Flotec Back-Up Sump System, Outlet Connection Size: 1-1/2 in, Pump Voltage Rating: 115 VAC, Back-up Voltage Rating: 12 VDC, 1/2 hp, Pump Maximum Head: 22 ft, Back-up Maximum Head: 15 ft, 4200 gph, Back-up Flow Rate: 2700 gph, Battery Type: AGM, Thermoplastic/Zinc, Temperature Rating: 32 to 70 deg F, Suitable for: Flotec BAT40, BAT75 AGM Batteries