I have a system where I'm using couplings to connect the 40 mm. branchlines (steel pipe). NFPA 13 says that I maximum can have 15 inches between the hangers (table 9.2.2.1). And that I need a minimum of at least one hanger of each section of pipe. But I can't find anything about a maximum distance from a coupling to a hanger. My question is now; are there any requirements for that in NFPA 13?
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Maximum distance between a hanger and a coupling?
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