VPC 1/2 in. CPVC-CTS Slip x Slip Coupling Fitting (10-Pack) 26-M512111001-10 - The Home Depot
Amazon.com: SUNGATOR Check Valve, 1/2 Inch Push-to-Connect, 2-Pack Push Fit Plumbing Fittings with Disconnect Clip, No Lead Brass PEX Fittings for Copper, PE-RT, CPVC Pipe : Automotive