Vinmassaro
Member
I am currently renovating my master bath and am unsure if I need to add any additional venting for the shower, and where if required. Below is a diagram of how the plumbing is set up. Thank you.
Probably not.Can I come off the side of the long piece and run it under the trap and up through the wall?
No, I apparently didn't explain it well. I drew it up below, where I extended one of your pictures to show the lavatory connections (and apparently drew it a bit askew). Brown is stud, green is 1.5", blue is your lavatory stack. You just have to go through studs and the bottom plate, no new holes in joists (unless I'm misinterpreting your photos).It looks like wet venting option you mentioned would require me to drill more holes through the joists and then remove a portion of the bathroom subfloor and tie it into the 1.5in copper drain.
I didn't review the whole thread, so just in regards to the last drawing, if the following are all true, then the lavs wet vent both the shower and the WC:
- The copper stub of lav drain at the bottom plate hits a LT90 and then the lav drain follows the green path, hitting the shower drain with a horizontal combo
- The PVC wye where the lavs join has a 2" outlet, and the green lav drain is 2".
- The shower trap arm from trap to where the green meets the blue is pitched at least 1/4" per foot, but the total fall is no more than the pipe diameter (2" ?)
If the second point isn't true (you have 1-1/2"), you could open up the subfloor and change the pipe size to 2".
Cheers, Wayne