Coupling is copper to copper with stop. Complete with a sweat/solder fitting.
CPLG, W/STOP CXC 3/8"$0.99
CPLG,CXC 1/2" X 3/8"$2.29
5/8 FLARE X 1/2 FIP ADPT.Call for Price
3/4 X 1/2 BUSHING SOLVENT X THRD$1.79