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NFPA 22 dual refill lines

Question asked by federicod on Nov 4, 2019
Latest reply on Nov 8, 2019 by soundararajan.kunjithapatham

Could someone please help clarify what exactly is meant by "dual refill lines" in the following section of the NFPA 22:

 

14.5 Break Tanks....

14.5.3 Refill Mechanism. The refill mechanism shall be listed and arranged for automatic operation.

14.5.3.1.1 Dual automatic refill lines, each capable of refilling the tank at a minimum rate of 150 percent of the fire pump(s) capacity, shall be installed.

 

Would that imply that two separate water services are required, or just two separate automatic refill mechanisms which could theoretically be connected to the same header?

 

Thank's in advance.

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