The Zoeller M98 Sump Pump is designed to remove unwanted groundwater in basement sump applications. The professional-grade, 1/2 HP M98 is the industry standard when you need a higher flow sump pump.  Known as the "Flow-Mate" M98, it is a fully automatic float-operated sump pump. This pump comes standard with the Zoeller LED Plug that allows you to check for power at a quick glance. The white polypropylene float switch is solid so it cannot become waterlogged. This ensures that it is always buoyant and able to turn the pump on when necessary._x000D_\n_x000D_\nThe Model 98 is a cast iron sump pump, with the switch case, motor housing, and pump housing all constructed of cast iron. The corrosion resistant engineered plastic vortex impeller has a smooth surface allowing water and solids to pass freely through the pump. The pump's identification tag, float guard, handle, switch arm, and hardware are made of non-corrodible stainless steel. This attention to detail ensures that the Model 98 is able to withstand demanding, high flow basement sump applications._x000D_\n_x000D_\nEvery pump is submerged in water and tested to its published performance curve, ensuring it meets your expectations and delivers peace of mind right-out-of-the-box.