Viking Model FSC-25U Unbraided Flexible Sprinkler Connections are complete assemblies intended for installation into commercial suspended ceilings with medium to heavy support tee bars as described in ASTM C635 and C636. The hose assembly includes 25 mm diameter corrugated stainless steel flexible hose. The hose assembly includes an inlet nipple 1” NPT or BSPT for attachment to the sprinkler system branch piping, a special outlet reducer fitting with a 1/2” or 3/4” NPT or BSPT straight outlet. Also included is a support bar and brackets, which secure the complete assembly to a medium or heavy duty commercial suspended ceiling support rail system.