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Old 01-11-2010, 12:15 PM   #1
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venting question


are there any disadvantages to using automatic vents instead of a more conventional system aavs

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Old 01-11-2010, 01:43 PM   #2
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venting question


depends on your plumbing code jurisdiction.most will not allow the use of aav.

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Old 01-11-2010, 02:42 PM   #3
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venting question


Most of the codes allow the automatic vents, but for whatever reason, a lot of towns do not. This is the case with my town. The inspector said that my town uses the 2006 NSPC (National Standard Plumbing Code), and does not make any town specific amendments to it. Section E.8 of the NSPC is what allows "Air Admittance Valves", yet for whatever reason, my town inspector said he won't allow it. Go figure.
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Old 01-11-2010, 03:34 PM   #4
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venting question


in the IL.plbg. code it definitely says they are not to be used or any type of mechanical device.
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