What is your interpretation of a public or private use for plumbing? Say my office restroom for example. We have 2 restrooms, one for women and one for men. Each have locks, so they're intended for a single occupant. The office is not intended for the public off the street to enter to use as opposed to a restaurant that serves the public. 218.0 Private or Private Use Applies to plumbing fixtures in residences and apartments , to private bathrooms in hotels and hospitals, and to restrooms in commercial establishments where the fixtures are intended for the use of a family or an individual.