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Service Collars

These verification of service collars (also known as "maintenance and recharge service collars" under recent NFPA changes) meet the NFPA 10 standard for portable fire extinguishers. They are used to indicate the date of the last disassembly of the extinguisher (for servicing, hydrostatic testing or other maintenance) and can only be installed with the valve assembly removed.

Yeah, there's only one entry in this subheading, but we didn't want to jam them into another category where you might overlook them.