Plumber Red Seal · Question
What is the primary function of an air gap in a potable water distribution system?
An air gap is the most reliable method of backflow prevention, as it provides a physical, vertical separation between the lowest point of a potable water outlet
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Question: What is the primary function of an air gap in a potable water distribution system?
Answer options: ✅ To physically separate a potable water outlet from a non-potable source.
- To introduce air into the water to prevent stagnation.
- To provide a vent for pressure relief in the system.
- To muffle noise caused by water flow.
Correct answer: To physically separate a potable water outlet from a non-potable source.
Explanation: An air gap is the most reliable method of backflow prevention, as it provides a physical, vertical separation between the lowest point of a potable water outlet and the flood-level rim of the receiving non-potable fixture or container. This physical separation prevents any possibility of back-siphonage or back-pressure contamination.
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