Spears® utility swing check and spring assisted utility spring check valves offer a compact, high performance check valve for Landscape and Irrigation, Pool and Spa, Aquaculture, OEM and many general purpose applications. These maintenance free sealed units feature long-life EPDM elastomer seats with weighted disc for full-flow with minimal restriction and positive shutoff. Spring assisted ''Spring Check'' model incorporates a positive-pressure spring to assist in valve closing without slamming. Produced from PVC White or PVC Clear material with Socket, Threaded or SR Threaded end connectors. Available in IPS sizes 1/2 in through 8 in for swing check valves and 1/2 in through 4 in for spring check valves.