NFPA 291:"the best results are obtained with the pitot pressure (velocity head) maintained between 5 psi and 10 psi"
The chart covers 2 PSI through 7(and over)with a coefficient ranging from 0.97 down to 0.83. I was questioning whether the higher 32 psi would require a lower coefficient than...
NFPA 291 does not list any modifications for higher pressures.
Does anybody know where these would be listed or a formula to figure the proper modification to use?
I only have one down stream hydrant and opening 2-2-1/2" outlets did not drop the residual enough and did not flow my required...
