For what purpose is a cleanout used in plumbing systems?

A cleanout is specifically designed to provide access to a plumbing system for the purpose of clearing blockages within the pipeline. When a clog occurs, it can be challenging to remove the obstruction without an access point. Cleanouts are strategically placed at certain intervals in the plumbing system, allowing plumbers to easily insert tools, such as snakes or augers, to remove debris or blockages that are causing backups.

This access is crucial for maintaining the system's functionality and ensuring that wastewater flows freely. By facilitating direct access to the interior of pipes, cleanouts help prevent the need for more invasive and expensive repairs or replacements, thereby preserving the integrity of the plumbing system as a whole.

The other options provided do not accurately represent the function of a cleanout. While pipe installation, measuring pipe diameter, and connecting multiple pipes are all essential aspects of plumbing, they do not relate to the cleaning or maintenance purposes that cleanouts serve in addressing blockages.