Our Model WM49 Sump Pump is designed to remove unwanted groundwater in basement sump applications. The 1/4 HP ''Water Ridd'r'' Model 49 is a fully automatic float-operated sump pump. The WM49's tethered float switch utilizes a mechanical float switch for operating the pump. This is a time-tested method of controlling the pump. The Model 49 is a compact option for small sump pits.The Model 49 pump is constructed with a cast iron motor housing. This enables it to withstand the most demanding basement sump applications. The corrosion resistant engineered plastic vortex impeller has a smooth surface allowing water and solids to pass freely through the pump. All of the Model 49's hardware is made of high-quality stainless steel. All of these features highlight the fact that it was designed with longevity in mind balanced by price.Every 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.