How Grease Interceptors Work

A grease interceptor is a passive control device that is designed to help reduce fats, oils, greases, and solids from entering the sanitary sewer collection and treatment system.

Grease interceptors hold the fats, oils, greases, and solids until they can be removed and disposed of by recycling, rendering, or land application.

For more information, view the grease interceptor process diagram.

Grease Interceptor Facts
Grease interceptors allow wastewater flows to slow down. With sufficient time fats, oils, greases, and solids separate from wastewater.

The fats, oils, and greases are less dense than water and float. The solids are denser than water and sink.

Grease interceptors are designed in a variety of sizes, shapes, and constructed of various materials.