Double check
A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.
Classification: Check valves of materials other than copper, iron or steel
NSN 5915-01-521-7194
NSN 5910-01-443-3016
NSN 5945-01-557-2558
NSN 6620-01-580-5864
NSN 5945-01-330-5318
NSN 6650-01-254-3690
NSN 6685-01-113-8005
NSN 6145-01-352-4913
NSN 5920-01-135-9261
NSN 5920-01-004-4107
NSN 6145-01-079-0869
NSN 6320-01-564-0893