Milton S-1062 Pressure Switch, 140-175 PSI Pressure Switch, 140-175 PSI. Universal pressure switches replace pressure switches on compressors up to: 2 HPat120v 1 phase, 3 HP at240 V 1 phase or 5 HP at240 V 3 phase. 3 HP at 240V 1 phase. UL listed, CSA certified.