Title: TFP171_11_2015.pdf
Initial and frequent visual inspections of random samples are recommended for corrosion-resistant sprinklers to verify the integrity of the corrosion-resistant material of construction. Thereafter, annual inspections per NFPA 25 should suffice.Inspections of corrosion-resistant sprinklers are recommended at close range, instead of from the floor level per NFPA. Inspection at close range can better determine the exact sprin- kler condition and the long-term integ- rity of the corrosion-resistant material, which can be affected by the corrosive conditions present.TFP171 Page 8 of 105/8±1/4" (15,9±6,4 mm)FACE OF SPRINKLER FITTING2-7/8" DIA. (73,0 mm)2-1/4" DIA. (57,2 mm)3/4" (19,1 mm)1/4" (6,4 mm)MOUNTING PLATE1/8" (3,2 mm)MOUNTING SURFACECLOSURESERIES TY-FRB1-5/16" (33,3 mm)13/16" (20,6 mm)FIGURE 8 SERIES TY-FRB RECESSED PENDENT WITH TWO-PIECE 3/4 INCH TOTAL ADJUSTMENT STYLE 10 RECESSED ESCUTCHEON 2.8 K-FACTOR, 1/2 INCH NPT5/8±1/4" (15,9±6,4 mm)FACE OF SPRINKLER FITTING