Rust occurs in all central heating systems producing a black (iron oxide) sludge and, in hard water areas, lime scale builds up in combination boilers just like in your kettle. Power flushing or descaling your central heating systems removes rust and guarantees the efficient operation of heating systems, saving homeowners money on bills. Power Flushing central heating systems provides long term protection.
Er, he's closing the valves.... :-)
thereisawizza 1 year ago 3