List of States allowing dishwasher air gap

I’m trying to put together a comprehensive list of the States that require an air gap on the dishwasher, and those that will accept a high loop. I have already entered information for California and Utah, because I know those two. Please go to the link and add your information. Thanks for participating.Is a dishwasher air gap required in your State - Google Docs

Frank, what is the purpose/intended use for this list?

I just think it’s useful information for comparison. I haven’t decided yet how to use it. But when I was looking for this information, it wasn’t available in one place.

When did it become code? Is it a defect or a code violation?
Wisconsin is above or below the countertop. Below is a standpipe.

Ok, but in my opinion, it is not entirely useful unless it contains all the facts. In example, MN did not require Air Gaps until Jan 2016, which means that 99% of all homes I inspect will not be required to have an air gap. Prior to 2016, all DW’s required high loops. Now, which detail is more important to an inspector?

Note: All this info was sent to Frank by myself for his listing, so this is not an attack on someone elses post. Frank chose not to use the provided information.

Does a Dishwasher require a Air Gap?

Check out old forum

I’m just concerned with current requirements.

I have never seen one around here.

From the GE dishwasher installation manual.

• Follow local codes and ordinances.
• Do not exceed 10’ distance to drain.
• Do not connect drain lines from other devices to the
dishwasher drain hose.
NOTE: Air gap must be used if waste tee or disposer connection
is less than 18" above floor to prevent siphoning.
The type of drain installation depends on the following
■ Do local codes or ordinances require an air gap?
■ Is waste tee less than 18" above floor?
If the answer to either question is YES, Method 1 MUST
be used.
• If the answers are NO, either method may be used.

Method 1 – Air Gap with Waste Tee or Disposer
An air gap must be used when required by local codes and ordinances.
The air gap must be installed according to manufacturer’s instructions

Method 2 – Drain Hose Routing
When not using an air gap, the drain hose must be routed to form a high
loop of at least 32" to prevent siphoning.

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I’m just looking for a simple air gap required, or high loop is okay. Don’t overthink it. Keep it simple. Have you looked at the document?

You mean the one I posted…Yes!


For example :

California :Air gap required
Utah : High loop okay

I notice that there is nothing filled in for Florida yet.

Here is the Florida code.
It appears you can do what you want.
What do you think?

802.1.6 Domestic dishwashing machines.
Domestic dishwashing machines shall discharge indirectly through an
air gap or air break into a standpipe or waste receptor in
accordance with Section 802.2, or discharge into a
wye-branch fitting on the tailpiece of the kitchen sink or the
dishwasher connection of a food waste grinder. The waste
line of a domestic dishwashing machine discharging into a
kitchen sink tailpiece or food waste grinder shall connect to
a deck-mounted air gap or the waste line shall rise and be
securely fastened to the underside of the sink rim or counter.

Now you know why you can’t find a similar list on Google. Not a simple list like you want.

Which means that the high loop is okay for Florida. That’s all I wanted to know. K.I.S.S.

Six States done, and 44 to go.

Kansas & Missouri have NO state wide licensing for plumbers OR builders, etc NOR a state wide adopted code SO every city, county or municipality can be different.

Wonder how many other states are like that.

I believe he is instituting his patent pending AirGapCheck Warranty program, might actually be the best warranty program out there right now.

(az is high loop)

Shhhh… keep it on the downlow. :slight_smile:

Will it be a Dishwasher BUY BACK?