Fire Hose Rack Nipple, Brass, 1 1/2 Inches Male NPT x 1 1/2 Inches Male NST. To create a valve-mount assembly, combine pin rack with brass rack nipple and brass angle valve, sold separately. To create a wall-mount assembly, combine pin rack with wall-mount bracket, brass rack nipple, and brass angle valve, sold separately. Optional pin rack cover is designed for valve or wall mount assemblies. Only accepts single-jacket pin rack fire hose.