Where must cleanouts be located in relation to the building drain and building sewer junction?

Cleanouts play a crucial role in maintaining plumbing systems, allowing for easy access to the drainage lines for cleaning and inspection purposes. The placement of cleanouts in relation to the building drain and building sewer junction is governed by plumbing codes to ensure effective maintenance and prevent blockages from being difficult to address.

The correct answer, which states that cleanouts must be located at least 10 feet upstream from the junction of the building drain and the building sewer, ensures that any potential backups or clogs in the system can be easily accessed without the need to excavate or dismantle sections of the plumbing. This distance allows for enough room to perform any necessary cleaning tasks effectively, minimizing potential damage or disruption.

In contrast, cleanouts positioned within 5 feet downstream would not provide sufficient access for addressing clogs that could occur closer to the junction. Likewise, suggesting that cleanouts should only be located in the basement limits accessibility for maintenance and cleaning across other areas of the system. Random placement of cleanouts would lead to inefficiencies and challenges in locating them when maintenance is needed. Proper placement according to regulations is essential for the functionality and reliability of the plumbing system.