Building and Construction - Basement bathroom setup/drain

Author

Basement bathroom setup/drain

beerguzzler50@yahoo.com

2007-02-12, 1:26 pm

I am in process of planning a new bathroom (sink, toilet, stand up
shower) in my unfinished basement (soon to be finished). The house is
relatively new and the basement was planned for a bathroom as there
are 2 drains located close together. One is flush with the floor with
a plug in it. I am pretty sure that is for the toilet and all I need
to do is put a inside fitting flange on it. The other is a 12x12
framed in hole in the cement floor with a horizontal pipe sticking
halfway into the framed box. I am assuming that is for the shower and
I have to fit my own p-trap for that. My question is where should
the sink drain too? Does the sink drain share the shower drain and is
my setup normal? I am thinking the shower pan is supposed to go right
over the 12x12 boxed drain after being filled with mortar...but don't
get how to do the sink drain. I figure there is a common answer since
there is even a vent pipe brought down to this area already.

thanks in advance for your help.

beerguzzler50@yahoo.com

2007-02-12, 1:26 pm

On Feb 12, 2:04 pm, Speedy Jim <v...@nls.net> wrote:
> beerguzzle...@yahoo.com wrote:
>
>
> Make a sketch or post photos (on a photo site).
>
> Does the vent just "end" above the floor or does it
> go into the floor? Is it possible that provisoon for
> the sink is buried in a wall? Where are the H/C supply pipes?
>
> Jim

Sorry, I may have caused confusion in my description. There is a PVC
pipe in the ceiling of the basement (it is capped off) that leads to
the vent that goes through the roof. I have H/C supply pipes running
overhead that I will have to tap into for the bathroom. There is a
main drain pipe that runs along the wall (6" or 8" PVC) and into the
floor (to the septic) that I guess I could tap into...but thought
maybe I should be using the shower drain instead.

Dennis

2007-02-15, 5:25 pm

First, this requires a building permit (for your own protection at a
minimum).

Now, the water closet and fixture drain should empty into a sealed sump with
sewage-ejector pump (which is vented through the vent you found leading to
the roof.)

The 12x12 box and pipe probably could be used as a common-vent to drain the
lavy and shower. You would size the lavy trap arm at 1-1/4" (vent with an
air admittance valve) into a 1-1/2" drain. The shower connects lower down.
Also need a backwater valve and full-size gate valve. Most likely, the lavy
would install over the 12x12 box with the shower next to the lavy.

There is also a second type of basement arrangement that you should also
consider. It consists of a special upflushing toilet with connections for a
lavy and shower. http://www.naturalhandyman.com/iip/infplumb/infupf.shtm

And lastly you could consider the Japanese Toto toilet that analyzes your
urine, takes your blood pressure and then sends that information to your
doctor via a built-in modem. <ahem>

<beerguzzler50@yahoo.com> wrote in message
news:1171308136.268490.125200@k78g2000cwa.googlegroups.com...
> On Feb 12, 2:04 pm, Speedy Jim <v...@nls.net> wrote:
>
> Sorry, I may have caused confusion in my description. There is a PVC
> pipe in the ceiling of the basement (it is capped off) that leads to
> the vent that goes through the roof. I have H/C supply pipes running
> overhead that I will have to tap into for the bathroom. There is a
> main drain pipe that runs along the wall (6" or 8" PVC) and into the
> floor (to the septic) that I guess I could tap into...but thought
> maybe I should be using the shower drain instead.
>

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