Downcomer System for Fire Fighting comprises a high level water storage tank discharging into 150 mm diameter riser pipe with landing valves at each floor and to which canvas hose with nozzles can be connected to direct the water jet at the fire. The Downcomer System has no pumps and therefore the system pressure is limited to the static pressure only. The Downcomer System can be availed in various specifications. The Downcomer System for Fire Fighting is capable of providing efficient performance.