installing thimbles

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harley75

Member
Nov 21, 2016
210
pennsylvania
putting in these thimbles i have to cut through brick now with brick i can just cut the round hole and slide thimble in.I was reading somewhere it had to be a 7.5 inch square
 
putting in these thimbles i have to cut through brick now with brick i can just cut the round hole and slide thimble in.I was reading somewhere it had to be a 7.5 inch square
What type of thimble going through what type of wall for what appliance ect ect?
 
You would need a 12" square for 6" chimney, 14" for 8" pipe. Add a quarter inch for adjustment. Assuming you are using Dura-tech, not Dura-plus.
 
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For simplicity we just cut a square on both sides, install the thimble then pack the dead space in the corners with some of the insulation you removed for the thimble.
 
Is this a brick wall with stud framing behind it or solid brick from interior to exterior? What thimble is being used - class A chimney pipe?
 
What is the thimble construction? Is this the DuraVent thimble for a class a snout extension off of the chimney tee? If yes, is this DuraPlus or DuraTech chimney pipe?
Something like this?
 

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Some more info would have prevented a whole needless conversation. This is pellet vent
 
<> :rolleyes: -> (broken link removed to https://www.duravent.com/docs/product/L550_W.pdf)
 
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