Alternative Way For Vent Stack?

 
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Old 07-18-2017, 10:26 PM   #1
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Alternative Way For Vent Stack?


We just finished a remodeling bathroom job, but found there is no existing vent stack. AAV is not allowed in MA.
House will sell soon, will this affect the home inspection?
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Old 07-18-2017, 10:35 PM   #2
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Re: Alternative Way For Vent Stack?


How did it pass plumbing inspection from the recent remodel ?

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Old 07-18-2017, 10:58 PM   #3
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Re: Alternative Way For Vent Stack?


Quote:
Originally Posted by Victoria Chan View Post
will this affect the home inspection?
I sure hope so.

And for what it's worth, an AAV is not a substitute for a vent stack. It is, at best, a substitute for an individual fixture vent. And not the best one at that. And not allowed in many, many areas.



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Old 07-18-2017, 11:02 PM   #4
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Re: Alternative Way For Vent Stack?


Well Victoria, you might be held accountable for the missing vent stack. It is not fair I know, but it may go that way.

Ask the home owner if they are willing to pay for putting one in. I would think that any half-way decent home inspector would catch that.

Andy.
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Old 07-19-2017, 03:45 PM   #5
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Re: Alternative Way For Vent Stack?


Quote:
Originally Posted by ScipioAfricanus View Post
Well Victoria, you might be held accountable for the missing vent stack. It is not fair I know, but it may go that way.

Ask the home owner if they are willing to pay for putting one in. I would think that any half-way decent home inspector would catch that.

Andy.
I think she's the seller. The last plumber I hired did an AAV for the whole basement bathroom. Apparently it's allowed here. He won't be rehired. The sloppiest and laziest SOB I've ever met.
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Old 08-07-2017, 12:07 PM   #6
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Re: Alternative Way For Vent Stack?


I would think there has to be a main vent stack somewhere in that home's attic. I would definitely try to find a continuous wall to run a vent up for the bathroom and tee into it or if worse came to worse, cut in a neoprene flashing in the roof and run a vent. That's another roof penetration that would be nice to avoid, though.
As for the AAV's, our inspectors frown on them but usually allow us some leeway for kitchen island vents or adding in a laundry in old houses. I don't recommend them for venting toilets or whole baths for sure although some guys do it from time to time and they work.
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Old 08-09-2017, 01:14 PM   #7
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Re: Alternative Way For Vent Stack?


Usually the vent stack has to routed above the roof to be compliant. Venting into the attic not code compliant. If you can't see it on the roof then you have a problem.

Rod
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Old 08-28-2017, 07:04 PM   #8
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Re: Alternative Way For Vent Stack?


Well, late update, sorry.
We are trying to determine whether this is caused by the vent. There is definitely vent close to the bathroom. We don't want to take risk if we install a new vent, the problem is still existing. So we tried drain cleaner two nights, the sound has reduced a lot. But it will come back really really soon(about 3-4 days). The water supply and drain for the bath sink have two 90 degree elbow.

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