Over time radiators corrode creating debris and sludge which cause restrictions in the system, and blocking valves and boilers which can lead to system failure. By periodically power flushing the system with a power flushing machine, in combination with specialist cleaners, the full efficiency of the system can be recovered. A power flush will remove black sludge overcoming circulation problems and can help to cure boiler noise and boiler scaling. Once clean a corrosion inhibitor will be added to the system, in addition, why not ask us about adding Fernox F6 a chemical product designed to improve the heat transfer efficiency in the central heating system.