I am going to work on an old house that has the bathroom in the basement.
All of the drain pipes are embeded in concrete. I want to add a new
bathroom upstairs and would like to know what is the best way to locate the
sewer pipe in the floor. Any help would be appreciated.
Take up the toilet in the basement to see how the closet runs. Or locate
the vent stack and go from there. There's probably a full sized (3" or 4")
stack somewhere. Why not tie in above the concrete?
Well if you want to do it yourself, I can respect that. But at the
very least you should probably get a plumber to help you lay things
out so you don't cut off a vent or improperly tie in to the pipes that
are in the basement.
As for where to cut the floor, if you are only dealing with ONE
bathroom, code would only require a 3" pipe to service that one toilet
and carry the additional load from your tub and lavatory. In that
case, you probably have a 3" stubbed to the outside of building. In my
area, within 10-feet of the structure we are required to increase pipe
diameter to 4". Look for a cleanout outside the building. Most
plumbers try to make a straight shot to the outside of the structure.
Otherwise, you can take a jackhammer and start pounding that concrete
around the flange...just follow the pipe. Also - be sure that you know
where your gas and other utilities come in. Your gas probably stubs in
higher than that floor. But it sure would suck if you hit it with the
jackhammer and burned your house down. Of course, with insurance, you
might come ahead on that deal.
Like I said, have a licensed man eyeball the thing before you start
trying to tie in to the existing building drain. I know you probably
won't have it inspected. But at least make sure it is installed to
code. When we plumbers come behind to do work 15 or 20 years later,
when we diagnose a problem, we make a diagnoses with the assumption
that the job was inspected (and we to code).
Also, if you have pipe under slab (listen carefully EVERYONE) or
hidden behind a wall, go ahead and snap a quick digital photo of the
damn thing. Lay a tape measure on the ground too so the future will
have some way of knowing what is happening under that floor.
On Tue, 09 Nov 2004 04:04:46 GMT, "Robert Barcheski"
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.