1-1/2" galvanized union. Malleable galvanized iron pipe fittings. Fed. Spec. WW-P-471-B, ANSI B-16.14 (Dimensions), ANSI B-2.1 (Pipe Threads), Ferrous Plugs, Bushings, and Locknuts, Fed. Spec. WW-P-471-B, ANSI B-16.14 (Dimensions), ANSI B-2.1 (Pipe Threads), Malleable Iron Unions (Class 150), Fed. Spec. WW-U-531C, ANSI B-16.39. Size: 1-1/2", Material: Malleable Iron, Finish: Black & Galvanized, Pressure Rating: 150 Steam or 300 Cold Water Oil Or Gas No. 8700163655: Size: 2", Material: Malleable Iron, Finish: Black & Galvanized, Pressure Rating: 150 Steam or 300 Cold Water Oil Or Gas