Rain Bird JTV-AS-075 Anti-Siphon Irrigation Valve. This irrigation valve uses a 3/4" female pipe thread (FPT) inlet and outlet and is compatible with any standard irrigation controller. This Anti-Siphon Irrigation Valve should be installed above ground and at least 6" above the highest head on the valve line. These valves are compatible with most standard irrigation controllers/Timers. Rain Bird is renowned for its high quality products proven to make a dramatic improvement with all your irrigation projects, and the Rain Bird JTV-AS-075 Anti-Siphon Irrigation Valve is no exception. Rain Bird's Jar-Top Anti-Siphon technology provides easy internal accessibility to help maintain and clean moving parts that can become worn or dirty over time.