Profile: N & N International is a manufacturer of fire protection products. Our product line includes sprinklerheads, sprinklerhead accessories, valves, backflow preventers, fire hose, fire hose accessories, fire extinguishers, fire department & hose products, waterflow sprinkler products, pipe fittings and heat detectors. Our SPS200 is the automatic standard automatic glass bulb sprinklers. Our model CVA groove / groove swing check valves are designed for use in piping systems where it is necessary to permit flow in one direction and prevent flow in the opposite direction. The check valves are used in fire department connections, gravity and pressure tank connections, public water supplies to sprinkler and standpipe systems. Our model CVA swing check valve has a lightweight high density cast iron body with a solid bronze, rubber faced swing clapper. Check valves are gravity operated and may be used for both horizontal & vertical installations. The valve body has ½" NPT connection at the bottom of the check valve inlet for a ½" ball drip valves.