JMF Company 5/8 in. Flare X 5/8 in. D Flare Brass Union - Ace Hardware

Anderson Metals 754046-1012 Tube Coupling, 5/8 x 3/4 in, Flare x FNPT, Brass - 5 Pack, MID Hardware

JMF Company 3/4 in. Flare Brass Cap - Ace Hardware

JMF 4331617 Yellow Brass Adapter 3/8 Flare x 1/2 FPT Dia. in. (Pack of 10)

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Sioux Chief Adapter 5/8 inch Outside Diameter Flare X 1/2 inch Male Fitting No Lead 1/Bg

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LASCO 17-6221 5/16-Inch Compression Brass Union : Everything Else

Anderson Metals 3/4 in. FIP in. X 3/4 in. D FIP Brass 45 Degree Elbow - Ace Hardware