Description
The Kidde-Fenwal WK-251821-000 is a 3/4-inch flexible discharge hose used in Kidde High Pressure Carbon Dioxide (HPCO₂) fire suppression systems. It connects the discharge head of a CO₂ cylinder assembly to the system manifold, allowing the cylinder to discharge into the distribution piping network.
The hose incorporates a swivel connection at the discharge head and a flexible reinforced construction that helps compensate for alignment variations when multiple cylinders are connected to a common manifold. The assembly includes steel fittings with trivalent chromate finish and a reinforced rubber hose body with wire braid.
Each HPCO₂ cylinder assembly requires its own discharge hose. NFPA 12 requires the hose to be either replaced or hydrostatically tested every five years from the original manufacturing date marked on the hose fitting.


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