Dear sirs, Thanks for your effort. for question 1 i found the solution for my problem. but the second question the curve between time and pressure and the calibration between 1-4 a.m only but the remain curve is not ?why? is that for the calibration o leakage at minimum night flow only Or what? there is another question. the equation of Orifice(sprinkler equation) is empirical equation Or not? Thanks Eman
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