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The Punisher · Mar 4, 2009, 03:01 PM

This is a second floor washroom, I am planning on doing some major home renos and would like my washroom to be redesigned, I want to move the toilet to another location, however to place it there the drain pipe has to cross the joists.
How does one do that? Cut into the joists? Create a cavity like they do for stairs, and have the joists end there? Have a look at my pic below to get an idea of what I want to do..

RED DOT = Current Toilet Location
GREEN DOT = Drain Pipe
BLUE DOT = New Toilet Location

massplumber2008 · Mar 4, 2009, 04:18 PM

Hi Punisher...

What size are your joists? Let me know.

In oder to do this you will need to DRILL holes through the joists using a HOLE-SAW of appropriate size (close to 4" hole) and a RIGHT-ANGLE DRILL. You can rent a right-angle drill from any rental store.

You cannot NOTCH joists... ok?

Let me know more here...

MARK

The Punisher · Mar 4, 2009, 04:28 PM

Thanks for the reply, I have yet to actually start the renos and rip out the floor so I am unsure on the size, It is an old house so I would think they are 10" or 12".

I never knew such tool existed, I won't be doing the work myself, I plan on someone for the job, but I wanted to make sure I knew it was possible. I always wondered how it was done.

I assume the whole would be 4" and the pipe that goes through is 3"?

Still how would one get a pipe that is say 4" feet long, into the wholes? I assume it would have to be little pieces and then all joined?

massplumber2008 · Mar 4, 2009, 04:36 PM

Correct... a 3" pipe is about 3.5" on the outside, so want a 3.75" hole or so.

Also correct, you use couplings to join the pieces...

10-12" joists will work fine here.

The Punisher · Mar 4, 2009, 04:37 PM

Super, Thanks for the info. I was a little worried that I would have to keep the toilet where it is...

Cheers.

massplumber2008 · Mar 4, 2009, 04:39 PM

Good night!