This NIBCO PEX poly tee is designed for use with NIBCO PEX in potable water and radiant heating systems. The poly tee is made of PPSU polyphenylsulfone and features PEX end connections. This fitting allows a connection to be made in a continuous line of pipe and branch out to a different direction. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. NIBCO PEX fittings are lightweight, easy to install and maintenance-free. Joining can be accomplished with NIBCO copper crimp ring, copper sleeves, stainless steel sleeves, or stainless steel clamps. This 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.Features Maximum service temperature 200°F Third party certified to NSF-pw Complies with ASTM F877 Complies with ASTM F2159 CSA B137.5