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  1. davidfire

    NFPA 219 flow testing hydrants, 25% drop

    [smile]Hi, Im trying to comply with the 25% drop in residual\static specified in NFPA 219 when carrying out hydrant flow testing. example below Remote static 158 psi hydrant 1 open with residual 154psi and flow 2627 lpm hydrant 2 open with residual 140psi and total flow (x2 hyds)4735 lpm hydrant...

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