I was wondering if anybody can supply me with detailed instructions on how to fabricate a four piece fitting that fits over a 90 degree elbow. I do not want to use a 45 degree angle. I believe this four piece elbow is cut at either a 30 or 33 degree angles. However I would like somebody to direct me to a site or point me in the direction of how exactly you cut these pieces. I am insulating 7/8 copper pipe with 3/4 inch armaflex. The armacell/armaflex link from there website does not go into detail on how to do this. attached is some info I have found, but not exactly what I need. If anybody can help I would greatly appreciate it.
This site shows what Im trying to fabricate but they do not go into detail on exactly how to measure for these cuts.