The Rain Bird 3/4 in. FPT Inline Irrigation Valve minimizes pressure loss of dirt and debris during installation and system start-up. Operates automatically or manually with manual bleed screw. Works with any standard sprinkler timer. Designed for below-ground installation, out of sight and away from playful hands. Energy efficient, low power encapsulated solenoid with captured plunger. 1 in. female pipe thread inlet and outlet inline irrigation valve. Buna-N diaphragm offers superior performance in harsh water environments. Reliable, non-clogging design. Reverse Flow design reduces stress on diaphragm for dependable operation.