just finished making stove and only had a 3"pipe so that will have to do till a can source either a 4 or 5" pipe, is there an ideal length for the pipe or just what looks ok?, and which is better diameter to usse 4 or 5"
thanks in advance
Anything between 4" to 6" should be absolutely fine. Height wise, make sure it clears everything with a couple of feet plus to spare, and that should be plenty, (unless your workshop is only four or so feet high? ).