How to Find a Fire Sprinkler SIN (Sprinkler Identification Number)

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Learn where this vital code ‘lives’ and what the SIN tells you

Every fire sprinkler manufactured after December 31, 2000, has a sprinkler identification number (SIN) on its deflector following rules issued by the National Fire Protection Association (NFPA). It’s a four-to-seven-digit code that starts with one or two letters revealing the head’s manufacturer:

·        R: Reliable

·        SS: Senju

·        TY: Tyco

·        V: Victaulic

·        VK: Viking

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