Shower Drain Rough-in Advice

[Mark629]

Hello,
Ive been going to this forum for years and it has helped me out quite a bit, thank you all. I am installing a bathroom in my basement and need a little advice please. The house was roughed in for a toilet and a sink but I want to add a shower and cant figure out how I would vent it with the layout I have. From my picture the big red dot is where I plan on putting the drain and the vent is fairly close but the framing is in the way. Does anyone have any suggestions on how I can vent the shower without taking down the framing? The waste stack goes towards the front of the house which is the right side of the picture.

Thank you

 

[Jadnashua]

What are the two vertical PVC pipes there now? My guess is that the one on the left is drainage from the upstairs, but it looks like the one on the right might be a vent, but there's a T going off about 3' off the ground into another room. Again, I'm guessing, but maybe a washing machine? If so, then the toilet and the branch off (maybe for a sink?) are not vented. Essentially, once a pipe becomes a drain, it is no longer a vent with few exceptions.

 

[Sponsor]

 

[Mark629]

Thanks for you reply and sorry about that, I should have explained those pipes. You are correct the one on the left is the main stack and goes upstairs. I believe the one on the right is the vent and the top tee isnt connected to anything, theres a cleanout plug in it. The lower tee I think was the builders idea to have that as a drain for a sink. I was going to replumb that and have it face the other way so it can go to a vanity to the right side of the toilet.

 

[Terry]

For a shower you will need to wye off in the ground, add a vent for that, which can re-vent to the lav vent.

 

[Jadnashua]

Then, you can run the shower vent up the wall after breaking some concrete to get access. It needs to go at least 42" above the floor, or 6" above whatever else might drain into the pipe below before it can join that existing vent line as long as there's nothing else above it that could drain into that pipe.

Depending on the diameters of the pipe involved, the shower MIGHT be able to be wet vented through the sink connection, but I'm not positive on that. That has to happen before the toilet goes into the line, though.

 

[Mark629]

Thanks a lot guys, I guess its time to break some ground.