Grundfos 96846966 Unilift AP50 Submersible Wastewater Sewage Pump. 136 GPM, 49' Max Head, Vortex Impeller Stainless Steel Impeller. 2" NPT Discharge, 25' Cord, 220-230 Volt, 1 Ph (Single Phase), Automatic operation (with float switch), 2" Maximum Solids Size.