General Pump 100438 Thermostat. The 100438 Probe Style Thermostat has a 16(4)A - 380V Electric Rating & can handle up to 4,000 PSI. Includes Insulated Stainless Steel Capilary Copper Immersion Bulb - UL/CSA approved. Features: Electric Rating: 16(4)A - 380V Max. PSI: 4000 Temperature: 86-194 Degrees Fahrenheit