Suburban Mfg Water Heater Thermostat Switch 140 deg F. The majority of RV water heaters use a thermostat to control the temperature. When your water heater's out you want one that you can count on to keep your water clean and hot when you need it most. You can always depend on the Suburban MFG Thermostat Device to do its job leaving you with clean fresh water for showers and sinks full of suds. Keep your utility bills low by using the Suburban Mfg Thermostat Device Features of Suburban Mfg 232319 Water Heater Thermostat Switch 140 deg F Designed for use with RV water heaters Temperature Rating: 140F Voltage Rating: 12V 90 day limited warranty Package Contents: Suburban Mfg 232319 Water Heater Thermostat Switch 140 deg F Suburban Mfg 232319: Water Heater Thermostat Switch 140 deg