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Min. rated at net pressure for Centrifugal fire pumps

Question asked by abbas.akhavan on Dec 14, 2017
Latest reply on Jan 18, 2018 by abbas.akhavan

I do appreciate if you could provide me with some background/history of NFPA 20 (Centrifugal fire pumps shall be rated at net pressure of 40 psi or more)? is there any research available from where 40 psi comes from? Thanks.