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NFPA 25 13.2.5.1

Question asked by mmerriex on Jul 26, 2018
Latest reply on Jul 27, 2018 by cdafd

 I have read NFPA 25-11 13.2.5.1, and when it states the "sole water supply is through a backflow preventer and/or pressure reducing valves" require quarterly testing. What exactly is "sole water supply"? Is this the main water supply to the building, or some cases suppression systems are fed off of a municipal water line. I know this is too simple, but want to make sure my assumptions are correct. thanks. 

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