SUBMERSIBLE CAST IRON SUMP PUMPS are automatic pumps used to remove groundwater from sump pits. The most common application is for basement drainage to prevent flooding in residential buildings or aid in removing standing water limiting exposure of Zika virus in residential areas. The Blue Angel F33S 1/3 HP "Professional Series", Cast Iron housing submersible sump pump is ideal for use in rugged applications. The oil-filled, high-efficiency motor is equipped with durable smooth ball bearings and integrated Vertical Float Switch. The Blue Angel brand of residential pumps provides sump, sewage, utility and other residential pumps known for durability and reliability.CONSTRUCTION Assembled in the US with foreign and domestic parts Tested to 1 million cycles* Cast Iron Pump Housing/Base with Top Suction Intake to Filter Debris and Minimize Clogging Corrosion-Resistant Thermoplastic Engineered Flow Diverter, for Switch Protection Stainless Steel Upper and Lower Float Guard and Float Guide Corrosion-Resistant Thermoplastic Impeller for Maximum Water Flow, and Long Life in Tough Sump Applications. 1-1/2 in. NPT Discharge for Easy Installation and Compliance with Building Codes Engineered to Pass Up to 1/2 in. Solids For Use In 11 in. Diameter or Larger Sump Basins 10 ft. SJTW Power Cord SWITCH Two-Pole Snap-Action Integrated Mechanical Float Switch ON @ 9 in. / OFF @ 4 in.SEALS Carbon / Ceramic Shaft Seal for Maximum Life MOTOR 120 Volt, PSC Oil-Filled Motor Upper and Lower Ball Bearings for Smooth, Quiet Operation and Long Life Continuous Duty Capability Low Amp Draw for Maximum Switch Life Voltage 120 volts No Batteries Required. We recommend you check your sump pump for proper operation at least once a year. Make sure the pump is plugged in to a working ground fault circuit interrupter (GFCI) outlet and the cord is in good shape. In damp areas, GFCI breakers may trip, effectively shutting off the sump pump.