Things don't always fit together perfectly, but you can always adapt. Like adapting gas lines with brass fittings, specifically 1/2 male to 1/2 male
Brass Fitting - HMPHMP 1/2 Male to 1/2 Male Pipe Thread
1/2 x 2-1/2, Pipe Fitting, Red Brass Nipple, lead free compliant product which meets California ab-1953 & Vermont sb-152 legislation certification.
Pipe Fitting, Red Brass Nipple, Lead Free, 1/2 x 2-1/2-In. -38300-0825
PVF, Brass
EZ-FLO 1-1/4-in x 1/2-in Compression Coupling Fitting in the Brass
SharkBite 1/2 in. Push x 1/2 in. Dia. Push Brass Coupling
Brass Pipe Fittings, Brass Fittings
BrassCraft 3/4-in x 1/2-in Threaded Reducing Union Coupling Fitting in the Brass Fittings department at
Sioux Chief 1/2 inch Lead-Free Brass FPT x FPT Coupling
2 NPSH Male X 2 9/16 Bowl Coupling (For Black Ribbed Hose
Midline Valve RSC2334 Compression Coupling Fitting
Brass Extension Pipe Fitting G1/2 x G1/2 20mm Adapter Connector
Straight Coupling Brass 1/2 in End B Diameter Threaded Fittings for sale