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Yeah I've got one actually. Special ordered but now I dont think I'll need it. Unless I decide to box out that joist. Think I'm better off just lowering the ceiling a couple inches.

I was going to do but I'd have to come out the right side of that fitting rather than the left. The stack is on the gable side of the house so there is a joist in my way. If I box it out and use that fitting I would have to cut a hole in the header that I just made to get the shower pipe to...

Will draining and wet venting this shower right above a toilet present any problems. The shower will be 2 inch and tie into the vent stack using a sanitary tee. Then directly below it I will go to three inch and the toilet will tie into the stack.

I need some help figuring out how to plumb this. The 2 inch pipe to the right is for the shower and the hole is going to be 3 inch pipe for a toilet. I will be sistering the joist with the hole in it to repair it. This is a first floor bathroom in a story house above a crawlspace. It's not...

Even though both lines meet a matter of inches from a vent?

Sorry, I should have been more clear. The 2 inch pipe to the right is the shower drain which already has a p trap. I need to take the toilet drain the complete opposite direction of where it's going now which means going under that joist. Would tieing in with that heel inlet present any...

I am putting DWV pipe right behind the toilet it is serving. I need to tie a shower drain into and I need to know the best way to do this. This will not be inspected. Included a picture of my current situation. If I go straight down from toilet and 90 into the main pipe I will not have room...

I thought you said tying it into below the second floor would work?

So took a picture of the plumbing in my crawlspace and drew a diagram of the plumbing that will affect my project. What do you think?

Yes.

It ties in just near that corner where you pointed to in that picture I posted. It then goes to crawlspace.

Im sorry if you interpreted my response as me trying to argue. Im just trying to understand. You've been very helpful and I was just asking if you had a plan in mind. Should I just take a 3 inch pipe and run in down along the existing and y it in below the second story? Will I need to run...

Thanks for those diagrams.

Ok. That makes sense. I guess I got confused when I saw stack venting diagrams through my research and they had bathrooms on top on bathrooms but they all had dry vents which prevents what you just described. Is that correct? What should my plan of action be? Do you need more information?

This bathroom has been finished for a couple years. I didnt plan on finishing the attic then but yes the 3 inch vent pipe is right behind that corner where the pipes go. It comes straight up from crawlspace to the attic.

Took this photo awhile ago of my plumbing in the bathroom below the proposed attic bathroom. Everything drains into that pipe that comes out the attic. There is also another bathroom on the second floor. From what I can tell both of these full baths go to this pipe. They are also vented...

Ok that's what I was afraid of. Haha. That pipe goes down and connects to my plumbing in the 2nd story bathroom just below it, just like you have in the diagram and then goes to the crawlspace. So would the plan then be to take my 3 inch drain from the attic bathroom run it along the...

They are 2 by 8s. The whole house is 2 by 8s. Is it different for a third floor or updated code since the 80s.

I am finishing my attic and I need some help making sure I install the drainage and venting for the bathroom correctly. In the picture I plan on putting the bathroom as close as I can to the water heater and the ducts you see. Picture a rectangle pushed up against the water heater and the air...