AUP033-6 1/3 HP 115V Automatic Sump Pump, 2160 GPHAutomatic on off: Built in smart electronic sensor, Acquaer automatic submersible water pump will automatically turns on when 1 1 2'' water is detected; turns off when water level falls below 1 4'' Remove Water Efficiently: 1 3 HP submersible utility pump moves up to 2160 gallons per hour. Bottom suction design filiters debris and removes water down to a depth 1 4''. Great for removing water from pools, pool covers, hot tubs, flooded house basement