Simple design utilizes a 3-way solenoid valve that directly operates the main valve. Open quickly when the solenoid valve is activated. Manual override to open the valve regardless of solenoid valve position. Visual indicator for indication of valve position. Large supply drain port to drain inlet side piping-globe only. Pilot operated main valve. No adjustment necessary. Sizes: 1.25 - 4". ANSI flanged Class 150 or 300. Wide range of material available including those for seawater services.