Magnetite sludge removed from a central heating system during a power flush. The black iron oxide deposits have been drawn onto a magnet, clearly showing the level of contamination that had built up within the system. Left untreated, this sludge causes reduced efficiency, cold spots on radiators, noisy boilers, and premature pump failure. A thorough power flush and the installation of a magnetic filter helps protect the system and keeps it running at peak performance.
