Question on proper venting of a shower drain
#1
06-14-17, 02:56 AM
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?
The photo below shows what I currently have. Is this the correct way to vent a shower drain?
#2
06-14-17, 07:46 PM
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
06-15-17, 01:44 PM
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".
Also, it's a bit hard to tell from the pic, but the shower drain needs to be 2". Tubs are often 1.5".
#5
06-17-17, 05:30 AM
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.
