In a residential plumbing system, what is the primary purpose of a cleanout?

The primary purpose of a cleanout in a residential plumbing system is to provide access for clearing blockages. Cleanouts are strategically located points in the plumbing system that allow plumbers to insert tools, such as snakes or augers, to remove clogs or obstructions that can develop in the pipes. By providing easy access to these areas, cleanouts facilitate the maintenance and repair of the plumbing without requiring extensive disassembly or excavation.

While cleanouts may indirectly support the maintenance process, that is not their primary function. Also, they do not provide structural support for pipes or regulate water pressure, as those are roles fulfilled by other components in the plumbing system. Understanding the correct purpose of cleanouts helps ensure that plumbing systems are maintained effectively and can address any potential issues promptly.