Brand New Hunter 3/4" PGV-ASV Anti-Siphon Valve The ¾" inlet/outlet Hunter PGV-ASV anti-siphon, female-threaded valve offers highly reliable electric backflow prevention in standard irrigation applications. For maximum longevity, it has a convenient 6-bolt bonnet constructed from ultra-durable, glass reinforced nylon. The rugged, double-beaded diaphragm ensures leak-free operation for years of top performance. Features & details Provides simple, trouble-free operation without the need for a separate backflow preventer Works with battery-operated irrigation controllers and DC-latching solenoids Captive screws prevent loss of parts during installation and maintenance Built-in flow control maximizes efficiency and prolongs the life of the system