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Old 01-22-2013, 02:23 PM   #1
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Basement Bathroom Vent Through Exterior Wall?


Plumbing/code experts-

I am looking to redo the bathroom in my basement. Currently 3 drains exist (toilet, shower, and sink) and none are tied into a vent stack. They are close to the main 4" sewer line (within 5"), but the closest 3" stack is approx 15' away along the side of a different wall. I'd like to properly vent the 3 fixtures and was curious if I could tie the vents for those fixtures into one and punch it out the side of my exterior wall, above grade (similar to a sump pump discharge), and finish it off with a nice looking cover. Is this acceptable? Reason is that there is no space above this general area to run a new vent to the attic. It makes sense to me, just don't know if it's legal...

If it's not legal, then am I allowed an unlimited horizontal run of vent pipe to reach one of the existing stacks?

Thanks for the advice...

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Old 01-22-2013, 02:42 PM   #2
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Basement Bathroom Vent Through Exterior Wall?


I don't know the answer but I would hazard a guess that no, you cannot run the vent out a wall. But that is just a guess. So let's wait for the experts.

I will be in a similar situation when we finish our basement so I'm curious to the correct code?

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Old 01-30-2013, 11:46 AM   #3
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Basement Bathroom Vent Through Exterior Wall?


Does anybody have any input on this?????
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Old 01-30-2013, 02:01 PM   #4
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Basement Bathroom Vent Through Exterior Wall?


Im an amateur and I've never seen vents through walls, just roofs. I've seen exhaust vents through walls, but not drain vents.

I'm going to say no, because the gas coming out of that pipe is flammable and could get into your windows and doors! Plus, you shouldn't put a cover on the vent. It needs to be open or it defeats the purpose.
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Old 01-30-2013, 02:07 PM   #5
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Basement Bathroom Vent Through Exterior Wall?


Quote:
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I'm going to say no, because the gas coming out of that pipe is flammable and could get into your windows and doors!
Thanks Trucon, I was just thinking the area around that vent would be pretty stinky.

So any plumbers have a comment before I run my basement toilet vent out the wall?
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Old 01-30-2013, 02:14 PM   #6
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Basement Bathroom Vent Through Exterior Wall?


anytime we were allowed by the inspectors to run a vent through a side wall it had to be extended above the edge of the roof.
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Old 01-30-2013, 03:24 PM   #7
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Basement Bathroom Vent Through Exterior Wall?


A lot of vents are run that way around here, where there are many old homes. But they still need to extend above the roof line. Another option is an AAV, if they are legal where you live.
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Old 01-30-2013, 04:18 PM   #8
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Basement Bathroom Vent Through Exterior Wall?


Thanks Guys. Confirmed what I thought. Hopefully the original poster gets it correct.
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Old 01-30-2013, 05:54 PM   #9
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Basement Bathroom Vent Through Exterior Wall?


You can run a vent as far as it needs to go to tie in to vent stack as long as u pitch it the right way

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