Spring Check Valves

Spring check valves, available in brass, bronze & stainless, have a poppet that hold the spring in place. When pressure is put on the inlet side of the valve, it forces the poppet to open and the spring to contract. When the pressure subsides, the spring forces the poppet closed. These types of check valves can be installed both vertically and horizontally. 

Spring check valves include NPT (National Pipe Thread) connections on both ends and they are installed directly into the piping system. The main reason to include a check valve in your system is to extend the efficiency and life of your pump.