SHURFLO®’s REVOLUTION™ fresh water pump design was created with a unique one-piece diaphragm and internal by-pass, assuring long life and top performance in all plumbing systems. Designed as the next legendary pump to exceed the expectations of our customers, the REVOLUTION™ Pump is built for high flow demand, low noise and no rapid cycling. SHURFLO®’s quality reputation has been built on the reliability and dependability of every pump we build. The 4008 REVOLUTION™ fresh water automatic demand pump is super quiet, thermally protected and can run dry without damage. Mounts in any position.