When installing sewer piping larger than 4 inches, what is the minimum size for the required cleanout?

The minimum size for the required cleanout when installing sewer piping larger than 4 inches is 4 inches. Cleanouts are essential in plumbing systems as they provide access for inspections and maintenance, allowing blockages to be cleared effectively.

For piping systems with larger diameters, the cleanout needs to be appropriately sized to ensure that it can accommodate potential blockages and allow for the efficient passage of tools and equipment during maintenance. A 4-inch cleanout is specifically designed to match the diameter of the piping, ensuring that any debris or buildup can be removed without restriction. This standard helps to maintain the efficiency and functionality of the sewer system.

Smaller cleanout sizes would not provide sufficient access for maintenance procedures in larger diameter pipes, as they may restrict the tools used for clearing blockages or create additional points of vulnerability in the plumbing system. Thus, the choice of a 4-inch cleanout aligns with established plumbing codes and best practices for larger sewer piping installations.