Professional Central Heating Flushing Services   If your radiators have cold spots at the bottom, your boiler sounds like a boiling kettle, or your bleed valves are spitting out black water, your heating system is choked with magnetite sludge. Ignoring it isn’t an option. That abrasive black sludge destroys pump bearings, blocks heat exchangers, and … Continue reading Central Heating Flushing Lincolnshire