Unisex toilet rooms must contain how many lavatories and water closets at maximum?

The requirement for unisex toilet rooms to have one lavatory and two water closets aligns with the goal of ensuring adequate facilities for users while maintaining the balance of plumbing fixtures. This setup allows for more efficient use, especially in high-traffic areas, by providing an additional water closet that can accommodate users simultaneously if the demand arises.

Having one lavatory is generally sufficient, but when it comes to water closets, two facilitates better access and can help reduce wait times, which is particularly important in locations such as offices, public buildings, or event spaces where people may need to use facilities quickly during peak times. This balance is essential for ensuring that the plumbing system can serve the needs of occupants adequately without creating bottlenecks during busy periods.