Zoeller 161-0011 Model F161 High Head Effluent Pump 0.5 HP 230V 3PH 20' Cord NonautomaticZoeller Model F161 High Head Effluent Pump Description Our Model F161 nonautomatic Effluent Pump is designed to remove effluent or ground water in septic or effluent applications. The 1 2 HP F161 is a time tested and reliable effluent pump. The F161 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