|How do they work?|
Fire sprinklers are mechanical devices. They are individually heat activated and operate independently off any smoke alarms that may be installed.
When a fire starts, the heat quickly reaches a critical temperature at ceiling level. After 1 or 2 minutes above this critical temperature a fusible link in the head melts, allowing water to flow to the activated head.
When the fire is extinguished, the system is turned off with a simple manual valve.
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