Power Flushing is a process by which 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 cleaning agents (CHEMICALS)
Are your radiators cold?
Power flushing removes these deposits and the problems that they cause. 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.