For a grease interceptor to service as a trap for a fixture, it must have?

The correct choice is based on the required specifications for a grease interceptor, which is designed to effectively separate grease and food particles from wastewater before it enters the main sewer system. A 1-1/2 inch trap seal is essential because it provides an adequate water barrier that prevents the escape of sewer gases while also allowing for the effective trapping of grease and oils.

In plumbing systems, a proper trap seal is crucial to maintaining health and safety standards, as it helps prevent odor and contamination from sewer gases. The specific dimension of 1-1/2 inches is typically required in plumbing codes to ensure a balance between efficiency in trapping grease and the functionality of the plumbing system. It is large enough to accommodate the volume of grease that may enter the interceptor while still being practical for standard plumbing installations.

Understanding the measure of a trap seal helps in selecting the correct grease interceptor for various applications and in ensuring compliance with local plumbing regulations.