2019 NFPA 13: 16.4.1.1 Where any portion of a system is subject to freezing AND the temperatures cannot be reliably maintained at or above 40 degrees F, the system shall be installed as a dry pipe or preaction system.
I’m sure this has been discussed before, but the above statement requires two conditions: 1. System is subject to freezing 2. The temperatures cannot be reliably maintained at or above 40 degrees F It says AND, so it has to be both, not one or the other, right? So if I have a 38 degree F cooler, is it fair to say that it is not “subject to freezing”, and thus does not require protection? Is it acceptable to drop a wet pendent head into the cooler, rather than use a dry pendent? -Kyle M
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