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Plumbing Code - Can I tie my bathroom exaust fan into the main plumbing vent to the outside.

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Plumbing Code - Can I tie my bathroom exaust fan into the main plumbing vent to the outside. johnnymo 10-31-2006
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Posted by johnnymo on October 31, 2006, 3:49 pm



Cool...I am fixing this house to live in, but not very long (~5 years),
so I wanna stay close to code so that people won't make me fix it when
I go to sell the house.


AppliancePartsPros.com, Inc.
Posted by JoeSpareBedroom on October 31, 2006, 3:51 pm


>
> Cool...I am fixing this house to live in, but not very long (~5 years),
> so I wanna stay close to code so that people won't make me fix it when
> I go to sell the house.
>

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.



Posted by johnnymo on October 31, 2006, 4:01 pm



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?

Thanks


Posted by Chris Lewis on October 31, 2006, 4:06 pm



> 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.

Posted by JoeSpareBedroom on October 31, 2006, 4:06 pm


>
> 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?
>
> Thanks
>

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
it.

Repeat: You are not going anywhere near the sewer pipe. Crush the idea.



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