Reliable G4 low profile cover plate is for use with a variety of Reliable concealed sprinkler models as shown below. The cover plate is attached to the skirt using ordinary temperature classification solder. When the ceiling temperature rises this solder will melt and the cover plate will drop away to expose the sprinkler head to the rising ambient temperature. The cover plate has a temperature rating of 57C/135F and is available with a chrome or white decorative finish (other colours and finishes available on application).