A shower room having 8 multiple shower valves shall be served by a minimum __________ inch drain.

To determine the minimum drain size required for a shower room with multiple showers, it is important to consider plumbing codes and standards that relate to drainage capacities.

In the case of a shower room with eight shower valves, the demand on the drainage system would be significant, as each shower can discharge a considerable volume of water simultaneously. The 2-inch drain size is adequate because it is classified to handle the flow generated by multiple shower valves, ensuring proper drainage and reducing the risk of clogs or backflow.

A drain size of 2 inches is commonly specified in plumbing codes for similar configurations, as it is designed to accommodate the effective drainage needs of multiple fixtures while allowing for practical installation and maintenance. Larger sizes, like 3 inches or 4 inches, while capable of handling the flow, may not be required by code for such a setup, making the 2-inch option the minimum acceptable size for proper waste removal.

Understanding these codes is essential for compliance, safety, and functionality in plumbing systems.