Kat's KAK13100 Circulating Tank Heater, 1000WConstantly moves fluid through the heater element to keep liquids from freezing. Can be used on agricultural equipment to keep antifreeze warm which results in warmer engine start reducing wear. Can also be used in farm & ranch applications to keep water troughs from freezing in cold weather. Thermostatically controlled 135 degrees 175 degrees. Uses versatile strap mounting system, moderate mechanical ability required to install. 1000W Constantly