(Insert NFPA Copyright legalese here) 5.2.1.1.2 Any sprinkler that shows signs of any of the following shall be replaced: (1) Leakage (2)* Corrosion (3) Physical damage (4) Loss of fluid in the glass bulb heat-responsive element (5)* Loading (6) Painting unless painted by the sprinkler manufacturer A.5.2.1.1.2(2) Corrosion found on the seat, or built up … Continue reading NFPA 25 Commentary and Supplementary Information