HCSW Ltd power-flush, if necessary, all new boiler
systems we install to prevent possible future problems, and
because more and more boiler manufactures insist on it now
as part of their warranty terms.

Most heating systems, after running normally for some time, contain corrosion and sludge - a semi-solid deposit resulting from the reaction between the water in the system and the steel in the radiators. Eventually these deposits build up to such an extent that the water flow through the system, or parts of it, is significantly impeded, or excessive boiler noise is caused, or repeated pump failures occur, or all three!

Symptoms of corrosion.

1. One or more radiators are completely or partially cold.
2. The radiators require frequent bleeding of collected gas.
3. The boiler clumps and bangs, especially at start-up.
4. The central heating header tank is warm (or even hot!).
5. Central heating pump failures.
6. Black water from radiators when emptied or bled of air.

At the end of the power-flushing process, the system contains fresh clean water. An inhibitor is is always added as the final procedure to slow down dramatically further corrosion. Reinstatement of the system to normal operation takes only a few minutes.