Power Flushing, Jet Flushing, Hard Flushing and Chemical Power Flushing are all expressions used to denote the process by which central heating systems are forcibly cleansed using water at high velocity, but low pressure, so that no physical damage is caused to the system. The process can be made even more effective with the addition of powerful cleansing and mobilising agents.
The objective is to restore systems with circulation and boiler noise problems (caused by sludge and corrosion deposits) to optimum operation. Power flushing removes these deposits and the problems that they cause. After power flushing your system we will leave it working with fresh clean water and balanced with a corrosion inhibitor ensuring excellent operation. It is prudent to power flush a heating system immediately before fitting a new boiler to an existing system to prevent possible future problems. Many systems are found to contain corrosion and sludge, even if no flow problems have yet shown themselves.
Existing debris is often mobilised by alterations to the system/piping and the increased efficiency of the new boiler, and may then accumulate in the boiler heat exchanger, causing noisy operation, reduced efficiency and, in extreme circumstances, failure of the boiler. The high efficiency and compactness of modern boilers, developed to minimize fuel costs and pollution, means that they are more susceptible to problems caused by debris in the system water, mainly because of the finer designs of the new gas condensing heat exchangers.