GB/T 50378-2019 第6.2.6条
| | Plumbing system: Water-saving sanitary fixtures shall be used in guest rooms and public restrooms (e.g., toilet water consumption ≤4.0 L/flush, faucet flow rate ≤6.0 L/min), and a hot water circulation system shall be provided to ensure the outflow time ≤10 s when the outlet water temperature is ≤45℃. |