What is the maximum distance allowed between cleanouts on a 4" or smaller pipe?

The correct maximum distance allowed between cleanouts on a 4-inch or smaller pipe is 50 feet. This requirement ensures that there is adequate access for maintenance and cleaning of the plumbing system. Cleanouts are essential for clearing blockages and performing inspections, so having them spaced appropriately within the specified distance ensures that plumbing professionals can effectively maintain the system.

Spacing cleanouts too far apart could hinder access in the event of a blockage, making it more difficult to address issues quickly and efficiently. The 50-foot rule is established within plumbing codes to provide a balance between accessibility and practical installation, allowing for effective system management without excessive numbers of cleanouts. This design consideration ultimately contributes to the longevity and reliability of the plumbing system while ensuring compliance with best practices in plumbing installation and maintenance standards.