Anyone recognize this type of chimney?

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Mar 4, 2019
1
Quincy, Ca
Anyone recognize this type of chimney?
I need to add 3-4 feet of this type of chimney. Never seen it before. Is 6” ID. Similar but different than duraplus. Pls help
Thanks.
 
Last edited by a moderator:
Measure the outer diameter. I believe that metal fab is 9" diameter for a 6" inner. They claim a 1.5" clearance to combustibles, but the pipe is larger.