Hi Forum , Could someone shed some light on the requirements for 4.7.7.2 . I have a project where the quoted fire pump comes with a Pressure relief valve and waste cone .
City pressure is 58/56/1586 , we are using a 1500gpm pump at 140 psi to get the flow and pressure we need to supply a freezer using LP-46 heads . I find many references to the use of Pressure relief valves being Used but 4.7.7.2 is causing me to scratch my head . Colin
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