Originally Posted by KC5TPY
Hello Raymond and welcome. It's called a flue damper. "Store bought" dampers as shown by DaveOmak have about a 1/2" gap all round. This one has given me fits also.. I was a welder fabricator for about 18yrs. and I can't figure out an easy way to design one. If it is at the end of the stack run it's no problem but to put it 6"-10" down inside the stack without splicing the stack has me stumped. I have come up with an elaborate solution of threading a solid bar and nuts and bolts but it all depends on you being able to get your hand down the stack pipe. If someone has a easy method I hope they post it. Sorry I couldn't offer some help. Maybe try to post your question in ALL the smoker builds and OTHER builds forums. I hope someone has an idea and if they do please let me know. Good Luck. Keep Smokin!
The store boughten one that is shown by Dave is the flue damper that I am talking about. I had made a flue damper a few years ago and it was simple to make and worked really well, and it was a fairly tight seal when I closed the damper. There was no 1/2" gap all the the way around, there might have been an 1/8" and it worked well and very easy to make. If I ever find it again I will send you a copy of how to make it. I had it on my other hard drive and it died on me. It was made by a guy that had a handle Rancid Crabtree from Wisconsin, who made himself a smokehouse. That is all that I can remember and I cannot find the posting anymore on the net, and since I had a mini stroke I cannot remember how to do it. I wonder how much smoke and heat I will lose with a store bought one like this 6" flue damper.
Would I be better of waiting and making my own again or using a store bought one, they are $6.99 plus tax? I like to use whatever I can make myself because the funds are scarce here since I have been sick.