Thanks Nick for your reply. I got a C in geometry in high school and I don’t remember much of that stuff. . been a few years ago heh. I’m beginning to think now that my jig on the layout (piece of paper they give me to go by) was missing a figure (measurement) because DUNBAR says that one of the pieces of pipe going from one of the 45’s to the 90 was GIVEN. . well on mine it wasn’t. . I had the overall length, 23 1/4″, and the length from the male adapter to a 45, THAT WAS IT.