Central Heating Flush recommends the chemical cleaning of a central heating system which has a build up of unwanted materials such as sludge and limescale inside. These materials build up naturally over time due to the constant flow of water through the central heating system, causing rusting. These materials put pressure on the central heating system, driving up running costs as it has to work harder, and can also lead to blockages which cause the central heating system to breakdown.

Chemical cleaning is most effectively carried out with a power flush machine, but chemical cleaning products can also be applied manually. When manually applied, chemical cleaning products will need to be left in the central heating system for a few weeks with the central heating system left on as they work best warm. The system will then need to be drained and the radiators disconnected and rinsed through at low pressure with a garden hose, before reconnecting them and refilling the system, which may also need to be re-pressurized.

A power flush uses chemical cleaning products much more effectively, taking between 4 and 8 hours to complete depending on the size and condition of the central heating system. There is less disruption caused by power flushing with chemical cleaning products, as in most cases each radiator does not need to be disconnected first. The power flush machine is connected to the central heating system, usually at the tails of a radiator, and pumps water and the chemical cleaning products through the whole central heating system at high velocity to dislodge the sludge and limescale. The water and chemical cleaning products are pumped at low pressure to prevent damage to the central heating system during the chemical cleaning. The unwanted materials flow out to a filter and once all removed, water with no chemical cleaning products this time, is pumped through so that only clean pH neutral water is left in the central heating system.

The chemical cleaning of a central heating system is recommended by Central Heating Flush to prevent many of the most common problems with systems such as unusual boiler noises, the boiler or radiators becoming slow to warm up, radiator cold spots or fluctuating hot water temperature. If a new boiler is being fitted to an existing central heating system, then the chemical cleaning of the existing system with a power flush first is essential to ensure the warranty of the new boiler is valid. Also, for a system which is 10 or more years old and has not had any chemical cleaning before, it is wise to carry out a power flush as a lot of unwanted materials will have built up in this time.

The easiest way to check if a central heating system requires chemical cleaning is to bleed a radiator; dirty or cloudy water indicates the build up of unwanted materials and chemical cleaning is recommended.
Central Heating Flush engineers are all fully qualified and experienced to carry out the chemical cleaning of a central heating system, and to conduct a boiler service or install TRV’s and maganclean filters, which we supply. Our services are available to all home owners, landlords, estate agents and property maintenance agencies in London and the surrounding areas. If you would like to book chemical cleaning or any of our other services, call us today on 0208 9516 825 | 03333 200 468, or fill in the contact us form on our website and a member of our team will get back to you shortly.