Product Description Rain Bird HV Valves 9V Ideal for residential irrigation systems that do not require the comprehensive features in the DV Valve series. Compactly constructed from a glass filled polypropylene body to give strength, and an electric diaphragm with a self cleaning pilot water filter and stainless steel spring give reliable operation. Features an external bleed screw and can be manually operated by a turn of the solenoid coil. To be used with battery controllers. Available in 1″ F BSP, 9V Click for Product Tech Sheet