Square-D 20/40 Pressure Switch 9013FSG2J20. The pressure switch starts and stops the pump motor automatically at a predetermined pressure. A tube connects the switch to some point in the system on the discharge side of the pump. The pressure in the system then acts directly on a diaphragm in the switch, which in turn actuates the contacts in the switch.
- Water Systems
- Standard pressure setting: 20 PSI cut-in , 40 PSI cut-out
- Maximum pressure setting: 40 PSI cut-in, 70 PSI cut-out