Which of the following fixtures is NOT included in the minimum requirement for single-family dwellings?

The answer is correct because a bidet is not considered a minimum fixture requirement for single-family dwellings according to plumbing codes. The minimum fixture requirements typically include essential items that provide basic sanitation and convenience for daily living, such as water closets, kitchen sinks, and washing machine basins.

Water closets are necessary for sanitation, serving as the primary means of waste disposal. Kitchen sinks are essential for food preparation and cleaning, while washing machine basins are required to facilitate laundry activities.

In contrast, a bidet, while beneficial for personal hygiene, is viewed as an optional plumbing fixture that does not meet the fundamental needs of a household. Consequently, it is not mandated by plumbing codes for the minimum number of fixtures in a single-family dwelling. This understanding highlights the difference between essential plumbing infrastructure and additional comforts in home design.