Hi everyone! I'm planning to replace my really old dual bowl kitchen sink (it's been around for about 30 years) with a new single bowl. Since I'll be working under the sink, I was wondering if I should also add a dishwasher air gap while I'm at it? I eventually want to replace my dishwasher too. I know my state, Georgia, now requires it, even if my house didn't when it was built. I've read that the air gap needs to be mounted through the countertop, but can it be placed underneath? Also, I've noticed a vent on one of the taller pipes connecting to both the main sink drain and the dishwasher hose—could that be the air gap? I heard having the hose elevated can work but might not be code compliant. Here are some photos of my current plumbing setup: [photos](https://imgur.com/a/f7yMh72). Thanks for any advice!
1 Answer
You might be in luck! Some sinks come with a pre-drilled hole for an air gap or a soap dispenser, so if you choose the right sink and faucet combo, you won’t need to mount the air gap through the countertop—assuming it’s not an undermount sink. In my area, there's a workaround called a 'high loop' where the dishwasher hose loops up to the bottom of the counter. You could also consider a standpipe, but honestly, the easiest route is to get a new sink that has a designated hole for the air gap. Just make sure it meets your local codes!
That’s great to know about the high loop! I think I have that setup currently since my hose goes up to the base of the countertop. I’m looking at this sink that has a capped hole for a soap dispenser, which seems perfect: [KRAUS Fairlane Sink](https://www.homedepot.com/p/KRAUS-Fairlane-33-Drop-In-Top-Mount-Single-Bowl-18-Gauge-Stainless-Steel-Kitchen-Sink-KHT640-33/331765713).