Check the listing for details. Hydro-Rain HRA Series Anti- Siphon Valve. Condition: New. Listed at 41.27 USD. Hydro-Rain is the commercial division of Orbit so when you purchase a Hydro-Rain product, you will get all of the same reliability and product confidence you have come to expect from Orbit. HRA Series with Anti-Siphon Valve is Hydro-Rain's all-in-one valve. Anti-siphon valves keep your drinking water free from contaminants by restricting backflow. The HRA Series ASV is a tough but easy to use valve you can depend on for protecting your water source. The rugged design and construction includes a glass filled polypropylene lid for withstanding all weather conditions including the harsh heat of the sun. The HRA with anti-siphon valve meets IAPMO, ASSE, and CSA standards. Anti-Siphon valves must be installed at least 6" above the highest sprinkler or drip emitter in your system.Features:Anti-siphon design keeps water downstream of the valve from siphoning back into the water source Double seal TPR diaphragm ensures years of reliable performanceStainless steel metering system ensures continual cleaning action every time the valve turns on or offBuna-N valve seat seal provides positive closure preventing leaksFlow control to precisely meet the needs of your system Manual internal bleed allows manual ON/OFF operationCompatible with HRC 990 battery powered controller for operating in remote locations