Our Model N163 nonautomatic Effluent Pump is designed to remove effluent or ground water in septic or effluent applications. The 1/2 HP N163 is a time-tested and reliable effluent pump. The N163 is a nonautomatic pump requiring a piggyback float switch or control panel for operation. Either option allows you to set the on and off point of the pump in the field. This is ideal in an application with a deep sump pit or pump tank.The pump's vortex impeller allows it to pass 3/4'' spherical solids. The impeller's clearance in relation to the pump housing allows water and solids to pass freely through the pump. This combination of design features lessens the chance of clogging and downtime.The Model 163's motor housing, pump housing, and base are each constructed of cast iron. The pump's identification tag, handle, and hardware are made of non-corrodible stainless steel. This attention to detail ensures that the Model 163 is able to withstand the most demanding sewage ejector applications.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.