Formerly PROTEX by Purimachos EVERBUILD P14 SYSTEM INHIBITOR is a multi-purpose treatment, specifically designed to protect the entire central heating system from scale, sludge and corrosion. *WRAS Approved formulation. *BuildCert Performance Standard *Compatible with all EVERBUILD central heating products. *Does not contain mineral oil. *compatible with plastic and fibreglass header tanks and with all metals used in central heating systems which includes iron, copper, steel, brass and aluminium. *Suitable for microbore systems constructed from plastic pipes. *New and existing central heating systems. *Extensions to existing systems.