Does your system need a Power Flush?

Power Flush Central Heating Suffolk

You know your heating system needs a Power Flush when…

•    Your system takes longer heating up than before
•    Rooms are colder in your house
•    Radiators have cold patches
•    Your boiler is noisier than before
•    Radiators require bleeding more often
•    You’ve seen an increase in your gas bill
Power Flushing is the answer, if you are not sure what it entails, read on to find out more.

The Problem

Blocked radiator black sludge

The above listed are common occurrences as the result of black oxide sludge. This black sludge is typically known as iron oxide which is mainly ‘rust’ that has broken or fallen away from the inside of the radiators or other components of your central heating system. The sludge usually settles toward the bottom of the radiator and is the reason why yours at home are burning hot at the top and luke warm at the bottom, hence the cold patches. As a result, your heating system works harder to reach the ideal temperature, which is why the gas bill has increased.
The Regulation: England and Wales building regulations requires a central heating system to be cleaned/flushed before an inhibitor chemical is added, this is to be carried out during the commissioning of central heating systems.


Power Flushing

The Power Flushing process is usually required by many leading boiler manufacturers in order to validate their warranties and only when the procedure has been carried out to the standard of the UK building regulations before the new boiler is installed. Over time the black sludge that has built up in your central heating system will prevent the radiators from heating up properly and left untreated it can reduce the life span of your entire system. If you do not know how old your system is and you are experiencing the above listed problems, it is time to arrange for your system to be checked and cleaned.
The process can involve:
•    Water pumped and cycled at around 100 litres per minute
•    High strength cleansing chemicals to loosen/break up the hardened deposits
•    A rubber mallet can be used to dislodge any stubborn deposits
•    System should be flushed with fresh water until all chemicals are neutralised
•    An inhibitor should be added


To prevent the black sludge occurring in a freshly cleaned/new system, an Inhibitor should be added to slow down oxidation forming and attaching to the lining of radiator in the first instance. All inhibitors has a long life span, providing the system does not loose water and is well maintained, it should stay in effect. We recommend that an inhibitor is added after every power flush, much like oiling the chain on your bike after a deep clean. Some Power Flushing service provider will offer this inhibitor as an add-on, at JCW Saunders, we always include the inhibitor within the Power Flush quote. Important note to remember is that adding an inhibitor to a an already dirty system will not clean nor protect the system as it should.

Magnetic Filter

central heating magnetic filter

For further prevention and ease of all future power flush processes, ask your plumbing company about installing a Magnetic Central Heating filter. Here at JCW Saunders, we are approved installers to a wide range of well-known filter brands including MagnaClean® by Adey. The powerful Magnet in the casing of the filter pick up any metal deposits travelling back into the central boiler, preventing it from going through and damaging the inner works of the boiler; like the heat exchanger. Important note to remember is that these filters are not instead of the power flush, and work at their best only when the system has gone through de-sludging recently.
If you have any more questions with regards to the cleaning and maintenance of your boiler system, JCW Saunders can answer your questions, leave us a note in the Quick Enquiry Form to the right.