What is the primary reason for installing a cleanout in a drain system?

The primary reason for installing a cleanout in a drain system is to allow access for cleaning and maintenance. Cleanouts are strategically placed access points in plumbing systems that provide a way to clear blockages or perform maintenance on waste lines. When a blockage occurs, it is essential to have direct access to the drainpipes to effectively remove the obstruction without causing damage to the plumbing or requiring extensive excavation.

This access point also enables inspectors to inspect the condition of the pipes and address any potential issues before they escalate into significant problems. The ability to maintain and clean drains efficiently contributes to the overall functionality and longevity of the plumbing system, ensuring that wastewater flows smoothly and reducing the likelihood of backups and related issues.

While other options may touch on different aspects of plumbing systems, they do not address the primary and most critical purpose of cleanouts in the same way that maintenance and cleaning access do.