CFPC-9 20A1.5hp automatic pressure control switch voltage/Frequency:240V/50HZ,115V/60HZ current/power:12A/2HP, 20A/1.5Hp 1.5hp 20A Automatic pressure control switches Rated voltage/Frequency:240V/50HZ,120V/60HZRated current/power:17A/3HP, 20A/1.5HP Joint screw:1/4" Min Pressure(on):20 psi Max pressure(off):175psi