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2010 NFPA 20 table 4.26 Has an asterisk on the inlet pipe stating “†Applies only to that portion of suction pipe specified in 4.14.3.4”., 4.14.3.4 states “The size of that portion of the suction pipe located within 10 pipe diameters upstream of the pump s

Question asked by Andy Schwartz on Nov 22, 2016
Latest reply on Nov 22, 2016 by Ivan Humberson

Please clarify NFPA 20 table 4.26, we believe this applies to the first 10 diameters of pump suction at 100% of pump capacity. We have a contractor attempting to apply this to 150% of pump capacity and the entire suction pipe to the street or approx. 50 ft.

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