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Where is a double check backflow prevention assembly used?

April 26, 2017assembly backflow double prevention Used

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Where is a double check backflow prevention assembly used?

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A double check backflow prevention assembly may be used as protection of all direct connections through which foreign materials might enter the potable water system in concentration which would constitute a nuisance or aesthetically objectionable, such as air, steam, food, or other material which does not constitute a health hazard.