RPS-L&H and RPS-R&R surge-anticipating valves from Singer Valve are installed downstream of the pump check valve(s) and feature two pilots. The 106 RPS-L&H valve, mounted in a tee, is designed to anticipate surges to avoid severe water hammer. The valve may require a flow limiter set during commissioning to ensure the valve will reclose. The 106 RPS-R&R valve is designed for applications where static pressure is less than 100 feet and where the existing valve size may be too large. Unlike the RPS-L&H, the RPS-R&R is guaranteed to close, even if the valve is oversized. 888/764-7858; www.singervalve.com.