looknohands
New Member
I have a bit of a tricky situation:
I'm remodelling a bath room where I moved the toilet away from its original location, to build a shower on that spot. The old flange is embedded into the concrete floor. The concrete is insanely tough! Since I can't take out the concrete, I need to run the new 3" toilet drain into the old flange which has an inside diameter of 4".
The tricky bit is that it looks like there is no such thing as a 4" to 3" adapter that fits inside a 4" pipe end. I can only find such an adapter to fit in the female end of a 4" pipe, but I basically need one that fits inside the male end of a 4" pipe. I tried prying off the top of the flange, but it all seems glued together tightly.
The solution I have in mind is this: the horizontal 3" pipe will run towards the flange with the proper slope, and drop down into it with a 90 degree elbow. The female end of that elbow fits quite nicely into the 4" hole. However: there is a little bit of play, about a 1/16th of an inch. Therefore, I would need a good gap-filling, non-brittle, shock-absorbent epoxy to connect the elbow inside that flange. (Anything you can recommend in particular?)
My question: is there a better solution? If I were to do this, were I to violate plumbing code? I have studied the plumbing code inside out and I know how to meet all the various rules with regards to venting and what not, but this detail I am not so sure about.
I am really looking for a way of tapping into that flange without taking out the concrete. Any tips are really appreciated...
Thanks so much,
- Erik
I'm remodelling a bath room where I moved the toilet away from its original location, to build a shower on that spot. The old flange is embedded into the concrete floor. The concrete is insanely tough! Since I can't take out the concrete, I need to run the new 3" toilet drain into the old flange which has an inside diameter of 4".
The tricky bit is that it looks like there is no such thing as a 4" to 3" adapter that fits inside a 4" pipe end. I can only find such an adapter to fit in the female end of a 4" pipe, but I basically need one that fits inside the male end of a 4" pipe. I tried prying off the top of the flange, but it all seems glued together tightly.
The solution I have in mind is this: the horizontal 3" pipe will run towards the flange with the proper slope, and drop down into it with a 90 degree elbow. The female end of that elbow fits quite nicely into the 4" hole. However: there is a little bit of play, about a 1/16th of an inch. Therefore, I would need a good gap-filling, non-brittle, shock-absorbent epoxy to connect the elbow inside that flange. (Anything you can recommend in particular?)
My question: is there a better solution? If I were to do this, were I to violate plumbing code? I have studied the plumbing code inside out and I know how to meet all the various rules with regards to venting and what not, but this detail I am not so sure about.
I am really looking for a way of tapping into that flange without taking out the concrete. Any tips are really appreciated...
Thanks so much,
- Erik