Consistent moisture exposure accelerates corrosion on shells, valves, and mounting hardware, and can affect seal integrity faster than in a drier inland climate.
This is a gradual process, not something that shows up overnight, but it’s part of why an annual inspection catches issues in this climate that might not appear as quickly somewhere with lower ambient humidity.
Units mounted near garages, outdoor storage, docks, or anywhere with regular air exchange with the outdoors see more of this exposure than one sitting in a climate-controlled office.
Fort Myers Shores’ riverside properties and the retail and residential mix in San Carlos Park both have plenty of extinguishers in exactly these kinds of semi-exposed locations, which is worth keeping in mind when a unit is mounted rather than just picking whatever spot is convenient.
Visible surface corrosion, a sticky or hard-to-read gauge, and any rust around the valve or mounting bracket are all worth flagging rather than waiting for the next scheduled inspection.
None of these mean the unit needs to be replaced outright, but they’re worth a look sooner rather than later if the extinguisher sits somewhere with regular outdoor air exposure.
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