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Yes I did do 10 5/8 and 10 3/4 as well and It was very close. within an 1/8" when I did 10 3/4. However doesnt the depth of the threads have anything to do with where the 90's will end up?

Ok thanks. So since its a 1/2 90 on either end I would deduct 1/2" + 1/2". Wanting the centre to centre to be 12 the cut of the pipe would be 11". Ill give it a shot tomorrow and let you guys now how I do. Thanks so much

Ya but the number of threads comes into play as well though...

Would this rule give me a 3-4 hand turn and 3-4 wrench turn ?

So for say a 2" pipe it would be 2" a side? How come with the math of my fittings book it came out to 10 5/8 with there measurement of thread engagement? obviously it doesn't work because I did it this way but seems weird that there measurements aren't working out. Also is there a trick to...

No, sorry. I am actually building something and need to use black iron. Its a first year plumbing/pipe fitting So to clarify. I need to have a 1/2" black iron pipe that is 12" center to center. I need to thread the pipe myself and have two 90's of both ends. I am having trouble getting the...

Hey everyone. I am doing a project in plumbing school and was having troubles. I need to thread and build a design using 1/2 " threaded black iron pipe. For example I have a piece of 1/2" threaded pipe. I need to thread on a 1/2" 90 on both ends and at a length of 12" to both centres...