A partition is required between _________?

In plumbing and building codes, a partition is specifically required between a urinal and a lavatory (sink) to ensure adequate privacy and to maintain hygiene standards. This separation is important because it keeps two types of fixtures that serve different purposes conceptually distinct from one another.

Urinals are typically used for male patrons and are more exposed than lavatories, which are used for handwashing and personal hygiene. By requiring a partition, building codes help prevent any potential cross-contamination or privacy concerns that could arise in a restroom setting.

The other scenarios—such as between a water closet and a urinal, a water closet and a lav, or a shower and a lav—do not have the same stringent requirements in many plumbing codes. While partitions might still be preferred for privacy in some designs, the code explicitly mandates the partition only between a urinal and a lavatory.