CTS quick connect coupling (push type) for PEX, copper, CPVC, and potable plumbing pipe. Can be easily disconnected and reused without any tools. Approved for behind the wall and underground installations without the use of access panels (always check local codes). Holds up to 250 P.S.I. at 75 deg. F. IAPMO, NSF 61, CSA/ASTM and UPC Code Approved.