Central heating systems may require a power flush every few years. This is because as the heated water moves around the system it reacts with the metal, and creates debris, which floats around the system. This eventually turns the water into a thick sludge which can make the flow of water around the system difficult and blocks radiators and other parts of the heating system.
Power flushing will improve the efficiency of a heating system, and help heating get to all parts of the system by clearing sludge and build up in the radiators and pipe work. Power flushing may be necessary to meet manufacturers warranty requirements for new boilers.
The sludge can put extra pressure on a boiler and pump, which means it uses more energy to heat the water in the radiators, and can cause boiler problems. It is for this reason that many boiler manufactures ask that the system be flushed prior to installation – as a criteria of their warranty.
If a power flush is required, then special chemicals are used by a trained engineer to flush out the system. Magna clean filters can be fitted to the pipework to help keep the system clean afterwards, although a little more expensive the Magna filters will save you money in the long term and maintain the high efficiency of a system.
A powerflush is usually completed in one day, however the chemicals should be added a few days before as this improves the effectiveness of the powerflush; this normally takes about half an hour.
On completion of every job a Power Flush Certificate will be provided. This will include information about what chemicals have been used, and which corrosion inhibitor has been left in the system.