A water closet in an establishment serving liquor is rated as what number of waste units?

In the context of plumbing and wastewater management, the number of waste units assigned to fixtures helps in determining the overall waste load for a plumbing system, which is crucial for proper design and sizing of sewage and drainage systems. A water closet, commonly known as a toilet, has specific criteria for waste load based on its expected usage, especially in establishments where liquor is served.

In establishments such as bars, restaurants, or clubs that serve liquor, the demand on sanitary sewer systems can be significantly higher due to increased patron activity and liquid consumption. As a result, the waste load for these fixtures increases to accommodate for the higher volume of usage.

A water closet in such an establishment is rated at six waste units. This rating reflects the additional demand placed on the plumbing system because of the expected higher frequency of use, leading to more significant waste production. Understanding this rating can help ensure that plumbing systems are designed to handle peak loads efficiently, preventing issues such as backups or failures in the sanitation system.

The other options represent lower ratings, which do not accurately account for the anticipated demand in a liquor-serving environment, thus making six waste units the appropriate and justified choice in this context.