The Anti-Siphon Valve with Wheel Handle provides valuable backflow protection, protecting your water supply. With a sturdy flow control stem, full-size waterways guard against low-pressure loss. This product is not designed for consistent pressure applications. This Anti-Siphon Valve with Wheel Handle by Arrow protects your water supply by providing important backflow protection. Flow range is between 5-35 GPM. Operating pressure varies between 25-150 PSI. A reliable brass anti-siphon valves with backflow prevention in the toughest of jobs. This product is not intended for constant pressure applications.