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If you have to disconnect hoses with any degree of regularity, you should consider Quick Disconnect couplings. They provide fast, positive, leakproof connections for air, liquids and dry products. They connect and disconnect in seconds without tools; simply lift the cam levers. The female fittings use a standard NBR gasket where they meet the male fitting for a cushioned, leakproof seal, and are supplied with safety pins. Stainless steel cam arms.
All parts are manufactured to meet or exceed MIL Spec C27487 and dimensionally conform to MIL Spec A-A-59326A, and they will interchange with couplings manufactured to the same standards (excluding 1/2"). Made in China.
Polypropylene ratings at 70°F (21°C):
125 psi on 1/2" to 1"
100 psi on 1 1/4" to 2"
75 psi on 3"
60 psi on 4"