Anyone know what this vent pipe is?


Old 05-30-20, 11:14 PM
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Anyone know what this vent pipe is?


I decided that I wanted to change the three vent covers in my living room.

It's a tri-level home, the lower level having concrete floors. The attached image shows the concrete slab, with a pipe running below it, and a rough cut out. I'm hoping it's nothing hazardous!!!

Thanks in advance.


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Old 05-31-20, 05:32 AM
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Its old asbestos sewer pipe.. looks abandoned..

just leave it...
Old 05-31-20, 06:03 AM
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In use



thanks for the reply.

its not abandoned - this pipe is delivering hot/cold air to our main living room, year round.

The house was built in 1972 and all rooms with suspended floors have aluminum ducts.

They used asbestos sewer pipe? Now Iím panicked, we have been here for 11 years.

Old 05-31-20, 06:42 AM
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Only way to tell is to take a sample and get it tested
Old 05-31-20, 11:14 AM
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That looks like transite pipe which can contain asbestos.
Transite ducts
Old 05-31-20, 04:15 PM
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Do all the supply and return aluminum air ducts for the first and second floors tie into these embedded pipes in the basement floor? Can you provide a picture of the furnace showing how the embedded pipes are connected?
Old 05-31-20, 06:26 PM
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For what it's worth, I wouldn't freak out about it. It's unlikely that the ducting is releasing any asbestos dust. As long as you aren't making changes to the ductwork, it's not much of a health hazard. Of course, there are issues with under-slab ducting (water infiltration as an example), which may put it on your list to update at some point, but I wouldn't necessarily rush into it just beause of its compsition.
Old 06-28-20, 08:11 PM
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Guys, I have been sidetracked with some stuff. Sorry.

@beelzebob It's all aluminum in the basement, then there is a section under the stone floors that is walled off, I can't see how the pipe in this discussion comes into play.

@zorfdt I was freaking out to be honest! Then I came to the conclusion that this was cement and asbestos mixed, and hopefully the cement content would stop any release.

Then I read your post and felt MUCH better. Thanks.

A quick question - a little piece about the size of a raisin broke off the edge, and I considered taping the edges off. Does that sound ok, to use duct take to somewhat seal off the edges?

Thanks in advance!


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