Bathroom remodel

Old 02-12-18, 03:01 PM
Thread Starter
Join Date: Sep 2016
Location: United States
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
Bathroom remodel

I recently started to remodel a small half bath in my home. I changed the layout and will move the toilet and vanity to an adjacent wall. My question is can I have the vanity drain wye into the toilet drain pipe. The vent for both would be the main stack. Any comments or critique would be appreciated.
Attached Images  
Old 02-18-18, 01:48 PM
Forum Topic Moderator
Join Date: Sep 2005
Location: USA
Posts: 6,182
Received 436 Upvotes on 388 Posts
No issue with setting the vanity drain into a Wye into the toilet drain.

The issue comes with venting. The vanity needs its own vent going up. It can't drop down below the floor and then vent as that creates an 'S' trap, which is no longer to code (as of the 70's or so).

The toilet can use the main stack IF there aren't any fixtures above. If it's a 2-story house, the main stack can't be used as a fixture/bathroom vent.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: