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How a backflow prevention valve works
0:36
YouTubeStAugustineRecord
How a backflow prevention valve works
CONTRIBUTED A video from WAPRO Inc shows how a backflow prevention valve works. The city of St. Augustine is planning to install these types of valves in Davis Shores, including valves from Tideflex. http://bit.ly/2ybt7JK http://bit.ly/2wO9Ydc
已浏览 7.6万 次2017年10月11日
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Backflow Preventers 101: Double Check vs RPZ
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已浏览 7.2万 次2018年3月28日
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YouTubeAmerican Backflow Products
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YouTubeSafe-T-Cover
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