I installed my pellet stove the other day and I tested fired it again yesterday when I started smelling smoke. I found the elbow leaking at the seams where it's crimped together and pivots. I could not separate it because I used sealer when I assembled it, so I took everything back to Home Depot and got another through the wall kit. I installed it today. I checked it for leakes and found the elbow and tee both leaking this time. So I removed it and returned it again, now I'll try it a third time. All the leaks are where the pipes are crimped or riveted together. It seems to me the quality and workmanship is very poor.Has anyone else had problems with Simpson Dura-Vent? If you are installing it check very carefully for leaks.