to not having a power flush your warranty will be void.




fuel wastage


Fuel wastage - In untreated boilers debris in the form of sludge, deposits, rust and scale deposits accumulates which restricts the flow of water and ultimately heat from reaching all parts of the system. This means lost heat, you will have to turn up your heating system to compensate which will cost you a lot more money.



pump valve seizure


Pump or valve seizure and failure - Black oxide sludge increases shaft and bearing wear which is the most common cause of sticking pumps or complete pump failure. A completely stuck valve could result in a cold radiator or at the very least a very inefficient one.




little or no hot water


Little or no hot water- This could be a result of blocked pipes and heat exchanger due to an excess build up of sludge or deposits.




cold radiators

Cold radiators - If your radiators are cold at the bottom but hot at the top this indicates sludge build up in your system. This is caused by a build up of iron oxide sludge at the bottom of your radiator (as the sludge is heavier than water) which results in a restriction of the flow of water.



air in radiators


Frequent venting and air at the top of radiators - Hydrogen, sometimes mistaken for air, is a by-product of electrolytic corrosion.




sludge and scale

Sludge and scale - Black Oxide sludge forms continuously in all unprotected central heating systems as a result of corrosion. It will also harden into scale on the hottest surfaces of a system (i.e the boiler heat exchanger causing it to make knocking and kettling noises). This also prohibits efficient heat transfer.


It must be noted that even if you are not currently experiencing any problems your system may still contain sludge and corrosion. If you can not vouch for the cleanliness of your system it is advised to get it checked to be safer than sorry.

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Benefits of power flushing


After your system has been power flushed it will benefit instantly- your system will really appreciate the new lease of life you have just given it! Internally your system will be running much more efficiently, effectively and cleaner, you may also notice immediate improvement externally such as reduced boiler noise or more heat in your radiators. It is perhaps the long term benefits that best describe the usefulness of power flushing:

benefits of powerflushing

  • Efficiency restored back to optimum levels
  • More reliable heating
  • Rust protected central heating system
  • Scale protected central heating system
  • Lower fuel bills (especially if system was previously very dirty)
  • Piece of mind

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cost of power flushingIf you would like to find out how much money it would cost to power flush your system please visit our power flushing costing's page.