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Old 09-21-2011, 03:06 PM   #1
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regular->type-B vent adapter


both my water heater and radiator boiler, both of which are natural gas, have non-type-B exhaust outlets, i.e. regular single wall. since i am supposed to use type-B, i was wondering if i can just get away with fitting type B onto them (which does fit) or does that present some CO hazard and i should rather use some sort of an adapter that would seal the thing. in the first, more convenient scenario, i was gonna maybe just wrap the joint with some aluminum self-adhesive tape like it's used for regular ducting.

e.g. something like this:

http://www.ventingpipe.com/duravent-...baid=945672437

thanks

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Last edited by amakarevic; 09-21-2011 at 03:15 PM.
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Old 09-21-2011, 05:15 PM   #2
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regular->type-B vent adapter


Type B vent is the double wall vent that your water heater and heater go into, you would use smoke pipe single wall from the appliances to the B vent make sure you observe all clearances.

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Old 09-21-2011, 05:47 PM   #3
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regular->type-B vent adapter


RTV/high temp silicone if need be.
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Old 09-21-2011, 09:01 PM   #4
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regular->type-B vent adapter


The part you're looking for is called a b-vent draft hood connecter. It's a short section of b-vent with the inner wall extended down past the outer wall. May as well make your job look professional.
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Old 09-22-2011, 07:21 AM   #5
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regular->type-B vent adapter


Tip; When you install your single wall pipe to the B vent make sure your joints follow the direction of flow of the flue gas. Just do a neat job with screws no tape required.
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Old 09-22-2011, 02:38 PM   #6
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regular->type-B vent adapter


hey fellas, here is another question i posted, kind of related, i'm sure y'all are familiar with the subject:

Type B vent M/F end vertical positioning

much obliged
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Old 09-22-2011, 06:53 PM   #7
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regular->type-B vent adapter


Just curious about the clearances. My understanding is that it's 16" for single-wall vent and 1" for B-vent, is that right?
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Old 09-22-2011, 09:54 PM   #8
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regular->type-B vent adapter


Quote:
Originally Posted by garya505 View Post
Just curious about the clearances. My understanding is that it's 16" for single-wall vent and 1" for B-vent, is that right?

C-vent (Single wall) is 6", B-vent (double wall) is 1".
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Old 09-22-2011, 11:37 PM   #9
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regular->type-B vent adapter


Quote:
Originally Posted by hvac benny View Post
C-vent (Single wall) is 6", B-vent (double wall) is 1".
Well, I was only off by '1'.
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Old 09-22-2011, 11:40 PM   #10
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regular->type-B vent adapter


is there such a thing as A-vent?

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