I'm having some issues finding a good way to connect my stove pipe to my chimney. I have a 8" to 6" reducer coming right out of the ceiling box (first photo), and what I need help finding is an adapter that will go from Duravent's 6" double wall stove pipe, to a 6" single wall stove pipe. They seem to have an adpater for their 6" dvl pipe to the stove (second photo), but would that work for connecting to the chimney? Can it be put upside down?