It's time for the worn-out bathroom to get a makeover. I'm planning to handle the demolition myself and move the shower drain closer to the wall so it can be inside a foldable shower wall in the future. I also plan to build up drywall on the walls before a company comes to level the floor and lay waterproof flooring and wall covering.
Demolition and drywalling aren't an issue, but I'm considering how to relocate the shower drain. The concrete floor is 15-25 cm thick (haven't measured precisely), and there's a finished basement underneath the bathroom. But if I remove the existing cast-iron drain and want to move it closer to the wall, how do I do that? Should I drill a hole exactly the size of the pipe, or create a larger hole and then pour concrete to fill around it?
Currently, the drain is 70 cm out from the wall, and I want it about 30-40 cm from the wall. That distance shouldn’t be too close for a shower drain, right?
Has anyone done this before and has some pictures or a post with pictures to show the best way to proceed? Or can someone describe in more detail how to go about relocating it the easiest way?
Also, how do I handle the area where the old drain was when I need to fill that hole? The basement ceiling isn’t completely flat, so I'm unsure how to seal between the ceiling and sheet to prevent concrete from seeping down and dripping on the basement floor.
I'm attaching 2 pictures so you can see how it looks now. The plan is to replace the entire stack with new pipes from both the small toilet and the bathroom (main toilet) and then connect the new pipes to the cast-iron pipes down in the floor somewhere.
Wall-to-wall behind the shower mixer is a small toilet with a toilet and a sink. So all the sewer stacks come out at roughly the same place in the basement. I'd like to make it less bulky and try to get everything a bit closer to the basement wall so that it doesn't take up as much space in that room.
I hope you understand what I mean, otherwise, let me know if you need more pictures or information.
