Pipe Heating Cables heat a water pipe to prevent it from freezing in the cold winter months. Our heat cables come in lengths from 3 feet up to 100 feet long. Each cable comes with a thermostat that will turn the cable on and off when necessary. Once the pipe heating cable is wrapped around the pipe, we must insulate over the pipe and cable to provide energy efficiency to the heating cable. One inch thick fiberglass pipe insulation will allow the heating cable to heat the water in the pipe rather than the air around the pipe. Visit us at www.BuyInsulationProductStore.com for more info.