Plug the end of PEX pipe with a crimp or clamp connection. Corrosion-resistant fitting certified for use in potable water and hydronic heating system applications.Corrosion-resistant fitting made from high-performance acudel polymerConnects to PEX pipe with copper crimp rings or stainless steel clamp ringsMinimum working temperature 33 deg F at 160 psi and maximum working temperature 200 deg F at 80 psi