You can cut the pipe on the bottom end with a hack saw or a metal band saw. The upper end of the pipe has the crimp on it so it slips into the next. Ours is 6".
Thanks DDFFWIW, the Four Dog Stoves are a favorite of some folks.
Somewhere around here I have a great book about stove building that was written backk during the '70's back-to-the-land craze.....lots of good ideas...I'll see if I can find it.
got any pics?I cut down a 100 lb propane tank made it about 20'
sorry about that I'm a bit braindeadLook at post 19 thats mine if you need more pics i can take some