Reliable ® TNL280 Pendent Nozzle K-factor K400 lpm/bar 1/2 (28.0 gpm/psi 1/2 ) Pipe Threads 25 mm (1”), ISO 7-1R1 (BSPT) or NPT Maximum Coverage Area 5.5 m x 5.5 m/30.25 m 2 (18 ft x 18 ft/324 ft 2 ) Working Pressure Range 0.5 to 1.2 bar (7 to 175 psi) Certification cULus (2351) Nozzle Design Overhead pendent design for use in vehicle road tunnel M4 East Tunnel Entrance Photo provided courtesy of Transurban CASE STUDY: Project Description About the ‘New M4’ Tunnels The ‘New M4’ East (M4E) tunnel project is located in the inner west of Sydney, Australia. The M4E tunnel is a twin tube design of 3 lanes in both directions. Each tube is 5.5 km (3.4 miles) in length. Therefore, the project has approximately 11 km (6.8 miles) of tunnels in total. The tunnels are divided into 517 fire

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