
Performance Requirements for Double Check Detector Backflow Prevention Assemblies
出版:American Society of Sanitary Engineers

專(zhuān)家解讀視頻
The purpose of a Double Check Detector Backflow Prevention Assemblies is to keep polluted water from flowing into a potable water distribution system when some abnormality in the system causes the pressure to be temporarily higher in the polluted part of the system than in the potable water supply piping.