AWWA C506-1978 标准详情
- 标准号:AWWA C506-1978
- 中文标题:
- 英文标题:Backflow Prevention Devices - Reduced Pressure Principle And Double Check Valve Types
- 标准类别:美国水工协会AWWA
- 发布日期:
Describes two types of backflow prevention devices made to withstand a water working pressure of 150 psi without damage to working parts, operates on hot or cold water lines. Types are reduced pressure principle and double check valve types
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