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Air space used to separate a water supply outlet from any potentially contaminated source is called a(n)
O back-siphoning device
O backflow
O alr gap
O closed water container

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Answer:

air gap

Explanation:

It is also called air doors or fly fans. Air space used to separate a water-supply outlet from any potentially contaminated source. The air space between the floor drain and the drainpipe of a sink is an example. An air gap is the only completely reliable method for preventing backflow.

Answer:

air gap

Explanation:

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