When potable water is discharged into any reservoir, air gaps are essential to prevent what?

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Multiple Choice

When potable water is discharged into any reservoir, air gaps are essential to prevent what?

Explanation:
Air gaps are used to prevent backsiphonage. If downstream pressure falls, water from the reservoir could be drawn back into the potable supply, potentially pulling contaminants with it. The air gap creates a physical break between the discharge and the receiving surface, so there’s no continuous water path for a siphon to form. Oxygenation, maintaining pressure, or collecting condensates are not achieved by an air gap.

Air gaps are used to prevent backsiphonage. If downstream pressure falls, water from the reservoir could be drawn back into the potable supply, potentially pulling contaminants with it. The air gap creates a physical break between the discharge and the receiving surface, so there’s no continuous water path for a siphon to form. Oxygenation, maintaining pressure, or collecting condensates are not achieved by an air gap.

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