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Backflow
1:56
YouTubeCharleston Water System
Backflow
Backflow is the reversal of water flow, and it can present a risk to water quality in public water systems. That's why water utilities require some customers to install a backflow preventer. This video explains how backflow occurs and how prevention assemblies work.
75.5K viewsJan 13, 2012
Backflow Preventer Installation
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