The RIDGID® K-7500 drain cleaning machine will clean drain lines 4 to 10 in diameter and up to 250 ft in length. The 4/10 hp universal motor spins 5/8 and 3/4 in cable at 200 rpm. When the cable hits the blockage, the motor gears down automatically to deliver greater power and enhance operator control. The molded polyethylene drum includes an inner drum that guards against cable flip over. An integral ground Fault Interrupter (GFCI) is built into the line cord and a kickstand base is provided for machine stability during operation. A pneumatic foot actuator provides on/off control of the motor. The drum powers a 5/8 or 3/4 in cable that has a quick change coupling system for connecting or disconnecting tools. The cable is fed in an out of the drain by a AUTOFEED® assembly at a rate of 0-28 ft/min.