20-40 PSI Well Water Pump Pressure Switch Adjustable Double Spring Pole Water Pump Pressure Switch Features: - Suitable for 1 phase or 3 phase (15 or 230 volt / at 115 volt 1 phase it will handle 1.5 hp, at 230 volt 1 phase it will handle 2 hp, and at 230 volt 3 phase it will handle 3 hp.) - Preset on pressure: 20 psi / the contacts close at this pressure to send power to the motor / pump. - Preset off pressure: 40 psi / the contacts open at this pressure to shut power off to the motor / pump. - Adjustable pressure: Instructions are under the lid of the pressure switch on how to adjust pressure. - Min pressure: 20 psi Water Pump Pressure Switch can be wired for 1 phase or 3 phase. - 15 or 230 volt / at 115 volt 1 phase it will handle 1.5 hp, at 230 volt 1 phase it will handle 2 hp. Water Pump Pressure Switch Specification: Type: 20-40 PSI Well Water Pump Pressure Switch Water Pump Pressure Switch Material: Plastic shell, Cast Iron Water Pump Pressure Switch Color: Grey shell Water Pump Pressure Switch Connection: Female 1/4 NPT Water Pump Pressure Switch Max pressure: 40 psi Water Pump Pressure Switch Min pressure: 20 psi Water Pump Pressure Switch Net Weight: 11.4oz (322g)