This product is designed to handle raw, unscreened sewage, effluent and large volumes of surface and process water. With its S-tube impeller, the extended range enables free passage of solids up to five inches. Self-adaptive controls allow the pump to adjust to changing operating conditions, while high-efficiency motors meet or exceed global standards. The pump series is designed with IE3 premium efficiency motor components, quick removable pump housing clamps, cartridge seals, quick removable plug-in cord and smooth exterior components along with an easy-to-service pump. The SL range is designed for submerged use, while the SE range accommodates both submerged and dry installations. Grundfos.