Hello - I bought an older house and I am renovating and making my half
bath a full bath. I wanted to install an exhaust fan in the bathroom,
but it is not very convienent to send it to the side of the house and I
don't won't to bother cutting a hole in the roof. So, I was wondering,
since the main air vent to both bathrooms is directly above my new
bathroom, can I have piece of PVC installed so that my exhaust vent
blows into the air vent? Is this code worthy?
Thanks for the suggestions...
Yet another useless response from the succo company that adds nothing to
the answer provided by trader (an probably numerous other people) in a 3
year old thread with the OP long gone.
The succo company response is spam from a plumber. With a response this
stupid it is a company for anyone in Louisiana to avoid.
No. Except there's a water-trap, you can only connect draing piping to
outside, via drain line or vent. Sewer gas can be explosive, and it's
that contractor cracks a gas main near a sewer line, with natural gas
getting into house with dry trap. With house coming apart in a
This was a block away.
So you see why sewer venting is not a "convenience" thing.
Ok...I am no plumber and makes good sense, but is there enough pressure
in the air vent to push the "sewer gases" sideways and down to my
exhaust fan. I was thinking as long as I don't create a direct route I
would be ok. I just wanted to tie on to the side, kind of like my sink
is right now.
Thanks for the suggestions. I guess I will do a little more research.
The flex hose from mine is wired to the inside of one of the existing roof
vents. It works fine. When I re-roof soon, I'm having it routed to its own
vent, but you could get away with jury-rigging it, if necessary.
Be sure to wire the pipe as far up in the vent as possible, so moisture is
blown all the way out. Otherwise, it's possible to have condensation on the
inside of the metal vent, which may drip back down again. I wondered about
this with mine, so I've observed while the shower as on full blast. You
should do the same when you're done.
Yea, that is why I thought the idea was a good one, b/c it is a very
short distance, just up 1' and over 1' ft, but the air vent still has a
way to go, so I thought if there was condensation, it is going to drain
down the air stack and into the sewer.
I just want to make sure you guys don't think the sewer gas is going to
make its way past my exhaust fan?
If you interconnected the bathroom vent to the DWV vent, and
if the exhaust fan isn't running, why wouldn't it get
past? It's a _gas_, remember?
Would just need a minor vacuum in the house (eg: woodstove or
stove vent) to make it a high volume blast of stink.
Chris Lewis, Una confibula non set est
It\'s not just anyone who gets a Starship Cruiser class named after them.
You're not going to attach it to the sewer pipe or vent. I'm talking about
the attic vents. If you don't have one nearby, it would really be worth your
money to install a vent specifically made for the fan, or have a roofer do
Repeat: You are not going anywhere near the sewer pipe. Crush the idea.
I sure hope you are talking about one of the attic vents and not the
sewer vent, Joe. Sounds like Johnny wants to hook into the sewer vent
pipe stack which will cause all sorts of trouble when he wants to sell
the house. Not to mention that "wonderful" odor he'll be trying to track
down in his bathroom on those occasional days.
My advice Johnny, is don't tap into the sewer vent stack unless you
intend to use it to dump sewage into.
So, what is the difference in hooking up a sink to the side of the
sewer vent than hooking up a piece of flex hosing that goes down.
Maybe the trap? Is it b/c there is always water/gunk in the trap not
allowing the gases to go up through the sink?
My exhaust fan hose is always going to be dry so that would be a
problem. Hmm....maybe not such a good idea?
Awesome...good ideas. Idea is dead. Makes sense. I thought I was onto
to something, but as usual, there is a reason why it is not done this
I was just testing you guys....jk. have a whole house fan, and the
minute I turn that sucker on, I can see it sucking the air from my
bathroom including the air in my exchaut fan vent when the fan is not
Back to the drawing board. I appreciated every ones ideas and
suggestions. Seems like a really dumb idea now that I look back.
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