Does the list of sprinklers pertain to all installed sprinklers system before 2017 or just to systems installed during and after 2017?
I would say any system new or old, because you are inspecting to NFPA 25 and if you use the 2017, than that is what you should go by.
I guess you can argue that the spare head box met NFPA 13 when installed, as long as was installed using the 2004 edition or before, so you would have to research that.
First time I heard about it, but I am not on the inspection side, in a way.
I looked at 2007 NFPA 13 and the requirement is there, put not in 2004 edition.
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