Rain Bird CPF-100U Universal In-Line Automatic Sprinkler Valve with Flow Control, Fits Both 3/4" or 1" Pipe 3/4" or 1" inlet and outlet In-Line valve with flow control, works with any standard sprinkler timer Designed for below-ground installation out of sight and away from playful hands Operates automatically or manually with manual bleed screw Reverse Flow design reduces stress on diaphragm for dependable operation Energy efficient, low power encapsulated solenoid with captured plunger