Operational Diagram of Fire Hydrant and Water supply system Underground reservoir (60 m 3) Fire reserve Domestic reserve WASA connection Start Fire pump Open fire hydrant valve Switch on fire alarm Water point Fire incident Extinguishing fire with firehose Fire hydrant Water point Water point Water point 100 ft radius coverage area for each hydrant Water point Water point Fire hydrant Fire hydrant 5 4 3 2 1 Fire hydrant