There are dozens of grease interceptor and grease trap sizing formulas –most of which are not very good. Recommend adopting minimum grease interceptor sizes for types of food service establishments (FSEs)
Example: Fast Food Facilities‐1,000 gallons; Full Service Restaurants‐1,500 gallons; Prisons, hospitals‐2,000 gallons. Select a sizing formula that uses fixture units and the size of pipe Details on the design, installation and maintenance of the interceptor should be in the FOG Mgt. Policy or FOG Ordinance.