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Old 07-31-2010, 09:38 PM   #1
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sink vent


see attached picture - specifically related to the relative position if the vent line. Can I do this ??
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Old 07-31-2010, 10:41 PM   #2
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no, not by the plumbing code I work under. You need to have the vent above the center line of of the horizontal drain. Turn the elbow into a sanitary tee and use the tee's top inlet your vent.

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Old 08-01-2010, 12:01 AM   #3
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much thanks

another option ( which I do not think is "proper" )
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Old 08-01-2010, 08:53 AM   #4
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Quote:
another option ( which I do not think is "proper" )
Looks proper to me.
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Old 08-01-2010, 08:54 AM   #5
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Still wrong. vents must rise vertical to a point 6" above the flood level rim of the highest fixture served before they can run horizontal.
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Old 08-01-2010, 09:02 AM   #6
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OK in my neck of the woods, AHJ alows it all the time but it is not the prefered method.
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Old 08-01-2010, 09:26 AM   #7
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No, not under anybody code will that fly. That horizontal bit under the sink can not be horizontal unless it is 6" above the rim of the lav. Any inspector that lets that fly needs to spend more time with his code book and less time at the coffee shop.
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Old 08-01-2010, 10:30 AM   #8
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thanks to all

I think my "solution" will be to notch out the studs under the window and maintain a 45-60 slope on the vent line (and use some "stud-shoes"). This will ultimately result in the p-trap being 4-6" above the floor of the sink cabinet.
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Old 08-01-2010, 10:34 AM   #9
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sink vent


I had double windows over my sink & extending past each side
Simply wasn't any area to run a vent pipe up & out

In cases like that is it better to:

Not have a vent

Use an AAV

Run to one side & then up ?
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Old 08-01-2010, 11:04 AM   #10
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sink vent


Increase the size of the stack to 2" if the developed length of the 1 1/2" trap arm is too long to meet code and offset it. I hate AAV's and will ( ok have) fired plumbers who used them. Stack venting is also an option.
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Old 08-01-2010, 03:57 PM   #11
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sink vent


If you use 2 45s where you have the ells and go 6in above the sink before you go horizontal you will ge o.k.
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Old 08-01-2010, 04:58 PM   #12
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much thanks to all

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