Hardware Made Easy!
Various
1/2" white schedule 40 pvc check valve, threaded, stainless steel spring loaded pvc poppet with neoprene seal, rated at 200 psi at 72 degree Fahrenheit, complies with ansi b2.1, not for use with compressed air.
Genova Products Insert Fittings 2 Steel Insert Coupling
Eastman 3/8 in. OD Stainless Steel Gas Connector - FIP x MIP
Sharkbite Brass Crimp Male Sweat Adapter
BK Products Brass 3/4-in FIP x 3/4-in FIP Gas Valve
Forney Drain Cock/Comp Tank 1/8 in NPT