Amazon.com: TUNA UL & CUL Listed 1/2"NPT Fire Sprinkler Head 155°F (68°C) Concealed Pendent Spray K80 Standard Response for Automatic Fire sprinkler System Concealed Head with White Cover Plate : Patio, Lawn
G4XLO QREC Quick-Response Extended Coverage Concealed Pendent | Reliable Sprinkler
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Viking, Quick Response Fire Sprinkler Head, 3/4", Concealed Pendent, Glass Bulb, Brass, 13614 - Century Fire Protection