These photos show actual sewer ejector pump systems serviced and installed by Marc Francis Plumbing, including the basin, discharge piping, and system components.

How Does a Sewer Ejector Pump Work?

A sewer ejector system typically includes a sealed basin that collects wastewater from below-grade plumbing fixtures. As the wastewater level rises, a float or control activates the pump, moving the wastewater through a discharge line and into the building's main sewer system.

The system may also include a check valve, shutoff valve, venting, and an alarm. Because these components work together, a sewer ejector pump problem is not always caused by the pump itself.

Signs Your Sewer Ejector Pump May Need Repair

Problems with an ejector pump can quickly affect bathrooms, kitchens or other plumbing fixtures connected to the system. Common warning signs include:

• Pump Will Not Turn On: A pump that does not activate when the basin fills may have an electrical, float, control, or pump-related problem.
• Pump Runs Frequently or Continuously: A pump that runs more often than normal may indicate a float problem, check-valve issue, incoming water problem, or another condition that needs evaluation.
• Wastewater Backup: Toilets, sinks, or other fixtures connected to the ejector system may back up when the pump is not moving wastewater properly.
• Unusual Noises: Grinding, humming, or other changes in the way the pump sounds can indicate a mechanical problem or obstruction.
• Alarm Activation: If the sewer ejector alarm activates, the wastewater level in the basin may be too high. Avoid continued use of connected plumbing fixtures until the problem can be evaluated.
• Unpleasant Odors: Persistent sewer odors around the ejector basin may indicate a problem with the basin cover, venting, seals, or another component of the system.

Choosing the Right Sewer Ejector Pump

The appropriate pump depends on the plumbing fixtures being served and the conditions of the installation. Factors that may need to be considered include:

• Amount of Wastewater: The pump must be able to handle the expected wastewater flow from the connected fixtures.
• Vertical Lift: The distance the wastewater must be pumped upward affects the demands placed on the system.
• Discharge Piping: Pipe size, routing, and the overall installation can affect system performance.
• Residential or Commercial Use: A system serving a commercial property may have different demands than one serving a basement bathroom in a home.
• Existing System Conditions: When replacing an older pump, the basin, piping, valves, and controls should also be evaluated rather than assuming the pump is the only issue.

Preventing Sewer Ejector Pump Problems

Because sewer ejector pumps handle wastewater, problems are much easier to manage before the basin overflows or connected fixtures begin backing up. Pay attention to changes in pump operation, unusual noises, alarms, recurring odors, or fixtures that are no longer draining normally.

Items that should not be flushed or sent through the plumbing system can also create problems for pumps and sewer lines. Avoid flushing wipes, feminine hygiene products, and other materials that are not intended to break down in the sewer system.

Diagnosing Recurring Sewer or Ejector Pump Problems

If an ejector pump appears to be operating but wastewater problems continue, the issue may be elsewhere in the drainage or sewer system. Depending on the symptoms, additional evaluation such as a sewer camera inspection may help determine whether a blockage, damaged line, or another sewer condition is contributing to the problem.

Need Help With a Sewer Ejector Pump?

Whether you're dealing with a failed sewer ejector pump, an alarm, recurring backups, or planning a new below-grade bathroom or kitchen, Marc Francis Plumbing can evaluate the system and determine the appropriate solution.