Concealed Sprinkler

   Concealed fire sprinklers are somewhat like pendent fire sprinklers; however, they’re located within the ceiling and they’re hidden by a cover plate.   

Once the cover plate is installed, you can’t see the concealed fire sprinkler at all. The cover plate will fall off at a temperature about 20 degrees lower than the fire sprinkler, allowing the deflector of the concealed sprinkler to drop and be exposed to the heat from the fire.