Square D Pumptrol Wiring Diagram. The pressure switch is a pumptrol fsg2j21m4 (has the additional lever) the. Run a cable from the pressure switch to the motor. square d pumptrol wiring diagram from wirepartlynn101.z13.web.core.windows.net Square d well pump pressure switch wiring diagram | well pump pressure. Wiring pressure switch pump diagram square control cut low […]