CTS quick connect stackable (stem x quick connect) tee (push type) for PEX, copper, CPVC, and potable plumbing pipe. Stem end of tee pushes into the end of other quick connect fittings. Eliminates the need to cut small lengths of pipe to join fittings. Can be easily disconnected and reused without any tools. Approved for behind the wall 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.