I bought the wrong wall thimble to replace the original, but it is the wrong type. I want to try to "Jury Rig" a way to use it & am looking for ideas. Here is what I bought:
This link is broken, either the page no longer exists or there is some other issue like a typo.
But I don't have access to the interior side of the block chimney it will be going into. It comes in two parts (to make it's depth adjustable) & I somehow have to get the large flange through the (roughly) 8" hole in the wall. I can always cut down the flange & bend it through the hole & keep hold of it with picture hanger wire so that I can keep tension on the exterior half while I slip the interior half on from inside, & then sheet metal screw the two halves together when I get the right depth. Conversely, I could just use the interior half with a little stove pipe attached to make sure that it exhausts into the center of the exterior chimney.
Is this making any sense to anyone?....Any other ideas on how I could salvage the interior flange so that it will seat against the inside of the chimney?