Series 957RPDA, 957NRPDA, 957ZRPDA Reduced Pressure Detector Assemblies provide protection to the potable water system from contamination in accordance with national plumbing codes.

• 系列957RPDA,957NRPDA,957ZRPDA减压检测器总成按照美国国家管道规程对防止饮用水系统受到污染提供保护。