Grease Interceptors, commonly known as Grease Traps, retain the grease in the water before discharging it into the sewer system. This item is especially necessary in kitchens and restaurants where food is prepared from oil or fat. All grease trap bodies are made from corrosion-resistant, dura-coated steel with slip resistant cover, flow diffusing baffle, integral trap, and external vented inlet flow control. Nations WareHouse offers a variety of quality grease interceptors from Zurn.