Commercial kitchens are extremely busy environments with potentially wet and greasy floors due to the abundance of liquids used in both the cooking and cleaning processes.
Waste water can also contain fat which is a major cause of pipe blockages and cannot be released to the waste water system. The drainage system installed in commercial should not compromise its cleanability, durability and flow rate to not affect food safety, operational cost and health & safety. All those factors should be taken into depending on size of the kitchen, type of food being prepared. In the 5 star hotel kitchen or high capacity canteen will be different drainage requirements than in small restaurant or food court.