GB 50242-2002 第4.2.5条
| **** | The horizontal clear distance between the water supply service pipe and the drainage discharge pipe shall not be less than 1 m. When indoor water supply and drainage pipes are laid in parallel, the minimum horizontal clear distance between the two pipes shall not be less than 0.5 m; when they cross, the vertical clear distance shall not be less than 0.15 m. The water supply pipe shall be laid above the drainage pipe; if the water supply pipe must be laid below the drainage pipe, a sleeve shall be added to the water supply pipe, and its length shall not be less than 3 times the diameter of the drainage pipe. |