What is the minimum discharge pipe size from a sump or receiving tank for a sewage pump system?

The minimum discharge pipe size from a sump or receiving tank for a sewage pump system is crucial for ensuring proper wastewater flow and preventing clogs. A 2-inch discharge pipe is typically specified because it strikes a balance between allowing sufficient flow and minimizing the risk of blockages when dealing with sewage.

Sewage systems often handle solids as well as liquids, and a larger pipe diameter helps facilitate the movement of these solids through the system. A 2-inch pipe can accommodate typical sewage flow rates while reducing the potential for backup or slow drainage that smaller pipes might experience.

Choosing the minimum per manufacturer is technically sound in that manufacturer specifications must be adhered to for effective operation, but generic code requirements often establish a standard size to promote safety and efficiency across various systems. Thus, the 2-inch pipe size is often recognized as a reliable standard in plumbing codes, including the Omaha Plumbing Code, for ensuring adequate discharge from sewage systems.