NFPA 13: A Horizontal Pipe Supplies Log Valves

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You asked the following question: “A horizontal pipe supplies hose valves that rises vertically 5 ft through a concrete podium deck and terminates with hose valves. A 4-way brace is provided on the horizontal pipe at the elbow fitting and a flexible coupling connects to the vertical pipe. The vertical pipe penetrates the concrete where a link seal is provided. Is it the intent of NFPA 13 to require a flexible coupling above and below a concrete podium deck when installing a vertical standpipe hose valve connection?” In response to your question we have reviewed NFPA 13, 2013 edition as the applicable standard. Our informal interpretation is that a flexible coupling would not be required for this application. Since the 5 ft vertical pipe
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