What is the minimum size of a sanitary pipe that can pass through a foundation wall?

The minimum size of a sanitary pipe that can pass through a foundation wall is 4 inches, which aligns with the requirements set forth in the Massachusetts Plumbing Code. This standard is established to ensure adequate waste flow and prevent issues related to blockages or structural integrity of the foundation.

Using a 4-inch pipe ensures that there is sufficient capacity for waste removal from plumbing fixtures and helps to accommodate the clogging potential that may arise from the types of materials being discharged into the sanitary system. Smaller pipe diameters could lead to increased risk of backups, reduced efficiency in waste transport, and could compromise the overall integrity of the sewage system as it connects through the foundation.

Thus, 4 inches is not just a guideline but a practical measure to ensure proper functionality and longevity of the plumbing infrastructure within buildings.