.5 HP, Cast Iron, Submersible Sump Pump, With Vertical Switch, Designed For 11 inch Diameter Or Larger Sump Basin. Pumps Up To 4200 GPH @ 0 feet , Durable Cast Iron Volute, Reliable, Reinforced Poly Carbonate Impeller, Corrosion Resistant Stainless Steel Fasteners, Top Suction Design Filters Debris and Minimizes Clogging, Oil Filled, Thermally Protected Motor Prevents Overheating, Designed For Easy Installation Without Any Plumbing Changes, Epoxy Coated Steel, High Performance .5 HP, Motor, 1.5 inch NPT Discharge and Durable Cast Iron Base, Easy Carry Handle For Portability, Float Guard Protects Switch From Hang Ups.