What is the branch size associated with a urinal in a trough configuration?

The correct branch size associated with a urinal in a trough configuration is 1 1/2 inches. This size is commonly specified in plumbing codes and standards for draining urinals effectively while preventing clogging and ensuring proper flow. A 1 1/2-inch branch is typically adequate to manage the wastewater from multiple urinals, which is essential for maintaining the plumbing system's efficiency and functionality.

Larger sizes such as 2 inches or above may be used for other fixtures or in different contexts where a greater volume of flow is expected, but for a urinal in a trough setup, the 1 1/2-inch diameter strikes the right balance between function and compliance with plumbing regulations. This knowledge is essential for plumbers to ensure that installations meet code requirements and operate efficiently.