The TripleSafe Sump Pump consists of three pumps. The 1st pump is a 1/3 hp Zoeller M-53 that does most of the pumping. In the instance that Pump 1 cannot keep up or it fails, pump 2 takes over. Pump 2 is a Zoeller M-98 1/2 hp High Volume Pump. Coupled with pump one they can remove up to 6200 gallons of water per hour. The third pump is the UltraSump Battery Back-up Pumping System which is a DC operated pump that kicks on if power fails.