Vent pipe that goes no where?
#1
08-25-18, 06:27 PM
Vent pipe that goes no where?
While installing a new vanity mirror in the 2nd floor bathroom I decided to see what was behind the wall with my inspection camera. There's a PVC pipe that runs vertically; I can't tell if it comes from the sink below but assume so. The pipe just stops about 5 feet or less above the sink and appears to be capped? It's difficult to tell.
Is this normal?
Is this normal?
#2
08-25-18, 07:19 PM
Group Moderator
No, not normal. But what you think is a cap might be an AAV (Air admittance valve). Even then, an AAV should not be used inside a wall.
#4
08-25-18, 08:36 PM
Group Moderator
Extend it out the roof or tie it into an existing vent that can handle an additional fixture inside the attic.
#7
08-30-18, 04:19 AM
Greetings Mainer,
I'm not a pro, but the idea that it is hidden inside a wall implies they were hiding something they shouldn't. If you can handle cutting a hole to inspect I would say do it, and then you know what is there. Then some pictures and the pros here might be able to advise on the next step.
Makes one wonder what else they covered over?
It could also be a point where they stopped and just never got back before the drywall. Could even have holes above already drilled. One can always hope
.
Bud
I'm not a pro, but the idea that it is hidden inside a wall implies they were hiding something they shouldn't. If you can handle cutting a hole to inspect I would say do it, and then you know what is there. Then some pictures and the pros here might be able to advise on the next step.
Makes one wonder what else they covered over?
It could also be a point where they stopped and just never got back before the drywall. Could even have holes above already drilled. One can always hope
.Bud
#8
08-30-18, 05:05 AM
Group Moderator
The whole reason sewer gas vents outside is so that we don't breathe that air. The space in the wall is still inside the house if it's an aav. And if its a cap, then it's not really acting as a vent and whatever fixture it is supposed to be venting might drain slower or gurgle as it tries to draw air.
