GB 50974-2014 第4.4.4条
| **** | **Freeze protection and contamination prevention for fire water tanks (cisterns)**. Hotel rooftop fire water tanks or underground cisterns shall be protected from contamination by domestic sewage, rainwater, etc., and freeze protection measures shall be provided. Tank manholes, vent pipes, overflow pipes, etc. shall be fitted with protective screens to prevent the entry of insects and rodents. |