The Electric Eel Model D-5 drain-cleaning machine functions as a continuous cable drum machine and can clean 3- to 10-inch diameter lines up to 100 feet and runs ¾-inch diameter Tri-Max cable. The high-density polyethylene drum and belt guard are designed not to rust or dent, according to the manufacturer. The unit is powered by a heavy-duty ½-hp capacitor-type motor to provide increased torque.