Master Plumber 176958 Zinc & Plastic Sump Pump w/ Tethered Float Switch, 1/3 HPMaster Plumber 1 3 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 3,600 GPH (gallons per hour) and features a tethered on off float switch. Switch Type: Tethered Horse Power: 1 3 HP GPH: 3,600 Thermoplastic construction resists corrosion