QuickFitting 3/4 inch x 1/2 Inch Reducing Coupling | Patented Design for Superior Sealing | Push to Connect Brass Plumbing Pipe Fitting | for Copper, PEX and CPVC | 5-Pack - Amazon.com
Proline Series 1/4-in x 1/4-in Threaded Coupling Fitting in the Brass Fittings department at Lowes.com