90% furnace: venting material question

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  #1  
Old 02-09-19, 04:03 PM
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90% furnace: venting material question

I'm wondering if anyone sees an issue utilizing a rubber plumbquik elbow in a 90% furnace vent pipe? I've attached a picture.

Specs say that this supports temp up to 140 degrees.

 
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Old 02-09-19, 04:07 PM
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No way I would put that in my furnace.
 
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Old 02-09-19, 04:30 PM
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I wasn't talking about inside the furnace. I meant on the exhaust pipe from the furnace.
What would be the concern? Heat?
 
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Old 02-09-19, 04:37 PM
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The label says it's flexible polyvinyl chloride.
 
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Old 02-09-19, 05:03 PM
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Why not just use a PVC elbow?
 
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Old 02-09-19, 05:04 PM
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Glue style PVC fittings only.
 
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Old 02-09-19, 05:07 PM
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This will be on the direct connection to the outside of the furnace and I would like to be able to remove it (if needed) without replacing vent pipe due to it being "glued"

If this is good enough for water and can support the temp, I'm wondering why it's an issue.
 

Last edited by geewiss; 02-09-19 at 05:08 PM. Reason: additional comments
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Old 02-09-19, 05:56 PM
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Curious why you think you may have to take it apart?
 
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Old 02-09-19, 06:01 PM
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Well I'm in a situation now where I need to take it apart because a technician didn't seal it properly and it's leaking water. So I had to order the gray PVC piping in the furnace to replace it since it's all glued. I'm waiting for those parts to arrive.

I figured why not just use this elbow with the clamps on it just in case I need to remove it again for whatever reason.

I don't quite understand how it's really any different than the rubber elbow that connects the inducer to the PVC exhaust in the attached picture.
 
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Old 02-09-19, 06:25 PM
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All the parts inside the furnace were designed and approved to be used with that furnace.
That piece has not been approved to be used in a furnace vent system.... period.
There really is no discussion involved. If you want to use it..... go right ahead.
 
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Old 02-09-19, 06:33 PM
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Understood. I've scoured the net looking for an approved material list for furnace vent and just can't seem to find it. Any pointers on where I can find such information.

Again, thanks for all the help!
 
  #12  
Old 02-09-19, 08:14 PM
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Rubber 90s

I believe that is the same product used to connect the draft inducer to the 2Ē vent pipe, but my concern would be if itís going to be structurally sound. Hence a pvc 90 is a better choice. Iíve been at this 30 years and would not assume itís ok without consulting factory. Thereís just too much riding on your venting system being sound.
 
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