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Old 11-25-2008, 10:00 PM   #1
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do I really need 2 stack vents?


Hi, we are doing some remodeling including adding a dormer and second bathroom upstairs and I have a question regarding the stack vents in our house. Currently there are two stack vents but I'm not sure if two stack vents are necessary. It would be great to eliminate one of them because stack #2 is in a pretty inconvenient place as far as the new dormer roof is concerned.

Thank you in advance for any advice....
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Old 11-26-2008, 11:07 AM   #2
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do I really need 2 stack vents?


What a mess. That photo doesn't tell much about the vents though... those are drains. The vents come off above the fixtures. You may be able to tie them together in the attic but I imagine that if that were a simple task there would not be two of them to begin with.

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Old 11-26-2008, 12:02 PM   #3
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do I really need 2 stack vents?


OK, the picture doesn't tell the whole story...here's a quick schematic of the plumbing in the house...

I'd like to get rid of what I label "Stack Vent #2" if possible, but I don't think I'll be able to...
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Old 11-28-2008, 01:45 PM   #4
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do I really need 2 stack vents?


Number 1 I am not a plumber and I did not stay at a Holiday Inn Express either. I do know that it depends on your local plumbing code. What you have drawn looks like a wet stack, meaning that your vent and drain line are one. I dont have a good answer for you exept to check with your local building department, they will let you know. Just make sure the rest of your project is on the up and up. I am in the Albany, NY area and as a local contractor/ do it yourself-er can tell you it is easier in the long run to pay the 100-150 permit fee up front than get caught in the end.
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Old 11-28-2008, 01:57 PM   #5
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do I really need 2 stack vents?


from your drawing it looks like you didn't drawthe vent stack because there should be a vertical above each unit then a horizontal. it doesn't even look vented those are just drains
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Old 11-28-2008, 09:38 PM   #6
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do I really need 2 stack vents?


Quote:
Originally Posted by chad4290 View Post
from your drawing it looks like you didn't drawthe vent stack because there should be a vertical above each unit then a horizontal. it doesn't even look vented those are just drains
They very well may be wet vents.

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