I looked at the black stove pipe on the inside of the house before it goes thru the wall this past weekend, and it looked a bit odd. Upon close inspection, it had separated and there was actually a gap between the sections! The installer screwed all pices together except for this one, and guess what... I also checked the legs which have a leveling screw in them and 1 leg wasn't even touching the ground. Also, the bolts attaching the leg to the stove bottom was a bit loose on all four.
So, be sure to check your stove and pipe periodically, especially after install.
So, be sure to check your stove and pipe periodically, especially after install.