Where are trap cleanouts prohibited?

Trap cleanouts are prohibited in concealed traps primarily due to accessibility and maintenance considerations. Concealed traps are typically installed in areas that are not readily visible or accessible, such as within walls or under floors. This lack of access can create significant challenges for maintenance and cleaning, which is why plumbing codes often require that traps be accessible for easy cleaning and inspection.

If a trap is concealed, it would hinder the ability to perform routine maintenance, inspections, or emergency interventions. Therefore, regulations aim to ensure that all plumbing components, including traps, are installed in a manner that allows for easy access and minimizes complications in case of blockages or repairs.

In contrast, traps located in public restrooms, open traps, or exterior drains are generally designed to be more accessible, allowing for proper maintenance and cleaning without the same challenges presented by concealed installations. Traps in these situations typically do not face the same restrictions due to their positions being more convenient for routine service.