Hi guys, I just joined this morning and was hoping someone could help me out or point me in the right direction. I've been lurking for a few days doing some reading and finally needed to register to ask for some advice. I just recently purchased a slightly used 13-NC to replace a god-knows-how-old Franklin Olympic wood stove. We went to hook up the brand new 6" black pipe that I bought and the pipe does not fit into the collar on the 13-NC. Am i just missing something here or is there a trick/other part needed to fit the pipe in? There is a label on the pipe that indicates the direction of the flow so I believe I'm using the correct end and have it oriented properly. Thanks and please forgive if this information is already posted on here somewhere and I just missed it.