Amazon.com: Joywayus 1/2" Female 3/4" Male Soild Brass Water Tank Connector Theaded Bulkhead Fitting With 2 Rubber Ring Stablizing : Industrial & Scientific
Made my first pipe out of all brass : r/StonerEngineering
Mid-America Fittings - A Brass Fittings Manufacturer
Brass Gas Fittings, Gas Valves & Nipples, Propane Tank Gas Fittings | Tejas Smokers
Proline Series 5/8-in x 1/2-in Compression x Fip Adapter Coupling Fitting in the Brass Fittings department at Lowes.com
Anderson Metals - 54048-0808 Brass Tube Fitting, Half-Union, 1/2" Flare x 1/2" Male Pipe: Amazon.com: Industrial & Scientific