Orbit 3/4" NPT, 150 psi., In-Line Electric Sprinkler Control Valve. It is designed for 24 Vac sprinkler systems and features a reverse flow design that mitigates potential damages or waste from free flowing water if a diaphragm ruptures. A manual on/off bypass lever allows for testing and flushing of the sprinkler lines. Soft-close design reduces water hammer and wear on the system, while captured lid screws, solenoid plunger, and attached diaphragm spring make maintenance easy. Replaces all major brands of sprinkler valves. For use with outdoor cold water irrigation systems.