What manufacturer is the pipe from? I would be very interested if there is a company making double wall connector pipe that can be cut to length.I was told by the company selling the telescoping pipe that it could be cut to length if a little too long, and that the male end could be crimped a little more if necessary. We also discussed the heavier-duty 3-blade hand crimping tool that they recommend and sell to do that.
This is the only crimping I've needed to do besides a slight crimp for one of the rain cap ends. I was not aware that it was a regulatory issue to crimp the end of a stove pipe about 1/8 inch. The company that sells the pipe also makes custom lengths, and can custom-crimp them, but it would have been a lot more expensive. The machine crimp I got looks beautiful and fits the BK collar perfectly.
Fortunately I haven't needed to cut any pieces of stove pipe shorter than they were when I received them. It must be legal to drill holes to attach stove pipe, liner and fittings where holes are not pre-drilled, but now I 'm thinking there may be strict rules about how many holes (I've been doing four holes evenly spaced around) and at what positions. There are so many details involved in making a stove installation legal! I'm very careful about what screws to use (only the exact size specified in the BK manual) to attach to the BK stove collars. However the installer used screws of a much longer length than BK specified for attaching the insert, so I took them out and replaced them with screws of the BK manual's specified length. And all the screws and rivets I've used are stainless in case that's a requirement.
Thanks for your good information. Thanks for being very thorough and forthright!