Under counter air gap for dishwasher

[JDkimes]

Is there such a thing as an undercounter air gap?
Is an air gap needed or required if drains to disposal?

 

[Reach4]

Is there such a thing as an undercounter air gap?
Is an air gap needed or required if drains to disposal?

It depends on the jurisdiction.

See http://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=1205 section 807.4

I did not check to see if that was actually in effect.

 

[Sponsor]

 

[JDkimes]

Reach4 thanks!
So reading that code...what is considered the flood level of the sink?

 

[Reach4]

Reach4 thanks!
So reading that code...what is considered the flood level of the sink?

Block the drain, and run the water. At the flood level, the water will stop rising, and will spill onto the floor.

 

[JDkimes]

Ok so given that I'll have run into separate trap to have the air gap under counter

 

[Terry]

The air gap is above the counter.
If you don't have an air gap, at least loop the drain from the dishwasher as high as you can under the countertop before installing to a disposer or a trap.

An airgap below the counter isn't a good idea. They can overflow.

 

[hj]

WHEREVER you install the air gap, if it is below the counter top will become the "spill level" because it is where any backup will overflow into the cabinet.

 

[JDkimes]

The air gap is above the counter.
If you don't have an air gap, at least loop the drain from the dishwasher as high as you can under the countertop before installing to a disposer or a trap.

An airgap below the counter isn't a good idea. They can overflow.

Ok I'll put in the air gap on the counter it's in an island sink with granite and thought it would be nice to have fewer obstruction for the sink/counter etc.

 

[Reach4]

Ok I'll put in the air gap on the counter it's in an island sink with granite and thought it would be nice to have fewer obstruction for the sink/counter etc.

You can get a combination air gap with soap/lotion dispenser.

 

[JDkimes]

Checked with City of Littleton code/inspectors and they said it's fine to do the undercounter air gap as shown in the State code here:
http://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=1205 section 807.4

 

[Reach4]

Checked with City of Littleton code/inspectors and they said it's fine to do the undercounter air gap as shown in the State code here:
http://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=1205 section 807.4

They show a standpipe for the dishwasher. Is that your intention?

 

[JDkimes]

Yes.
That's it.
My new single drain sink in an island, with AAV and is a single drain into the disposal.
So lots of fun under there...

 

[Reach4]

They are explicitly permitting a kitchen wet vent. Cool.