Title: TFP510_06_2015.pdf
insufficient engagement of the Inlet pipe threads with consequent leakage Drainage In accordance with the minimum requirements of the National Fire Pro- tection Association for dry pipe sprin- kler systems, branch, cross, and feed-main piping connected to Dry Sprinklers and subject to freezing tem- peratures must be pitched for proper drainage.Exposure Length When using Dry Sprinklers in wet pipe sprinkler systems to protect areas subject to freezing temperatures, useTFP510 Page 6 of 10FACE OF SPRINKLER FITTINGHEATED AREADSB-2 INTENDED FOR FREEZER STRUCTURESEXPOSURE LENGTH (SEE DESIGN CRITERIA SECTION)FIGURE 11 EXPOSURE LENGTHSTRAP TIES (ENDS ON OPPOSING SIDES OF BOOT)DSB-2 BOOTADHESIVE1-3/4" DIA. (44,5 mm) CLEARANCE HOLEINSULATED FREEZER STRUCTUREDS-1 SHOWN WITH STANDARD ESCUTCHEONFIGURE 14 MODEL DSB-2 SPRINKLER BOOT WITH PENDENT SERIES DS-1 DRY SPRINKLERTO WET SYSTEMSIDE OUTLET PLUGGEDHEATED AREADSB-2 INTENDED FOR FREEZER STRUCTURES