Do I need an air gap for my new dishwasher installation?

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Asked By User4321! On

I recently moved into a home and am planning to replace the old dishwasher with a new one. The current setup doesn't include an air gap, and I'm wondering if I need to install one for the new dishwasher. I want to avoid any drilling into my granite countertop if it's not necessary. Can anyone help clarify whether an air gap is required or if I can skip it?

3 Answers

Answered By HomeCookHero On

Most codes do require an air gap to prevent contamination. If you go for a high loop instead, make sure it's set above the sink's flood level. Remember to run your sink or garbage disposal before the dishwasher starts to maintain good flow. And just a heads up, if you ever plan to sell, an air gap might be brought up during the inspection.

User4321! -

That's good to know! I’ll check the local code, but the inspector didn’t mention the air gap when I purchased my home last year. Does that mean it might not be a requirement here? Also, without a garbage disposal in my sink, would that complicate things without an air gap?

Answered By RenovationNinja22 On

Good point about local codes! I’ve seen that many people, including myself, bypass the air gap by using a high loop on the drain hose, especially if it's not enforced where they live. Just keep that in mind as an alternative if you decide against the air gap.

Answered By FixerUpper123 On

You'll definitely want to check your local plumbing code since it often dictates whether an air gap is a must-have. From a functionality standpoint, your dishwasher can work without one, but it's safer to have it to prevent any backflow issues.

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