Description
The Reliable Model G4-300 Concealer™ uses the proven Model G fusible element in a standard style sprinkler frame with a drop down deflector. This assembly is recessed into the ceiling and concealed by a flat cover plate. The cover plate and sprinkler cup assemblies are attached using a strong threaded engagement. This threaded engagement provides ½” (13mm) of cover adjustment. The cover plate is attached to the skirt using an ordinary temperature classification solder. This result in strong cover plate assembly with an ordinary temperature rating, and an intermediate temperature sprinkler which can be installed in 150°F (66°C) environments. When the temperature at the ceiling rises, the solder holding the cover plate fuses, allowing the release of this part and thus exposing the sprinkler inside to the rising ambient temperature.