Can a tub drain tie into closet bend?

[thedude77]

Hello,

I'm having some outdated, corroded plumbing replaced in the bathroom of a 1922 house. The closet bend under the toilet is leaking and will be replaced and an old lead drum trap for the bath tub will be replaced. There are some issues accessing the existing shower drain pipe that goes back to the stack because it's embedded in mortar for the original tile floor. A few plumbers wanted to try to use this existing pipe but I know from experience working on the other bathroom in the house that it's probably so corroded on the inside that it will need to be completely replaced sooner than later so I want to have a brand new pipe run.

One plumber suggested running the tub drain into the new closet bend using a "heel" fitting. This would solve a lot of problems routing the pipe, but it doesn't seem quite right. Is it ok to do this? Is it code?

The stack is right behind the toilet in the wall and the tub is maybe 3 feet from the toilet. I would appreciate any advice on whether this is acceptable and if there are any issues running the drain like this.

Thanks!

[johnjh2o]

Many cods do not allow heel outlet fittings. I also assume there is no vent on the shower. What can happen is when the toilet is flushed it will siphon the trap for the shower and allow sewer gas to enter the room. A picture would help to see if there is another solution.

John

[LiQuId]

canadian code doesnt allow for connection of any fixture into a closet bend.

[EricS]

Cant put it into the closet bend, but you could wet vent it if you have the room/grade. Why not just tie it into the stack in the wall separately?