Building sewer cleanouts must be installed at intervals not to exceed how many feet in straight runs?

Building sewer cleanouts must be installed at intervals not to exceed how many feet in straight runs?

• A. 50 feet
• B. 100 feet
• C. 150 feet
• D. 200 feet

Answer: (B)

Cleanouts are installed to provide access for cleaning and removing blockages in the building sewer. To keep maintenance practical, codes limit how far apart cleanouts can be placed in straight runs so you can reach the line with standard cleaning tools. In straight sections, the maximum allowed distance between cleanouts is 100 feet. If runs were longer, you’d risk an inaccessible section that you can’t effectively clean from a single cleanout. That’s why 100 feet is the expected interval. Shorter distances would add unnecessary cleanouts, while longer distances would not meet the code requirement.

Cleanouts are installed to provide access for cleaning and removing blockages in the building sewer. To keep maintenance practical, codes limit how far apart cleanouts can be placed in straight runs so you can reach the line with standard cleaning tools. In straight sections, the maximum allowed distance between cleanouts is 100 feet. If runs were longer, you’d risk an inaccessible section that you can’t effectively clean from a single cleanout. That’s why 100 feet is the expected interval. Shorter distances would add unnecessary cleanouts, while longer distances would not meet the code requirement.