Product Description The WAYNE CDU1000 1 HP Submersible Sump Pump is designed for powerful and dependable basement water removal. Built with heavy-duty cast iron and corrosion-resistant stainless steel construction, this high-capacity pump moves up to 6,100 gallons per hour to help protect against heavy storms and groundwater buildup. The integrated vertical float switch ensures reliable automatic operation while fitting in tighter sump pits. A top suction design helps prevent air lock and clogging without the need for a weep hole, making installation straightforward. Assembled in the USA and backed by a 5-year warranty, the CDU1000 delivers long-lasting durability and reliable performance. From the Manufacturer The Wayne CDU1000 submersible sump pump can move up to 5400 gallons per hour (gph) at 10 feet of discharge lift. The top suction design filters debris and minimizes clogging. It is a rugged, stainless steel and cast iron submersible sump pump. This pump is designed for 11-Inch diameter and larger sump pits. Intended for Indoor Use Only.