Grundfos 98180249 SLV.40.A40.40.A.4.61J Wastewater Pump. The SLV Series Pumps are designed with SuperVortex (free-flow) Impellers, and serve as a powerful and efficient wastewater pump in a handful of functions that include; Inlet pumping stations, wastewater treatment plants, secondary clarification, residential and industrial applications. This Grundfos 98180249 SLV.40.A40.40.A.4.61J Wastewater Pump is loaded with multiple features designed to cut down on energy cost, and improve the overall performance and lifetime of the pump. These features include a body & parts constructed out of cast-iron and stainless steel, heavy-duty ball bearings greased for life, a self-cleaning single-channel impeller, and a service-friendly design for quick and easy maintenance. This pump is factory tested, and ideal for speed-controlled operation to keep the energy consumption at a minimum. This Pump Model is NOT Explosion Proof.