The Wayne 1/3 HP cast iron pedestal sump pump features a rugged, reliable cast iron volute and can replace most submersible pumps without any plumbing changes. U.S.A. Flow (GPH): 3,100, HP: 1/3, Min. Basin Needed (in.): 11, Volute: Rugged cast iron volute, Impeller Shaft: Reinforced poly-carbonate impeller Corrosion-resistant steel column and stainless steel fasteners Heavy-duty air-cooled motor with 1 1/2in. discharge Can replace most submersible pumps without plumbing changes Adjustable vertical float allows homeowners to change the operating cycle to fit their application Designed for 11in. diameter or larger sump basins