Dixon CV050 Brass Spring-Loaded Check Valve, 1/2" NPT Female
Spring-loaded check valve with NBR seat. Made of brass. Flow profile designed to minimize head loss. Soft seat for bubble tight shutoff, spring loaded for fast seating action. Cracking pressure: 0.50 psi. Temperature range 10 to 210 degree F. Underwriters approved. 1/2" NPT female. Rated to 400  psi pressure.