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what is the inside diameter of "A"? I have a 6" diameter galvalume double wall pipe that I need a trim collar to fit around.
Posted by Elite Deals - Chris M. on 24 October 2013 03:28 PM

Our Answer:

The inside diameter, or dimension "A", is 9 1/8". This component is designed to trim the outside of a round ceiling support and is larger than the vent pipe itself. There is not a specific trim collar for the double wall pipe, as it cannot get close enough to combustible material to utilize a collar.

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