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Mar 09, 2004 · A friction loss chart and a pump gpm/psi rating chart is used to determine maximums. At 150 psi a 1000 gpm will move 1000 gpm. At 200 psi 700 gpm and 250 psi 500 gpm. With 40 psi for nozzle pressure that leaves 210, 160 or 110 psi respectively for friction loss. ................
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