A grease trap is an interceptor whose rated flow is 50gpm or less and is a device located inside a facility and/or under a sink designed to collect, contain, or remove food wastes and grease from the wastewater while allowing the balance of the liquid waste to discharge to the wastewater collection system by gravity.
Grease traps are typically found in commercial locations that cook large amounts of food, such as restaurants, hospitals, schools and institutions.