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It turned out nice. And yes, although I don't have any pictures of it, the shower does have a vinyl shower liner, sloped properly, with open weep holes around drain, reinforced corners and threshold with redguard, and plastic vapor barrier behind the hardiboard, from the bottom to the top. It's...

Granite threshold

And another

Here's the rest.

Thanks John, will do. Just copied and pasted that one, but yes I will use a glued trap.

So like this? The main drain is actually back behind the tub, so it will span the distance of the floor joist. I can use 1.5" for this right? Or do I have to use 2"?

I found my old thread here and thought I would post pictures of what I ended up doing.

Is there any possible way to fit a tub drain and p-trap into a 6" (5.5") floor joist? This bath is on a second floor and the joists are only 5.5"s deep. I'd rather not have to fir down the ceiling in order to fit the plumbing in. I measured a 1.5" p-trap and it was 6" deep just by itself...

Great. Shouldn't I use a wye instead of a tee?

I think I know the obvious answer here, but I'll ask anyway. Can a vent pipe be routed down? Due to a sloping roof line, once the vent reaches 6" above the flood rim, it will have to be sloped down into the existing vent stack. I know that liquid will fall either direction but gases could be...

Yes, common sense told me that an AAV will do nothing to combat positive pressure. But then I thought, it would take a heck of a large and sudden pressurization of the waste lines in order to blow out the 2 existing vent stacks and still force gases up through the trap.?. The part I still don't...

I understand John, that it would be exposed under the sink above the p-trap. For some reason I feel like there's a stigma with AAV's, and that they are frowned upon using.

That would definitely be easier, I'm just not familiar working with them.

Yes sir, I wish I could. The problem is that this bathroom has a sloped ceiling. It is part of a 1940's attic that was converted to living space many years ago. The back wall is about 4' high, enough to accommodate a toilet and the back portion of the shower, but not tall enough to support a...

Thanks John, So a lav that is 36" above the floor would require a vent to be 6" above the flood rim before turning horizontally; making the vent turn at a minimum 42" above the floor. That definitely kills my hope of venting close to the attic side wall. I guess that means I will have to...

How about venting here between the floor joists, closer to the traps?

This bath is on a second floor and I'm trying to tap into the existing roof penetrations. The wall behind the toilet is attic space, so I'm running the main drain right behind this wall in the attic. Normally I would vent the vanity and tub on their own wall, but in this situation I would have...

Can I vent fixtures where they meet, or just before where their arm meets the main drain line? Due to existing roof penetrations and stacks, it would be much easier to vent these fixtures on the top side of bathroom rather than on bottom side and running vent lines all the way around the...

Shower is tiled and has a lead pan. Is there any way to repair failure point at drain without tearing out the whole shower? Everything is in surprisingly good shape.

I've got an old shower stall that appears to be 40+ years old. Its got the metal lathe on the walls with concrete floated over it and tile laid on top. Whoever built it did a dang good job because the only place it appears to be leaking is around the drain and a little down the copper supply...