100% Compatible With All Leading Brands Of Push Fit Plumbing Fittings BS7291 part 1 & 2 . Push Fit Plumbing Barrier Pipe Coil Polybutylene 10mm x 25m Soft Flexible Pipe Grey ( always use lubricant & pipe inserts/stiffeners ) BS EN ISO 9002 & Conforms To BS7291 part 1 & 2. For Hot & Cold & Central Heating Systems So These PB Fittings Will Not Be Affected By Anti Corrosion Properties ie Sentinal & Furnox. Can Also Be Used on Copper When Adapting To Central Heating Systems .