SHURFLO 4048-153-E75 High Flow 4 GPM Multi-Fixture Automatic Demand Pump The next pump in the by-pass Flow Reaction Technology Series, this pump has a unique one-piece diaphragm and internal by-pass to assure smooth flow, long life and top performance in any plumbing system Designed and built for high flow, low noise, smooth flow with no rapid cycling and SHURflo reliability, this fresh water demand pump is quiet and can run dry without damage Mounts in any position This pump is designed to replace both the 4900 and 5900 Smart Sensor series products