By monitoring the water level and controlling the water supply, the pressostat helps prevent overflows and other problems that could damage the appliance or pose a safety risk. Water Pressure Switch Wiring Pressure Switch Adjustment | Pump Control Dish Washers Machines Pressure Switch Water 95/70 With 4 Contacts For Washing Dishwasher Machine Washing achine Filter Lint Screen Original Code 142370 182430 for... Proper installation and operation is essential to ensure proper operation of the pressostat. 371275 WASHER WATER LEVEL PRESSURE SWITCH OEM **FREE 1 YEAR WARRANTY The pressostat has four contacts for connection and overflow 380., Maximum pressure is 95 psi and minimum pressure is 70 psi.