First off, I take no credit for this equation except to say I got (copied) it from Mr. Denton B
He has written about it more than once SINCE 2010 when I joined the 'fire. Hopefully he will chime in to define it's dependability. I've read it from him, but don't remember exactly.
It goes like this:
C U P X 1.516..-17902= PSI
my example only...50000 CUP X 1.516 = 75800
75800 -17902 = 57898 PSI -------------------------------------- 50000 is roughly 86.3 % of 57900 NOTE - I take NO credit just THANKS to Mr Denton.
