I am trying to add a new bathroom in the attic for kids.
Here is idea 1, my doubt is that could I join the toilet drain into the laundry drain? Does that cause any issues like the smell?
I am new to DIY but would like to learn new things. I believe that the laundry rain pipe and main stack pipe would be connected somewhere in the ground of the basement. I plan to take hot and cold water lines also from the laundry room to the attic.
Please help with any insights or ask me any questions for clarification.