Rhode Island Journeyman Plumber Practice Exam

To what drain size must a commercial food waste grinder be connected?

1. 1 inch deep with a 2-inch drain

2. 1.5 inches deep with a 3/4-inch drain

3. 1.5 inches deep with a 2-inch drain

4. 2 inches deep with a 1/2-inch drain

The correct answer is: 1.5 inches deep with a 3/4-inch drain

The connection of a commercial food waste grinder is essential for ensuring proper flow and functionality. The standard practice dictates that these grinders need to be connected to a drain size that can adequately handle the waste and prevent potential clogs. In this case, a drain depth of 1.5 inches with a 2-inch drain is optimal. This configuration ensures sufficient capacity for the volume of waste produced in a commercial setting. A 2-inch drain is typically large enough to manage the semi-liquid waste material from the grinder, promoting efficient drainage and minimizing the risk of backups or blockages. Additionally, other options either indicate insufficient drain sizes or improper depth, which would not meet the requirements for effective waste management in a commercial environment. This is particularly important in settings like restaurants or cafeterias, where the food waste volume can be significant. Using a properly sized drain not only ensures compliance with plumbing codes but also optimizes the performance of the food waste grinder.