# Drain Vent? **URL:** \ **Category:** Public Archive\ **Created:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916 "2004-12-10T00:00:00Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/1 "2004-12-10T00:00:00Z")
**Originally Posted By: jpope** **This post was automatically imported from our archived forum.** * * * I guess they’ve never heard of an AAV ![icon_biggrin.gif](https://global.discourse-cdn.com/internachi/original/3X/8/3/83717c74df9b0ce202453063bc4f11baf0ee6b8a.gif) * * * -- Jeff Pope JPI Home Inspection Service "At JPI, we'll help you look better" (661) 212-0738 ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/2 "2004-12-10T00:00:00Z")
**Originally Posted By: lkage** **This post was automatically imported from our archived forum.** * * * Pardon me…I’m drawing a blank. What’s an AAV? * * * ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/3 "2004-12-10T00:00:00Z")
**Originally Posted By: jpeck** **This post was automatically imported from our archived forum.** * * * AAV Air Admittance Valve. * * * -- Jerry Peck South Florida ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/4 "2004-12-10T00:00:00Z")
**Originally Posted By: kmcmahon** **This post was automatically imported from our archived forum.** * * * It looks like that used to go to be the drain for another sink? Is that a possibility? Even the supply lines come from over there. That’s what I’d guess it was, just an improperly capped off sink drain. * * * – [Wisconsin Home Inspection, ABC Home Inspection LLC](http://certified-inspector.com) [Search the directory for a Wisconsin Home Inspector](http://wisconsin-home-inspectors.com) ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/5 "2004-12-10T00:00:00Z")
**Originally Posted By: lkage** **This post was automatically imported from our archived forum.** * * * Air Admittance Valve. Okay, Thanks. We call them the technical term...flapper ![icon\_biggrin.gif](upload://iKNGSw3qcRIEmXySa8gItY6Gczg.gif) * * * ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/6 "2004-12-10T00:00:00Z")
**Originally Posted By: jschwartz1** **This post was automatically imported from our archived forum.** * * * holy sewer gas batman!!! * * * ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/7 "2004-12-10T00:00:00Z")
**Originally Posted By: jbehling** **This post was automatically imported from our archived forum.** * * * | **jschwartz1 wrote:** | | holy sewer gas batman!!!!!!! | Nah, it's above the trap. I'm with Kevin on this one. ![icon\_wink.gif](upload://ssT9V5t45yjlgXqiFRXL04eXtqw.gif) * * * ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/8 "2004-12-10T00:00:00Z")
**Originally Posted By: jpope** **This post was automatically imported from our archived forum.** * * * | **kmcmahon wrote:** | | It looks like that used to go to be the drain for another sink? Is that a possibility? Even the supply lines come from over there. That's what I'd guess it was, just an improperly capped off sink drain. | You're correct Kevin. * * * -- Jeff Pope JPI Home Inspection Service "At JPI, we'll help you look better" (661) 212-0738 ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [December 10, 2004, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/9 "2004-12-10T00:00:00Z")
**Originally Posted By: jpeck** **This post was automatically imported from our archived forum.** * * * It’s an “overflow”. When the trap backs up, keeps the crud from "overflowing" into the sink. ![icon\_lol.gif](upload://zEgbBCXRskkCTwEux7Bi20ZySza.gif) Kevin is correct, the AAV would be on the other side of the trap. * * * -- Jerry Peck South Florida ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [June 29, 2005, 12:00am UTC](https://forum.nachi.org/t/drain-vent/180916/10 "2005-06-29T00:00:00Z")
**Originally Posted By: mcyr** **This post was automatically imported from our archived forum.** * * * ![icon_smile.gif](https://global.discourse-cdn.com/internachi/original/3X/4/d/4dce0a1c1db0bf5321e5b3270bfbc1b059ae6ef2.gif) Hi. to you all. I believe this is another homeowner re-hab, where a mechanical vent was installed and is legal in most states for re-hab work, but I still recommend that a licensed plumber investigate the installation. Marcel * * *