Our Answer:

It is indeed most common to use a cast iron boot to achieve the installation you are working on, but as you mention, vertical height will prevent the use of a boot. I am not aware of an adapter that is currently manufactured that would be short enough for your needs. It will most likely be necessary to have a fabricator manufacture a boot out of 304 or 316 stainless steel that can work for you.

In Response to Question:

I'm replacing a damaged wood stove insert with an older model that I just purchased. I need a part similar to this which will connect up to to an 8" flexible steel liner. The outlet on the stove is rectangular. Dimensions on the stove are 4 5/8" X 16". Does a part like this exist? I've considered boots that screw to the top of the insert, but head-room of just 3" is an issue. The insert (photo 1) needs to connect up (photos 2 and 3).

From Page: CPF-21475

Manufacturer's Product Number: 21475

Our SKU: 21475

Page ID: cpf-21475