GB 50015-2019 第3.5.4条
| **** | Drainage pipes (for hotel bathrooms, kitchens, etc.) shall be rigid polyvinyl chloride (PVC-U) drainage pipes, high-density polyethylene (HDPE) drainage pipes, or flexible-joint machine-made cast iron drainage pipes. The diameter of the drainage riser for hotel guest room bathrooms shall not be less than DN100. |