Square Peg in Round Hole?

Square Peg In Round Hole?

PostBy: Devil505 On: Sat May 31, 2008 8:35 am

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:
**Broken Link(s) Removed**
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?
Stove/Furnace Make: Harman
Stove/Furnace Model: TLC-2000

Re: Square Peg In Round Hole?

PostBy: billw On: Sat May 31, 2008 9:20 am

I'm not an expert and am not sure about fire codes but your second idea sounds like it's the easiest. Trying to bend the flange back inside a chimney sounds like it would be tough to do. Other than keeping it in place I don't see the need for the flange inside the chimney.
Stove/Furnace Make: EFM 520
Stove/Furnace Model: GOODBYE OIL COMPANY

Re: Square Peg In Round Hole?

PostBy: coaledsweat On: Sat May 31, 2008 9:58 am

That thing is only to insulate your wood/plasterboard wall from the stovepipes heat. It does not attatch to the chimney itself in anyway. You should have a tile thimble in the chimney that the stovepipe goes into. You need to cut a square hole about 2" smaller than that thing at it's widest, then install blocking around the holes interior. The inside flange can then be inserted at a 45* angle through the hole and the unit can then be assembled. Do not use it for attatching stovepipe to the chimney.
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea