Re: installing bathroom dwv... how much cut in subfloor?
Posted by LonnythePlumber on May 03, 2003 at 03:43:15:
In response to Re: installing bathroom dwv... how much cut in subfloor?
: The best suggestion would be to hire a plumber. You have a lot of questions and the answers may depend on how your house is built.
: :
: : My townhouse 3rd floor has a full bath.
: : I'm trying to build a new bathroom which will be located on the other side of the wall back-to-back:
: : Which means that the sink water pipes can be tapped back-to-back, and shower water pipes can be tapped back to back,,.
: : but i'm wondering if the toilet drain-pip can also be tapped in similar fashion as well
: : or do i need to run individual toilet drain lines directly to the main-stack?

: : As for the vent, i figure i can just run it vertically up to the ceiling and connect it back to the main stack since it's the top-most floor anyway.

: : Also, How do actually access the drain pipes underneat the subfloor? I ask this question because I get the feeling that I can't just freely saw through the subfloors from the top as there are supporting nails that hold up all the toilet/tub/sink fixtures in the other side of the wall. If I saw through that subfloor, it would have no support.

: : On the other hand, I also don't want to access it from the floor below since doing so will destroy the kitchen-work below.
: : Any suggestions would be greatly appreciated...

You are talking about water piping and then you jump to the toilet drain piping. You can do the water. Drains are more of a challenge. You cannot tie one toilet drain into another toilet drain without a vent.
You can run your drainage by taking up the floor or from the ceiling below. I prefer the ceiling if I need to drop down below the joists but I usually do it from the floor because that room is getting remodeled anyway. I don't understand your explanation of why removing one subfloor would affect another. LonnythePlumber

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