Cash Acme U3016A Shark Bite Push-Fittings Slip Coupling, 3/4-Inch A connection system for Copper, CPVC or PEX pipe , this item cannot ship to CA or VT One end of the coupling has a stop, allowing the other end to slide freely over the end of a pipe The push-fitting can be release with a disconnect tool and slide back onto the other end of the pipe for successful leak repair Easy quick push-fitting connectors CTS Copper Slip couplings should only be used on Copper