Brass 22 mm spigot x 3/4" BSP taper male adaptor. Hep2O® push-fit plumbing system for hot and cold water, and central heating (except where stated). The fittings are for use with unplated copper or plastic tube. They are not suitable for use on stainless steel, or chrome plated copper tube. Never use flux or jointing compounds with Hep2O® pipe or pipe fittings. Fully inserted Hep2O® Smartsleeve pipe support sleeves must be used on all installations when using Hep2O® plastic pipe. Hep2O® conforms to the requirements for 'Class S' applications as set out in BS 7291.