20-40 PSI Well Water Pump Pressure Switch Adjustable Double Spring Pole Water Pump Pressure Switch Features: - Fitted phase: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 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)