Reliable MODEL G4 flat cover plate / cap for quick response fire sprinkler model G4 concealed. Need to replace a Reliable G4 cover plate? You've found the right spot! Like all cover plates, when this model G4 cover reaches a specified temperature the solder holding the decorative exterior of the cover plate to its frame melts and the two separate. Recommended cover plate temperature is at a minimum 20¡ãF cooler than the sprinkler head itself ensuring adequate separation time prior to sprinkler activation.
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