Maintenance Guides / Plumbing & Water

Test dishwasher air gap valve

Difficulty: easyTime: 10 mins

Why it matters

Code-required air gaps prevent backflow contamination.

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How to do it

  • 1

    Locate air gap cap on counter behind faucet.

  • 2

    Remove cap and screen.

  • 3

    Rinse screen under hot water.

  • 4

    Use pipe cleaner to clean inside.

  • 5

    Flush gap with vinegar.

  • 6

    Reinstall screen and cap.