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Old 12-12-2011, 09:28 AM   #1
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Vent back into stack


Is it alright to vent back into the stack in the basement? I would go to the highest point of the stack in the basement and vent back using a 3"x1.5" Y.

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Old 12-12-2011, 10:49 AM   #2
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Vent back into stack


I never do. Its not allowed per UPC

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Old 12-12-2011, 11:25 AM   #3
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Vent back into stack


Why would you want to do that?
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Old 12-12-2011, 11:36 AM   #4
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Vent back into stack


Because there is no option for me to vent. I have to run a line which means opening walls up.
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Old 12-12-2011, 11:39 AM   #5
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Vent back into stack


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Originally Posted by simonb View Post
Because there is no option for me to vent. I have to run a line which means opening walls up.
Then I would do it exactly your way, although you could probably sneak a pipe in there without tearing a wall apart. Is there insulation in it?

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Old 12-12-2011, 12:15 PM   #6
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Vent back into stack


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Then I would do it exactly your way, although you could probably sneak a pipe in there without tearing a wall apart. Is there insulation in it?
The inside walls dont line up, so i would have to use an exterior wall.
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Old 12-12-2011, 02:38 PM   #7
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Vent back into stack


Can you go up a wall, across a ceiling and up a wall?

Only need about a 1' square hole at top and bottom to get drill in to drill the hole with a right angle head. Can rent one if needed.

Does the main stack not run straight up from where you would join into it?

Could you go right up beside (or near) it and join into it in the attic or even in the wall above the highest fixture?
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Old 12-12-2011, 07:49 PM   #8
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Vent back into stack


What are you venting? if its not a heavy fixture load you may be able to self vent loop.
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Old 12-12-2011, 09:43 PM   #9
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Vent back into stack


no its not alright.... and would be a code violation in most places.

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