Reliable brand Model N25 ESFR Pendent Sprinklers 1" NPT Thread. Please verify application prior to purchase Features Specifications: General guidelines: Sprinkler Position: Pendent, align frame arms with the pipe. Deflectors should be parallel with the ceiling or roof. System Type: Wet Pipe Systems Only Maximum area of coverage: 100 ft2 (9.3m2 ), greater coverage area are allowable in some cases Minimum area of coverage: 64 ft2 (5.8m2 ) Maximum slope ceiling: 2/12 pitch (9.5) Maximum spacing: 12 ft (3.7m) for building heights up to 30 ft (9.1m) and 10 feet (3.1m) for building heights greater than 30 ft (9.1m) Minimum spacing: 8 feet (2.4m) Deflector distance from walls: At least 4 inches (102mm) from walls, and no more than one-half the allowable distance permitted between sprinklers Deflector to Top of Storage: at least 36 in (914mm). Deflector to ceiling Distance: 6 - 18 in (152 - 457mm). Center Line of Thermal Sensing Element To Ceiling Distance: 4 - 17 in (101.6 - 425mm) Sprinkler Type Thread Size: 1" Inch K Factor: US: 25 Metric: 362 Maximum Working Pressure: 175 PSI (12,1 Bar) Finish: Bronze Application and Installation: The Model N25 is an ESFR sprinkler is intended for installation in accordance with NFPA 13 and is a QR Storage Sprinkler for use in all FM Loss Prevention Data Sheets as well as approval of the Authority Having Jurisdiction. The Model N25 ESFR sprinkler is designed for ceiling only sprinkler system with no in-rack sprinklers required. Protection of (but not limited to) most encapsulated or non-encapsulated (including cartoned unexpanded) plastics. Model N25 ESFR is also use for protection of cartoned exposed expanded plastics as well as some storage arrangements of rubber tires, rolled paper, and aerosols.