The ex-contractor built the upstairs bathroom space too far over, so it doesn't line up with the downstairs bathroom and the stack vent from downstairs comes up in the middle of the room(!). I'm re-routing the drain and vent to accommodate the upstairs fixtures, but I need to know if this will work.
I plan to drain the upstairs toilet into a 4" line with a 4" vent stack. The upstairs shower and vanity will drain into a 2" line with a 2" branch vent. Please let me know if this will work (see attached illustration).
In the picture, I had to "spin" the downstairs bathroom 90 degrees toward the front, so the downstairs commode and vanity are actually along the same wall where the stack rises up into the second floor.

Hi Dave...

Picture didn't post. Let us know if you need help posting the pic. OK?

Mark

The upstairs bathroom space was built too far over to one side (not by us), so its walls don't line up with those in the downstairs bathroom and the main vent stack from downstairs comes up through the middle of the second-floor bathroom(!). For several reasons, I want to re-route the main vent and use it to drain the upstairs fixtures. The downstairs bathroom would continue to drain into the main DWV line and would still vent through the roof, but let me know if you think this will work... open the downstairs bathroom wall and re-route the main 4-inch vent stack about five feet through a drop-ceiling, then go vertical through a second-floor wall and out through the roof. The upstairs water closet would wye into the re-routed drain line, empty into the main DWV stack, and vent through the relocated stack.The upstairs shower and vanity would connect to 2-inch drains, empty into the original main DWV stack, and branch vent through a 2-inch pipe over the top of the second-floor bathroom to the relocated stack (see illustration).
Note: In the picture, I had to spin the downstairs bathroom 90 degrees toward the front--so the downstairs water closet and vanity are actually along the same wall where the original vent stack rises up into the second floor.
1) is this up to code..
2) Will this work the way I need it to..
Here's a link to the picture...
https://www.askmehelpdesk.com/attachment.php?attachmentid=34075&stc=1&d=1290614892

Thanks... I re-submitted: "Re-routing upstairs DWV stack" with a link to the picture...
https://www.askmehelpdesk.com/attachment.php?attachmentid=34075&stc=1&d=1290614892
Dave (ThatDaveGuy)

Dave,
Your attachments failed to upload,
Here's then instructions.


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How do I add pictures and other file types to my post?
A. "Attach" files (including pictures) from your computer. This method puts the attached file below the text of the post.
Click on an Ask or Answer button to ask or answer a question
Compose your question or answer in the window.
Under the window where you composed your question or answer is a section called Additional Options.
Click on the Manage Attachments button: a pop-up dialog will open. NOTE: The Manage Attachments dialog lists the maximum sizes of the various types of files that may be attached.
Click the Browse button to navigate to the image on your computer and double click the file on your computer: this will return you to the dialog window.
Click the Upload button.
Click the link to close the dialog window OR repeat numbers 5 & 6 to attach another image.
B. "Embed" image(s) from the internet. This method inserts an image wherever you wish within the text of your post.
Click the Insert Image icon above the posting window: A pop-up asking for the URL will open.
Enter the URL of the image in the field then click the OK button.
Good luck, Tom

Thanks...
Here's a link to the picture:
https://www.askmehelpdesk.com/attachm... 1&d=1290614892
I did all the steps above to load the picture from the site, but without success.
Dave

Still didn't come through Dave, Give it another try. Regards, Tom

This time for sure... I hope the picture makes it clear; the original stack comes up in the middle of the room, so it needs to move about five feet to the East.

Trying to attach the picture again...
The upstairs bathroom space was built too far over to one side (not by us), so its walls don't line up with those in the downstairs bathroom and the main vent stack from downstairs comes up through the middle of the second-floor bathroom(!). For several reasons, I want to re-route the main vent and use it to drain the upstairs fixtures. The downstairs bathroom would continue to drain into the main DWV line and would still vent through the roof, but let me know if you think this will work... open the downstairs bathroom wall and re-route the main 4-inch vent stack about five feet through a drop-ceiling, then go vertical through a second-floor wall and out through the roof. The upstairs water closet would wye into the re-routed drain line, empty into the main DWV stack, and vent through the relocated stack.The upstairs shower and vanity would connect to 2-inch drains, empty into the original main DWV stack, and branch vent through a 2-inch pipe over the top of the second-floor bathroom to the relocated stack (see illustration).
Note: In the picture, I had to spin the downstairs bathroom 90 degrees toward the front--so the downstairs water closet and vanity are actually along the same wall where the original vent stack rises up into the second floor.
1) is this up to code..
2) Will this work the way I need it to..
Here's a link to the picture...
https://www.askmehelpdesk.com/attachm...1&d=1290614892

I clicked on the "Want to add an attchment?" link. Hope it works.
Thanks, guys!

This time for sure... I hope the picture makes it clear; the original stack comes up in the middle of the room, so it needs to move about five feet to the East.
Tell me more! Is this stack a soil stack? Does it have fixtures draining into it or is it a vent stack?

the original stack comes up in the middle of the room And what's under that room? Basement? A ceiling? Crawl space? What?
If you can't post a picture load me up with details. Regards, Tom

https://www.askmehelpdesk.com/attachment.php?attachmentid=34075&stc=1&d=1290614892

The above link goes to the picture that I made.

This is what I get when I click on your link,

You have attempted to view a Attachment that no longer is available. Please click one of the links in the menu to continue.

Try pasting this into the address bar...
https://www.askmehelpdesk.com/attachment.php?attachmentid=34075&stc=1&d=1290614892
Sorry

No joy! I'll try to work with what we have. Back in a few hours. Tom