What is the minimum GPM for a residential ejector pump?

The minimum gallons per minute (GPM) rating for a residential ejector pump is 20 GPM as this capacity is designed to handle typical residential wastewater loads effectively. Ejector pumps are utilized in plumbing systems where wastewater needs to be transported upward to a sewer line or septic system, particularly in basements or lower levels of a home. A pump with a 20 GPM rating can efficiently manage the flow from various fixtures, preventing backups and ensuring proper drainage.

This rating assists in ensuring that the system can handle peak usage times, such as during showers or laundry, where multiple fixtures may discharge simultaneously. Choosing a pump with a lower rating could lead to performance issues, as it might not be capable of handling the volume of wastewater being generated, potentially leading to overflow or pump failure.

In contrast, higher ratings, such as those found in some other choices, may be unnecessary for typical residential applications, creating extra cost without providing added benefit. Therefore, 20 GPM is viewed as an effective compromise between efficiency and necessary performance for most residential ejector pump applications.