Must have been one hell of a pump.
There is no height limit in latest editions of NFPA 14. Standpipes that directly supply hose connections are limited to 350 PSI (stay tuned for 2019 cycle on that one) but there is no height or pressure limit on express mains that serve upper zones. Our firm designed a 545’ single zone system for a tower here in San Diego. The foregoing is my opinion only and is not intended to represent the NFPA 14 Technical Committee, nor serve as an interpretation of the standard. Steve L.
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