Pack of 10) EFIELD PEX 1/2" x 1/2" Male Sweat Copper Adapter (Inside
1/2" Tube to 3/8" Tube Compression Adapter
QuickFitting 1/2 Inch Push to Connect Coupling | Patented Design for Superior Sealing | Push On Brass Plumbing Pipe Fitting | for Copper, PEX and CPVC | 5-Pack - Amazon.com
Male Compression Fitting - 3/8 in. Tubing x 1/2 in. Pipe #12-8309
1/4" Tubing X 1/2" Male NPT Brass Compression Adapter - Greschlers Hardware