Shower rooms having more than two shower stalls shall provide which of the following near the stalls?

In shower rooms with more than two shower stalls, the requirement to provide a two-inch floor drain near the stalls is essential for maintaining proper hygiene and safety. A two-inch floor drain helps to ensure adequate drainage of water, preventing pooling that could lead to slippery surfaces and potential accidents.

With multiple users and high water flow, it's critical to manage the excess water effectively. The size of the drain is designed to handle the volume typically produced during showers, promoting a cleaner environment. Additionally, this drainage helps to manage wastewater effectively, reducing the chance of odors or mold growth that could arise from stagnant water.

The other options may contribute to the functionality of a shower room, but they do not address the critical needs of drainage and safety in the same way. For instance, a towel rack may provide convenience but does not solve the water accumulation problem, while a mixing valve ensures water temperature control, and a shower curtain offers privacy but does not contribute to drainage.