View Full Version : secondary stack

11-09-2004, 02:42 PM
I am building an addition on my house. The existing house has
a powder room which is serviced by a secondary stack. The addition
plan calls for a bathroom (shower, sink, toilet). The new bathroom
will be located right beside the existing powder room such that
the new toilet is approx 7 feet from the existing stack.

I am not totally sure if the stack I have referred to is a secondary.
This is because it is located where the drain leaves the house to
the city sewer and therefore it could just be a small stack.

Question: Can I use the existing secondary stack for the new bathroom

Any info is appreciated.

11-09-2004, 06:23 PM
You can tie the vents from the new bathroom into that stack, in most cases, but it will not vent those new fixtures by itself.

11-10-2004, 10:34 AM
There is way too much we don't know to advise you. The layout of the new bathroom and how your existing plumbing is run will determine what you can do. I am guessing that it will not be nearly as straightforward as you want it. You need a plumber to advise you.
The Pipewench