What is the minimum discharge size for a sewer ejector pump in single-family dwellings?

The minimum discharge size for a sewer ejector pump in single-family dwellings is 2 inches. This specification is crucial because a discharge size of this diameter is generally sufficient to effectively transport sewage and wastewater from the basement or lower level of a home to the main sewer line without causing clogs or backflow issues. A 2-inch discharge line provides a good balance between flow capacity and the ability to handle solid waste, meeting code requirements designed to ensure safe and efficient wastewater management.

Smaller discharge sizes, such as 1 inch, would likely lead to insufficient flow rates, increasing the risk of blockages and system failures. Conversely, discharges larger than 2 inches, while capable of handling more flow, may not be necessary for a typical single-family dwelling and could lead to unnecessary costs in materials and installation. Therefore, adherence to the 2-inch minimum ensures compliance with plumbing codes and optimal performance of the ejector pump system.