SharkBite 3/4 in. Push-to-Connect Brass Slip Coupling Fitting U3016LFA - The Home Depot
Amazon.com: SUNGATOR 3/4 Inch Slip Coupling, Repair Coupling, No Lead Brass Push to Connect Plumbing Fittings to Connect PEX, Copper, CPVC, PE-RT, With A Disconnect Clip, Pack of 3 : Industrial &