Water Source PSL3050 Pressure Switch, 30/50 psi Working

The 30/50 psi low pressure switch signals the pump to start when the water system drops to a preset low pressure (e.g. 30 psi) and stop at high-pressure mark (e.g. 50 psi). If the pressure drops rapidly, the switch will automatically shut-off the pump. This switch is to be used with submersible well pumps or as a replacement switch.