What is the minimum capacity of a grease interceptor according to the code?

The minimum capacity of a grease interceptor, as specified in plumbing codes such as the Omaha Plumbing Code, is typically set to 750 gallons. This capacity is established to ensure effective separation of fats, oils, and grease from wastewater, which is crucial for preventing clogs and maintaining the functionality of the plumbing systems. Grease interceptors are designed to hold a sufficient volume to accommodate peak flows from commercial kitchens and food service establishments without becoming overloaded, which would compromise their efficiency in capturing waste grease.

Choosing 750 gallons reflects a balance between capturing adequate grease content while allowing for manageable maintenance and servicing intervals. A larger interceptor may not be practical for all installations, and too small a unit would lead to frequent overflows and underperformance. Understanding this capacity requirement is essential for compliance with local regulations and for ensuring the integrity of sewer systems.