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04-15-2007, 08:15 AM
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Join Date: Mar 2007
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Draft hoods , combustible material
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Last edited by Jeff Eastman : 12-19-2007 at 02:29 PM.
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04-15-2007, 08:48 AM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 6,629
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Re: Draft hoods , combustible material
Originally Posted by Jeff Eastman
Would you consider PVC (used for water supply) combustible material?
PVC is not allowed for use as water supply/water distribution piping.
See the other tread and the code references given there. |
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04-15-2007, 09:53 AM
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Join Date: Mar 2007
Location: Philadelphia PA
Posts: 1,200
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Re: Draft hoods , combustible material
If it's cpvc, I believe it should be at least 18 inches from the hot/cold connections at the WH.
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04-15-2007, 12:03 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
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Re: Draft hoods , combustible material
Originally Posted by Jeff Eastman
Draft hoods need 6 inches clearance from combustible material correct?
I believe so, yes. |
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04-15-2007, 08:58 PM
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Join Date: Mar 2007
Location: Pa.
Posts: 541
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Re: Draft hoods , combustible material
It is 6 inches, just like single walled vent connector. Even if B-vent is sitting on top of the draft hood, the clearance is from the hood itself. I find melted pipe insulation all the time.
Jeff, the definition for non-combustible is ASTM E-136 or essentially Superman's cape. Do you think PVC can withstand a 1,382F vertical tube furnace without bursting into flames, crumbling apart or losing 50% weight? FYI, even Wonderboard cannot pass this test.
__________________
Keep the fire inside the fireplace!
IAFCI Regional Director & Certified Fireplace Inspector
Certified Master Hearth Professional & HPBA BoD
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04-15-2007, 09:09 PM
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Join Date: Mar 2007
Location: New Port Richey, Fl
Posts: 446
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Re: Draft hoods , combustible material
So that's why your not supposed to "pull on Superman's Cape..."
So the song goes  |
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04-15-2007, 09:12 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
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Re: Draft hoods , combustible material
Originally Posted by Bob Harper
non-combustible is ASTM E-136 or essentially Superman's cape. Do you think PVC can withstand a 1,382F vertical tube furnace without bursting into flames, crumbling apart or losing 50% weight?
1,382 degrees F, guess that is 750 degrees C?
I like your "Superman's cape" explanation of that test. I may steal it for use now and then. |
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