Compression coupling that provides the ultimate in pipe connection flexibility. Accepts the following pipe: PEX, CTS Polyethylene, Copper, PVC, IPS OD PE, Lead, ABS, Galvanized, and Stainless Steel. Designed to fit a wide range of different diameters on most materials. Simply witness mark the pipe against the flange on the fitting and then insert the pipe to the correct depth. No special tools are needed - the nut can be tightened using a wrench. No scrap value unlike brass fittings. Made from advanced thermoplastic materials. Corrosion-resistant, ensuring a long service life. Safety-composite construction means there is no leaching of heavy metals. No sharp edges.