Thomas K
Member
I will have to cut the dual lav drain right behind the wye in image 1877 and add a 2" long ell fitting to take it straight down through the floor plate. There's just enough room. Seems to join three 2" pipes on a single 2" pipe I will have to use (2) 2" wyes in addition to the 4 x 4 x 2 wye.
Yes, the shower was wet vented by that 2" drain coming from sink in smaller bathroom. I want to add a separate 1 1/2" vent for the shower, so shower trap can be a little higher. It was really dropped in original setup, and if I use a wet vent, it will still be dropped because drain piping has to be almost exactly same routing as before due to clearances between hallway walls and 2nd floor joists. That will mean adding a vent to that 2 x 4 load-bearing (?) wall that I'm not sure is a load-bearing wall.
Attached is a better photo of old shower drain. Drywall ceiling was attached to bottom of that 2 x 4" framing. I'm sure that whoever built that framing put it low to clear that shower trap, but it's lower than code-required minimum 7' ceiling. I will have to reframe, making it 2 1/2" higher to code compliant.
I'm not sure if plumbing a new shower would be IPC code-compliant if I just plumbed it with a wet vent the way it is now. I know a trap has to be lower than its vent, and the wye in attached photo is horizontal.
Almost forgot. The 4" long turn ell will work fine with upstream toilet flange.
Yes, the shower was wet vented by that 2" drain coming from sink in smaller bathroom. I want to add a separate 1 1/2" vent for the shower, so shower trap can be a little higher. It was really dropped in original setup, and if I use a wet vent, it will still be dropped because drain piping has to be almost exactly same routing as before due to clearances between hallway walls and 2nd floor joists. That will mean adding a vent to that 2 x 4 load-bearing (?) wall that I'm not sure is a load-bearing wall.
Attached is a better photo of old shower drain. Drywall ceiling was attached to bottom of that 2 x 4" framing. I'm sure that whoever built that framing put it low to clear that shower trap, but it's lower than code-required minimum 7' ceiling. I will have to reframe, making it 2 1/2" higher to code compliant.
I'm not sure if plumbing a new shower would be IPC code-compliant if I just plumbed it with a wet vent the way it is now. I know a trap has to be lower than its vent, and the wye in attached photo is horizontal.
Almost forgot. The 4" long turn ell will work fine with upstream toilet flange.
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