Cash Acme U518A Shark Bite Push-Fittings End Cap, 3/4-Inch A connection system for Copper, CPVC or PEX Pipe , this item cannot ship to CA or VT Instant push-fit connection for increased ease-of-use Fittings certified to 200 PSI and 200-Degree Fahrenheit Fits copper tubing and CTS CPVC and PEX Integral tube liner for PEX installations