I need to know the formula for joining two vertical pipes with a 45 angle pipe. Need formula for length of the 45 pipe.

Thanks for any help!

to join to parallel pipes with one at 45 degrees you can try:

Pitagoras, SuareA=squareb+squarec, thus assuming a is the hypotenuse, the length you need to know, and know the lengyh of B and C.

If you don't know B or C, use the Sin or Cosine depending of which one you know (B or C)

If this is not enough and I can be of further help, send me an sketch to cadu@ fibertel.com.ar

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Originally Posted by ScarlettV

I need to know the formula for joining two vertical pipes with a 45 angle pipe. Need formula for length of the 45 pipe.

Thanks for any help!

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I'm not much on formulas but I can describe how I figure it out.
Say two 3/4" pipes are 8 inches apart and you wish to connect them with two 45 degree fittings.
Take and multiply 8 X 1.41,(actually it's 1.4142) which will give you the length of offset between the secants, (the throat of the fitting) which works out to 11.28 inches. 11 1/4's good. You now have to subtract the distance between the secant and the make up on both fittings. All this means is that you measure the distance between the throat of the fittings and where the offset pipe will seat in the fitting.
In a 3/4" copper 45 this works out to about 1/8" on each 45 making the subtraction 1/4 inch. (The larger the fitting the more you will have to subtract.) Soooo, The 45 degree offset pipe between two pipes that are 8 inches apart will be 11 inches.
I hope I didn't confuse you more with my answer but that's the only way I can describe it. Perhaps one of the other experts can do better.
Cheers, Tom PS. I just read Caicu's answer. All I can say is if my answer confused you his is going to do a real number on yo head!

Quote:

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Originally Posted by ScarlettV

I need to know the formula for joining two vertical pipes with a 45 angle pipe. Need formula for length of the 45 pipe.

Thanks for any help!

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at 45 degree both vertical pipes (sides) are equal in length... ==A x A + A x A = square root of B. for ex the side is 7 ft long then it is 7x7 + 7x7 == 9.8994949; the diagonod side is 9.8994949 ft long

Thank you for your help. Hopefully I can figure one of these out :)

The other two formulas are not pipe fitting formulas. They don't take into consideration the fittings. Not that the don't tell you the distance between two points. That's peachy if you're driving or navigating a boat. But you didn't ask about that did you? You asked a plumbing question and I gave you a plumbing answer. It's simple! Take the measure between the center of the two pipes, multiply by 1.41 and subtract the makeup of the two 45's.
I'm a great believer in. "KISS" (Keep it simple Stupid! ) Cheers, Tom