【Daily Question】Utilities - Water Supply and Drainage - 20191126

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Indoor fire protection water supply pipes shall meet the following requirements; which one of them is incorrect? (  )    A. In indoor piping systems where fire-fighting water is combined with other types of water, the system should still be able to supply the full amount of fire-fighting water required when the maximum flow rate for the other types of water is reached. B. When the demand for water for production and domestic use reaches its maximum, and the municipal water supply pipes are still capable of meeting the needs for both indoor and outdoor fire-fighting purposes, it is advisable for indoor fire pumps to draw water directly from the municipal pipes. C. The piping networks for indoor fire hydrants and those for automatic sprinkler systems should preferably be separate from each other ； If difficulties arise, it should be installed separately behind the alarm valve. D. In unheated factories and warehouses in extremely cold regions, dry-type systems can be used for indoor fire hydrants. Answer: C