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 &
3/4" Copper Press-Fit Slip Coupling (No Stop) - PEXhouse.com
Generic SharkBite 3/4 Inch Slip Coupling, Push to Connect Brass Plumbing Fitting, PEX Pipe, Copper, CPVC, PE-RT, HDPE, U3016LFA