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If one sprinkler goes off, don't they all go off?
No. Only the sprinkler over the fire will activate. When the heat of a fire raises the sprinkler to its operating temperature, usually between 135°F to 175° F, the fusible link or frangible glass bulb will break, dislodging a plug and opening the orifice so that water can spray out.

Home Fire Sprinkler Systems

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1. What are fire sprinklers and how do they work?
2. Can the fire sprinklers go off by accident?
3. If one sprinkler goes off, don't they all go off?
4. Why do I need fire sprinklers if I have a smoke detector?
5. Do Fire Sprinklers help with my insurance?

Fontana City Hall
8353 Sierra Ave.
Fontana, CA 92335
Ph: (909) 350-7600
M-Th, 8am - 6pm