Kat's, 1000w, circulating tank heater constantly 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 & in farm & ranch applications such as a stock tank heater 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.