The TripleSafe Sump Pump System gives you triple the Protection and is the world's most reliable pumping system. If pump 1 fails: pump 2 takes over. If pump 1 can't keep up: BOTH pumps 1 and 2 operate-a total of 6,200 gallons per hour. If power fails: pump 3, a battery operated "UltraSump", takes over.