For Central Heating Systems

What is Power-flushing?

Power-flushing will clean a central heating system internally and in particular improve radiator performance and heat output. Put simply, it’s rather like vacuum cleaning the inside of your radiators & boiler; only using a mixture of water & a cleaning fluid we pump & flush out the insides of your heating system.

The following problems can all be solved:

Cold Radiators

Cause: Sediment of iron oxide sludge accumulating at the bottom of radiators restricts the flow pattern.

Frequent Venting, Cold Spots near Top of the Radiator

Cause: Hydrogen, sometimes mistaken for air, is a by-product of electrolytic corrosion. It is flammable and can be identified easily.

Sludge and Scale

Cause: 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 or banging noises called- ‘kettling ’). This prohibits efficient heat transfer. Boiler manufactures will not guarantee your new boiler installation if the system is not chemically cleaned. The British Standards and the Benchmark demand that the system should be thoroughly cleaned.

Boiler Failure

Cause: Assuming no other faults exist, the insulating effect of accumulated deposits of sludge and scale can restrict the transfer of heat to such an extent that the boiler overheats and fractures!

Fuel Wastage

Cause: In untreated heating systems, corrosion debris accumulates in the boiler and, in hard water areas (London) lime-scale will form. The insulating effect of these deposits reduces heat transfer to the circulating water. 3mm of lime scale deposit on the heat exchanger will add 18% to your fuel bill. It is in the current British Standards requirements that prior to boiler change, the system must be cleaned, power flushing is the best way to achieve a proper well done job.

Pump Seizure & Failure

Cause: Black Oxide sludge, being abrasive and magnetisable, increases shaft and bearing wear which is the most common cause of sticking pumps and pump failures.


All of the above problems can be easily solved by the power-flushing of your system. Upon request, we can even e-mail you an animation to further explain what we are describing.

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