This item cannot be shipped to the following state(s): GU,PR,VI
The Basement Watchdog Big 1/2 HP Combination Sump Pump System is designed to provide both primary and battery-backup pump capabilities. The primary system pumps 4,400 GPH at 0 ft. of lift and 3,200 GPH at 10 ft. of lift, and the backup system pumps 2,500 GPH at 0 ft. of lift and 1,730 GPH at 10 ft. of lift. The primary pump will operate as long as it is receiving AC power. If power is interrupted or if more water is coming into the sump than the AC pump can handle, the backup pump will begin pumping automatically.