Question on proper venting of a shower drain

Reply

  #1  
Old 06-14-17, 02:56 AM
Member
Thread Starter
Join Date: Feb 2011
Location: United States
Posts: 200
Upvotes: 0
Received 0 Votes on 0 Posts
Question on proper venting of a shower drain

I am converting a tub/shower combo to a shower only, so the drain and overflow tubes will be replaced with the drain only. I want to do this correctly. This home is 30 years old. I have already dealt with several venting issues. I want to make sure the vent is correct for the new shower.

The photo below shows what I currently have. Is this the correct way to vent a shower drain?

Name:  20170613_093222.jpg
Views: 1899
Size:  36.6 KB
 
Sponsored Links
  #2  
Old 06-14-17, 07:46 PM
steve_gro's Avatar
Member
Join Date: Jan 2004
Location: San Francisco
Posts: 1,091
Upvotes: 0
Received 0 Votes on 0 Posts
One way would be to replace the 90 with a sanitary tee, then run the vent to >42" above the floor and tie into the vent-thru-roof. Or just run it thru the roof by itself if that's easier. If there's an attic, that might be a place to tie in.

 
  #3  
Old 06-15-17, 01:44 PM
Forum Topic Moderator
Join Date: Sep 2005
Location: USA
Posts: 4,570
Received 9 Votes on 8 Posts
Steve has the answer. The only other way I can see is to rework the 3" main drain to raise it up, so the shower would wye into it horizontally. Your issue is that you can't have the vertical drop after the p-trap without a vent.

Also, it's a bit hard to tell from the pic, but the shower drain needs to be 2". Tubs are often 1.5".
 
  #4  
Old 06-16-17, 06:23 PM
steve_gro's Avatar
Member
Join Date: Jan 2004
Location: San Francisco
Posts: 1,091
Upvotes: 0
Received 0 Votes on 0 Posts
I should also mention that the vent can be 1".
 
  #5  
Old 06-17-17, 05:30 AM
Member
Thread Starter
Join Date: Feb 2011
Location: United States
Posts: 200
Upvotes: 0
Received 0 Votes on 0 Posts
I appreciate the input guys. I am constantly surprised at how this how was incorrectly plumbed or how codes may have changed over the last 30 years.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes