Why should surface water be uniformly arranged?

Because the surface water should be uniformly discharged to the surface to prevent the danger of methane generated in the sewage pipe and vent the methane into the sky. The drainage riser should be close to the drainage point with the largest displacement;

Overhead pipelines shall not be laid in production workshops with special requirements for production technology or hygiene, as well as warehouses for instruments and precious commodities, ventilation rooms, power distribution rooms and elevator rooms;

Drainage pipes shall not pass through settlement joints, expansion joints, deformation joints, flues and air ducts; Buried drainage pipes should not be arranged on the basis that they may be crushed by heavy objects or pass through production facilities.

Drainage riser shall not pass through bedrooms, wards and other rooms with high requirements for hygiene and quietness, and shall not be close to the inner wall adjacent to the bedroom;

Drains should not go through windows and closets.