Wash fountains have a fixture unit rating of ________.

Wash fountains typically have a fixture unit rating of 2. Fixture units are a method of measuring the probable demand of plumbing fixtures in a drainage system. This rating helps to determine the overall capacity needed for the plumbing system based on the types and number of fixtures installed.

In the context of wash fountains, a rating of 2 fixture units is used because these fixtures often serve multiple users simultaneously, combining attributes similar to sinks and lavatories, which have similar demand characteristics. This rating reflects the average expected load that the wash fountain would exert on the drainage system, allowing the system to be designed appropriately to handle peak usage without risking overflow or inadequate drainage.

Understanding the fixture unit ratings is crucial for proper plumbing system design and ensuring compliance with local plumbing codes.