hat is boiler power flushing? Water always has some air trapped in it, and when this air gets into the heating system, it can corrode the insides of the pipes that are generally made from galvanized iron. This produces iron oxide that becomes a sludge that finds its way into radiators and other parts of the system. This sludge can stick to surfaces and reduce the flow of water, and lead to failure of heat exchangers, radiators valves, pipes and even pumps that are used by the system to circulate the hot water. This not only reduces the efficiency of heating but can lead to the wasting of ay fuel or energy source used by the boiler. Boilers may use oil, gas, or electricity for producing the needed heat. Power flushing allows for cleaning the entire system so that it is restored to its original state.