Why do systems need power flushing? There are many thousands of ageing central heating systems with circulation & boiler noise problems caused by accumulations of sludge, corrosion deposits and scale, but traditional methods of flushing just don’t get rid of all the debris and problems can often quickly return.
The use of chemical mobilising agents followed several days later by “repeat drain down” procedures is invariably very labour intensive, requires at least two visits & often not completely effective.
No matter how good the flushing agent used, the flow rate as system water trickles out through ordinary drain valves means that some debris settles back in the systems, with the result that problems return again in short order.
The alternative method, removing individual radiators, is equally time consuming, very messy, and has no effect on deposits in pipe work and elsewhere in the system.
Some of the symptoms which indicate that a heating system could benefit from a power flush are:
- Radiator water is dirty and discoloured.
- System is slow to warm up.
- Some radiators are partially or completely cold.
- Radiators need frequent bleeding.
- ‘Kettling’ noises from boiler.
- Repeated pump failures.