What Is a Sewage Ejector Pump and When to Service

A sewage ejector pump is designed to move wastewater from a basement, pit, or other area where plumbing can’t rely on gravity. Unlike standard gravity drains, these systems “lift” sewage to a higher discharge point—often into a main sewer line or a utility drain—using a pump plus sensors that control when it turns on and off.

In many homes, an ejector pump supports fixtures such as toilets, sinks, showers, and laundry that are installed below the sewer line. Because it handles mixed waste and must operate reliably to prevent flooding, it’s important to understand what it is and how to recognize when it needs servicing.