Venting a double-sink vanity

Users who are viewing this thread


New Member
Reaction score
Ontario, Canada
Hi all,

I am converting a single sink vanity into a double-sink vanity and am stuck on the venting and drainage. I cannot use the current drain as the new vanity has a vertical support bar that would be where the current drain is. As such, I'd like to make two drains, piped to be underneath each sink.

I've been looking through a few different threads on the subject, and have attached a drawing with the current setup and what I believe are my two options. I am leaning towards option 2, but don't know if perhaps option 1 would be preferred?

- Circles indicate where the piping would come out of the wall, and each would have a P-Trap under each sink
- Every tee would be a sanitary tee

venting options.png

Thank you in advance,

Last edited:
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks