FOG for Business

Frequently Asked Questions about Grease Traps & Interceptors


What is the difference between oil and grease?
Grease is solid/semi solid usually from meat such as bacon. Oil is usually vegetable based such as corn, olive, peanut and is usually liquid.


What is a grease trap/grease interceptor?

A grease interceptor is a plumbing device designed to physically separate grease and solids from kitchen wastewater.


What is the difference between a grease trap and a grease interceptor?

The two terms are often used interchangeably but grease trap usually refers to an inside under sink or in floor unit made from steel or plastic. Grease interceptor usually means an outside tank in the ground usually made of concrete. Grease interceptor is the technically correct term for both types.


What size grease Interceptor will I need?

We recommend contacting a licensed commercial plumber for assistance. The size of the unit will be determined according to Florida Building Code section 10.


 How often must my grease interceptor be cleaned?

Interior type interceptors must be completely emptied and cleaned every 7 days or 30 days depending on size and type. In ground interceptors must be cleaned as often as necessary but not less than every 90 days. All types of interceptors must be cleaned whenever they contain 20% or more Fats, Oils, Grease and solids by volume.


Why do I need one for my restaurant or clubhouse, we only make coffee and sandwiches?

Many people use milk or cream in their coffee, dairy contains fats. Coffee contains lipids which are fats. Sandwiches have condiments such as mayo and mustard and toppings such bacon and lettuce. Grease interceptors are designed to “trap” all types of oils and food sediments.


How can I get more information?