Brass fittings from Anderson Metals are suitable for a variety of harsh environments - Hose Assembly Tips
Everbilt 3/8 in. Compression Brass Sleeve Fittings (3-Pack) 801109 - The Home Depot
Advantages of Brass Pipe Fittings For Domestic Plumbing Fixtures
Amazon.com: SUNGATOR 1/4" Brass Fittings, Air Hose Fittings, 90 Degree Barstock Street Elbow, Hex Nipple Coupling Pipe Fitting Set, 1/4" x 1/4" Female Pipe,1/4" x 1/4" Male Pipe, 1/4" Male x 1/4"
Solid Brass Fittings Male Flare Hex NPT Nipple Flare NPT Elbow Flare Union Tee | eBay