Will the UltraHeat® Tank Heater damage the holding tank if little or no liquid is in the tank when the UltraHeat® Tank Heater is “ON”?
In most all cases, NO, the UltraHeat® Tank Heater will not damage any type of holding tank. If the outside temperature is below 44° F (7° C) and the UltraHeat Tank Heater is “ON” with little or no liquid in the black or gray holding tank, the tank heater will possibly create sewer gas that may give off odors. This said, some liquid must always be present within the tanks when using the UltraHeat system.