When should cleanouts be installed in a building sewer?

Cleanouts are essential components of a building sewer system, providing access points for maintenance and cleaning. They are typically installed at regular intervals to facilitate easy snake access for clearing clogs and to allow for the inspection of the sewage lines. In the context of the given options, the correct standard is to install cleanouts every 50 feet.

This standard is based on the practical need to minimize the distance between access points for effective maintenance. By ensuring that cleanouts are positioned every 50 feet, installers can adequately manage any potential blockages that may occur in the sewer line and perform inspections without having to excavate long stretches of the pipe, which can be time-consuming and costly.

While other distances, such as 20, 30, or 100 feet, may exist in different contexts or regulations, 50 feet serves as a commonly accepted standard that balances accessibility with the structural integrity and design of the sewer system. This ensures both compliance with regulations and the practical functioning of the plumbing infrastructure.