On Jan 23, 3:54*pm, wrote:
When we lit the stove at xmas smoke came out of the back. Filled the
house with smoke. Checking it today for the first time, there are 2
outlets for the 6-inch pipe that go to the chimmney. The unused one
one the back has a crack and fell off when I touched it. How do I
reattach it. There are no screws or anything. Just an insulation ring.

Obviously there for the option of top vent or rear vent. Remove stove,
take to garage, get plate fabricated, weld in place and forgetaboutit.