The minimum size waste line for a floor sink is __________________.

The minimum size waste line for a floor sink is 2 inches. This requirement is established to ensure the proper function of the drainage system, allowing for sufficient flow and preventing blockages that can arise with smaller diameter pipes. A 2-inch waste line is appropriate for handling the volume of waste typically generated from floor sinks, which are commonly used in locations such as commercial kitchens and industrial settings where water and debris need to drain efficiently.

Using a waste line smaller than 2 inches could lead to inadequate drainage, potentially causing backups or slow drainage issues. Therefore, the 2-inch minimum size directly supports the goals of effective waste management and compliance with plumbing codes that prioritize functionality and safety in plumbing systems. The other sizes mentioned, while potentially useful in different applications, do not meet the minimum standard required for effective floor sink drainage as specified in the applicable plumbing codes.