The Jenny 140-1077 2HP Pressure Switch helps control compressor operation by monitoring system pressure and regulating when the motor starts or stops. Designed for a 120–150 PSI pressure range, this switch works with the compressor’s electrical and pressure-control system to maintain the desired operating range. The integrated unloader helps release pressure from the pump head during ... https://www.wholetoolbox.com/jenny-140-1077-2hp-pressure-switch-120-150-psi-unloader-lvr-pcvl/140-1077.html