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Professional Bullshioter
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6,092 Posts
It is the square root of rise squared + roll squared

x 1.414
 

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Professional Bullshioter
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6,092 Posts
It would be 2 ply. Unless the roll bears the NSF stamp then single would be fine. :)
 

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Professional Bullshioter
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6,092 Posts
can't I just hold the pipe up to the fittings?

I am sure I can guess at about how long it needs to be.......
If your running say 3" PVC just carry a tote 66 of 3" nipples you have pre-cut in 1/4" increments. Just keep trying nips until you get the right one:)
 

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Banned
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8,808 Posts
Why not just make a cheat book of all the possible lenghts say up to 20', at 1/8" intervals, then use it like flow charts, look up your center to center and there you will have the length you need.
 

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Professional Bullshioter
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6,092 Posts
After doing it for a few years. The numbers get burned in your head.
 
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