About this item Great Compatibility-- The 004892 Effluent Pump Switch fits for Zoeller 50 and 90 series pumps, models including 53,55,57,59,97 and 98. Perfectly compatible with Zoeller 53-0001 Effluent Pump Automatic Operation-- Repair switch 004892 allows the pump to turn on and off automatically based on the water level. Prevent flooding and ensure that water is efficiently discharged Pump Protection-- By preventing unnecessary cycling and ensuring timely activation and deactivation, the switch reduces wear and tear on pump components. Enhance reliability and safety of the overall pumping system Water Level Regulation-- .