I am converting a shower to a bathtub, and need to move the drain. As you can see in the pictures, I have already removed the shower, and ripped out some of the concrete slab. Instead of digging up more concrete (which seems to be in two layers, is quite thick, is reinforced, and is difficult to remove with a sledgehammer), I would like to:
1) cut the existing pipe so that I can
2) install a 90 degree elbow in it and
3) use a 1.5 inch pipe to reach the tub drain, approximately 1.5 feet from the elbow.
4) install a p-trap
5) insert a 12" plastic box
6) pour concrete
Is the 90 degree elbow ok?
Also - in order to access the tub to connect everything up, I am going to have to cut a hole in the wall. This is an exterior wall in the back of the house. I'd like to install an access panel to cover up the hole - so that I can get to it later if I need to. What do I need to keep in mind regarding this access panel?
Note the vent behind the toilet that is barely visible in one of the pictures.
Also, the shower was 60". I've measured the space, and it is about 60 1/4" wide, so a tub should fit there fine.