For kitchen sink installations, which air gap designation is specified?

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Multiple Choice

For kitchen sink installations, which air gap designation is specified?

Explanation:
Air gaps protect the potable-water supply by creating an air break between the sink/dishwasher discharge and the drain, preventing backflow and siphonage. For kitchen sink installations, the standard specifies the AUK3 designation, which identifies the approved air gap device/class to use and ensures it meets the required performance and connection criteria. That’s why AUK3 is the correct designation. AUK2 would be a different class not designated for this kitchen-sink setup, None would imply no required air gap (which would fail backflow protection), and a bypass would defeat the purpose of the air gap by bypassing the protective device.

Air gaps protect the potable-water supply by creating an air break between the sink/dishwasher discharge and the drain, preventing backflow and siphonage. For kitchen sink installations, the standard specifies the AUK3 designation, which identifies the approved air gap device/class to use and ensures it meets the required performance and connection criteria. That’s why AUK3 is the correct designation. AUK2 would be a different class not designated for this kitchen-sink setup, None would imply no required air gap (which would fail backflow protection), and a bypass would defeat the purpose of the air gap by bypassing the protective device.

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