What is the maximum distance between cleanouts located on a horizontal drain?

The maximum distance between cleanouts located on a horizontal drain is set to 100 feet, which is established by plumbing codes to ensure proper access for maintenance and inspection. Cleanouts are crucial components in a plumbing system, as they allow plumbers to remove blockages and maintain the drainage pipes effectively.

Having a cleanout too far apart would make it challenging to address issues such as clogs or repairs, potentially leading to more extensive problems or costly repairs down the line. Therefore, the stipulation of a 100-foot maximum ensures that access points are within a reasonable distance for effective plumbing service while maintaining the integrity and functionality of the drainage system.

The other distances presented in the options do not meet the requirements set out in plumbing codes, where 100 feet is recognized as a standard maximum to promote both accessibility and efficiency in managing horizontal drainage systems.