Thread: anyone have fire sprinklers *inside* their home?
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      11-12-2021, 07:26 AM   #52
King Rudi
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Originally Posted by 540iSUP View Post
I'm not 100% sure, but isn't there like a piece of wax that has to melt before the sprinkler turns on?
Glycerin-based liquid inside a glass bulb. When heated between 135° - 155° the liquid expands, breaks the glass and the head activates.
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