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Old 03-11-2013, 08:52 PM   #1
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sanitary tee on back for dry vent


All,

Is it permissible to use a sanitary tee on it's back on a horizontal drain if it is solely for a dry vent only ( no waste ). The horizontal drain is on the second floor starting with the toilet, dry vent, then 2 fixtures downstream on wyes then down to basement (septic).

I would prefer the wye for the vent as well but it is my main stack and there is no room for the wye or combo even when rolling it. The stack continues to the roof.

If it is permissible does anyone know the UPC code to reference to?

Thanks!

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Old 03-11-2013, 09:42 PM   #2
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sanitary tee on back for dry vent


Under the IPC no go UPC ? not sure but don't think so, but am sure someone will correct if i am wrong,,, this subject is always coming up

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Old 03-11-2013, 09:44 PM   #3
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sanitary tee on back for dry vent


Under the IPC it is OK as long as your vent from the tee does not go horizontal until it is a min. of 6 inches above the flood level rim of the fixture your venting.
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Old 03-11-2013, 09:46 PM   #4
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sanitary tee on back for dry vent


our inspectors says yes it is allowed for dry vent
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Old 03-11-2013, 09:48 PM   #5
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sanitary tee on back for dry vent


If the tee is part of the drain line itself then typically the answer is no. But it is generally excepted by my inspectors(UPC) as long as the dry vent is vertical and a wye cannot be used due to structural conditions
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Old 03-11-2013, 09:50 PM   #6
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sanitary tee on back for dry vent


I think most of the plumbers chimed in on this one
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Old 03-11-2013, 09:53 PM   #7
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sanitary tee on back for dry vent


Quote:
Originally Posted by Ghostmaker View Post
Under the IPC it is OK as long as your vent from the tee does not go horizontal until it is a min. of 6 inches above the flood level rim of the fixture your venting.

Not sure where you got that info but its not allowed under the IPC. the only time we can use a sanitary on its back is when circuit venting, now that being said some inspectors will let it ride if your not VTR its a field inspectors call. however i will look it up under the IPC ..here in Florida we also have to use the Florida building code that covers sections the IPC leaves open, under the Florida building code absolutely to sanitary on its back regardless

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Last edited by Javiles; 03-11-2013 at 09:57 PM.
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