The RCVS Series Spring-Loaded Check Valve is designed and manufactured for use in piping systems where a possibility of back-siphoning exists, primarily from an upper pool level to a lower pool elevation.  They are installed on display and filter piping systems.  The RCVS Series is a  machined cast bronze body,  with disc holder and tail piece to ASTM-B584,  a bronze spring, a  BUNA disc, and threaded (F) N.P.T. end connections. It is available in six (6) sizes ranging from 1/2″ to 2″.  Please refer to the cut sheet for additional technical data. Documentation & Downloads 3.714 RCVS Series Spring-Loaded Check Valve Cad File DWG | 4 MB 3.714 RCVS Series Spring-Loaded Check Valve Cut Sheet PDF | 148 KB