The SJE Rhombus 122 Duplex alternating sewage pump systems have a control panel for single phase units with override. They are designed to alternately control two 120, 208, or 240 VAC single phase pressures in water and sewage pump installations. The alternating action equalizes the units wear. In addition to the alternating mechanism control, these systems provide override control should either part fail. If an alarm condition occurs, an alarm switch activates the audio and visual alarm system. Common applications include unit chambers, lift stations, sump basins, and irrigation systems. The standard package for this sewage pump includes three 20 foot Sensor Float control switches, and a 3 year limited warranty.