What are the measures to prevent sewage pipe siltation

The main measures to prevent backflow pollution: I. The pipeline design should meet the following requirements: (1) The water supply pipe distribution outlet should not be flooded by any liquid or impurity. (2) water supply pipe distribution outlet above the overflow level of water equipment, the minimum air gap, not less than 2.5 times the diameter of the water supply pipe at the distribution outlet. (3) When it is impossible to set the minimum air gap for special appliances and production water equipment, anti-fouling isolator should be set or other effective isolation measures should be taken. Second, domestic drinking water piping can not be directly connected to the toilet (tank). Third, buried domestic drinking water storage tank and septic tank net distance, should not be less than 10 m. When the net distance can not be guaranteed, should take the domestic drinking water storage tank is not polluted measures. Fourth, living or domestic water and other water pools, tanks, pools (tanks) should be used in the form of an independent structure, do not use the underlying structure of the building as a pool pool walls and tank walls. V. The following equipment and containers shall not be directly connected to the sewage and waste water piping system, and indirect drainage shall be adopted: (1) the drain pipe and overflow pipe of the domestic drinking water storage tank (pool). (2) Drainage from food preparation and washing equipment in kitchens. (3) Drainage from medical sterilization and disinfection equipment. (4) Drainage from air-conditioning equipment such as evaporative coolers and air cooling towers. (5) Storage of food or beverage refrigeration room, cold storage warehouse floor drainage and chiller frost water tray drainage.