Home / Standards / GB/T 44574-2024 GB/T 44574-2024 Active Plastic check valves for anti-pollution for discharge piping systems inside buildings 建筑排水管道系统防污染用塑料止回阀 Standard Type GBT ICS 83.140.30 CCS G33 Status 现行 Issue Date 2024-09-29 Implementation 2025-04-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A