Canadian Food Handler Certificate · Question
What is the purpose of an air gap in a sink drain system?
An air gap is a physical separation between the water outlet and the flood-level rim of a fixture. It is a critical measure to prevent dirty water from siphonin
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Question: What is the purpose of an air gap in a sink drain system?
Answer options:
- To improve water pressure. ✅ To prevent backflow of contaminated water into the potable water supply.
- To reduce noise from the drain.
- To cool down hot water before it enters the sewer.
Correct answer: To prevent backflow of contaminated water into the potable water supply.
Explanation: An air gap is a physical separation between the water outlet and the flood-level rim of a fixture. It is a critical measure to prevent dirty water from siphoning back into the clean water system (backflow).
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