Square D - FSG2J20M4CP Pressure Switch, Grey Cover The square D Pumptrol by Schneider electric water pressure switches have been providing rugged, reliable performance for over 67 years. These switches are designed to control electrically driven water pumps and air compressors. They can be used for jet pumps, submersible pumps and Reciprocating pump applications. Features 20-40 PSI Pumptrol(TM) Water Pressure Switch with Low Pressure Cut-Off Suitable for jet pumps, submersible pumps and reciprocating pumps Low Pressure Cut-Off; Standard-action contacts open on rising pressure 20 - 40 psi 1/4 in. pressure connection USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.