Solenoid Valve with Manual Operator Solenoid Valve with Manual Operator Valve Ways and Positions 2-Way/2-Position Normally Closed Media - Valves Air Inert Gases Light Oil Water Pipe Size - Valves 3/4 In. Min Operating Pressure Differential 5 psi Max Operating Pressure Differential Air/Inert Gas 125 psi Max Operating Pressure Differential Light Oil 125 psi Max Operating Pressure Differential Water 125 psi Indoor Outdoor Voltage 120VAC Coefficient of Volume 5.00