Highland Tank has introduced its Grease Removal Systems product line for food preparation and processing facilities. The Automatic Grease Interceptors remove and recover nearly 100% of the fats, oils and grease from kitchen and food processing drains. They are available in 14 sizes and flow rates of 20 to 800 gpm. Highland's Passive Grease Interceptors are designed to intercept and remove large quantities of fats, oils and grease discharged from food service facilities and large commercial/institutional kitchens that might interfere with the proper drainage and treatment of municipal wastewater. These units accept gravity flow and feature the Switchback Baffling System that retains wastewater long enough to allow liquefied grease to cool down, separate and congeal. Highland Tank.