How do they work? Oil Traps 1. Dishwashing and kitchen water enters the trap. 2. The water speed decreases inside the tank. 3. Oils and greases float to the top. 4. Food scraps and heavy materials settle at the bottom. 5. Water passes from the middle to the drainage network. For Restaurants There are two common types: * Small indoor trap: For kitchens with limited drainage. * Large outdoor trap (Grease Interceptor): For large restaurants and high drainage volumes. If you tell me the approximate number of meals or the size of the restaurant, I can determine the appropriate oil trap size in liters and draw you a diagram for its installation.