Rhode Island Journeyman Plumber Practice Exam

A commercial food waste grinder should be trapped ___________________?

1. 1 inch

2. 2 inches

3. 3 inches

4. 4 inches

The correct answer is: 2 inches

The correct answer indicates that a commercial food waste grinder should be trapped with a 2-inch trap. This specification is based on plumbing codes and standards that regulate waste disposal systems in commercial environments. A 2-inch trap is appropriate for food waste grinders, as it allows for adequate drainage and prevents clogs that could arise from the types of solids typically processed by these devices. The size also helps maintain proper flow rates, which is crucial in commercial settings where a higher volume of waste is generated compared to residential installations. Installing a trap that is too small can lead to blockages and inadequate drainage, while a trap that is excessively large may not facilitate the necessary water flow to carry waste away effectively. Thus, the 2-inch size is a balance that ensures efficient operation of the grinder and compliance with code requirements.