"Stinger" writes:

I own a town house and have a small drain (for laundry) located in a
first floor utility room. I am trying to vent my dryer and noticed
(while opening the drywall up to see what I had) the drain has a vent
that goes to the roof (two stories). Its plastic probably about
four-six inches in diameter. Is this for sewer gases or something?

Yup. Stack pipe.

http://www.hometime.com/Howto/projec...um_1.htm#waste

Is that why it goes to the roof? No other drains are hooked up to
it,-- unless underneath they all flow into one-- and that is the
vent??

You should find other connections to it somwhere along the line. It'd
be odd to have a stack pipe for just one drain.

I didnt want to run a seperate vent for the dryer but it looks that
way huh?

Yeah--I can't imagine venting hot moist dryer exhaust into the stack
pipe would be a good thing. If I were a betting man I'd say it'd be a
big steaming code violation, and possibly a fire hazard to the dryer
as well.

--
Todd H.
http://www.toddh.net/