Description Product Description Rain Bird JTVAS075 Jar Top anti-siphon valve, 3/4" inlet. Combination electric remote control valve and atmospheric backflow preventer in one unit. Features threaded "Jar Top" lid which quickly unscrews without tools allowing you to easily access the diaphragm for effortless maintenance and cleaning. For use with any 24 volt AC irrigation timer/controller. A unique reverse-flow design helps prevent flooding in the event of internal diaphragm failure keeping the valve closed and saving water. This valve can be used with all types of watering devices including Rain Bird spray heads, rotors, and impacts. From the Manufacturer: Rain Bird manufactures only the highest quality Anti-Siphon valves. Anti-Siphon valves are installed above ground and will prevent back flow if properly installed. Anti-Siphon valves should always be installed at least 6" above the highest head on the valve line, and should never have another valve installed further down the line from the main valve. Our Anti-Siphon valves also feature our patented vacuum breaker–available for automatic or manual applications. Flow control models regulate the flow of water to sprinklers to avoid misting. All of our Anti-Siphon valves work with any standard sprinkler timer. Buna-N (nitrile rubber) diaphragm with water filter and captive spring offers superior performance in harsh water environments. Features an energy-efficient, low power encapsulated solenoid with captured plunger. Heavy-duty construction with stainless steel screws. Use Anti-Siphon valves in locations where the use of a pressure vacuum breaker (PVB) or a double-check valve is required by city codes to protect against back flow. Check your local city codes to determine what type of valves are required. 3/4" female pipe thread (FPT) inlet and outlet. Meets I.A.P.M.O. and A.S.S.E. listing specifications. Canadian Standards Association approved. **Also available (sold separately) in 1” model: JTVAS100. Rain Bird “The Intelligent Use of Water” From the Manufacturer Rain Bird�s Jar-Top Anti-Siphon valves combine the newest in Jar-Top technology with the reliability of anti-siphon protection. The Jar-Top bonnet quickly screws on without using any tools. This allows you to easily access the diaphragm for effortless maintenance and cleaning. Rain Bird manufactures only the highest quality Anti-Siphon valves. Use Anti-Siphon valves in locations where the use of a pressure vacuum breaker (PVB) or doublecheck valve is not required by city codes. Check your local city codes to determine what type of valves are required. Anti-Siphon valves are installed above ground and will prevent back flow if properly installed. Anti-Siphon valves should always be installed at least 6� above the highest head on the valve line, and should never have another valve installed further down the line from the main valve. All of our Anti-Siphon valves work with any standard sprinkler timer. Features and Benefits: Easy cleaning and maintenance with one-piece jar-top lid. Rain Bird exclusive fail-safe design. Heavy duty, professional design for a life-time of trouble-free operation. Flow control models regulate the flow of water to sprinklers to avoid misting. Operates automatically with any standard 24 volt sprinkler timer. Vacuum breaker prevents backflow contamination to keep drinking water safe. Meets I.A.P.M.O. listing specifications. External bleed to manually flush system of dirt and debris during installation and system start up.