Zoeller 161-0017 Model M161 High Head Effluent Pump 0.5 HP 115V 1PH 35' Cord AutomaticZoeller Model M161 High Head Effluent Pump Description Our Model M161 automatic Effluent Pump is designed to remove effluent or ground water in effluent applications. The 1 2 HP M161 is a time tested and reliable effluent pump. The white polypropylene float is solid so it cannot become waterlogged. This ensures that it is always buoyant and able to turn the pump on when necessary. The pump's vortex impeller allows it to pass 3 4" spherical solids. The