Water being the main extinguishing medium, major fires can be controlled and extinguished by the use of water from firefighting hoses operated by the regular fire services. This firefighting water is usually obtained from hydrants installed on public mains or other premises.
1. External Hydrant System: where the hydrants are installed in the open, like the city or town water mains, or hydrant systems installed in the open areas in industrial or such other occupancies.
2. Internal Hydrant System: installed in buildings or structures to be protected.
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