Master Plumber 176952 Zinc & Plastic Sump Pump with Vertical Switch, 1/2 HPMaster Plumber 1 2 HP Submersible Sump Pump is constructed from zinc and thermoplastic materials. These materials, combined with stainless steel fasteners and hardware, protect the pump from corrosion, extending the life of the pump. This pump offers a maximum pumping capacity of 4,200 GPH (gallons per hour) and features a vertical on off float switch that can be used in smaller sump basins. Switch Type: Vertical Horse Power: 1 2 HP GPH: 4,200