HotLine Internal Sewer Pipe Heaters install inside the pipe through a Y-fitting clean-out above the floor. In-pipe installation eliminates the need for costly excavation, pipe wrapping, and rebuilding of basement floors and floor drains. The transformer operates on a 120-volt, 15-amp circuit, providing energy-efficient, NEC-compliant, low-voltage output to the heating element. The heating element’s low operating temperature makes it safe for PVC, copper, ductile iron, steel, cast iron, polypropylene and polyethylene pipe. They work for both water and sewer lines as well as commercial applications from animal waterers to pipelines to cooling towers, sump pumps, and refrigeration condensation lines. 877/881-2980; www.hotlineinternalpipeheater.com.