The NIBCO® PEX poly swivel adapter is designed for use with NIBCO® PEX in potable water and radiant heating systems. The poly swivel adapter is made of PPSU polyphenylsulfone and features a PEX x straight pipe thread end connection. This fitting provides a means of adapting a threaded connection to a PEX connection NIBCO® PEX fittings are lightweight, easy to install and maintenance-free. Joining can be accomplished with NIBCO® copper crimp ring, copper sleeves or stainless steel sleeves. The NIBCO® PEX system requires fewer fittings than traditional rigid plumbing systems resulting in fewer potential leak paths. NIBCO® PEX tubing, fittings, valves and manifolds are designed to be used as a complete system and are backed by a NIBCO® INC. limited warranty.