Afire hydrant (or colloquially in the US,fire plug) is a source of water provided by most metropolitan communities to enablefirefighters to tap into the municipal water supply to assist in extinguishing a fire.

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  Old style wooden "fire plug" still in use c. 1900
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  1869 Birdsill Holly patent model hydrant, New Orleans, USA
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  Older Birdsill Holly type hydrant at right, then new c 1900 hydrant at left.
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  Late 19th century US hydrant
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  Lexikon der gesamten Technik, 1904

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  Hydrant, Goettingen, Germany
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  Hydrant, Zoo Gelsenkirchen, Germany
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  EinÜberflurhydrant ohne Fallmantel
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  Blauer Überflurhydrant
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  A siamese clappered inlet.
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  Large image of fire hydrant, located in the town of Vienna, Virginia, USA.
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  Danish fire hydrant
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  Alkmaar, Netherlands
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  Poznań,Poland
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  Madison, Wisconsin
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  SeoulKorea
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  Thessaloniki,Greece
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  Geneva,Switzerland
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  Krk,Croatia
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  Jerusalem,Israel
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  Anissaras, Crete
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  inTeterow
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  Caracas,Venezuela
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  Sylt,Germany
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  France
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  France

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  Japan.
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  Germany.
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  Standrohr Unterflurhydrant.
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  A german Unterflurhydrant. This part of the fire hydrant will later be below the ground.
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  A german Unterflurhydrant. This part of the fire hydrant will later be below the ground.
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  France.
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  Spain.
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  Spain.

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  Forbidden City, Beijing

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  Hydrant wrench (Überflur)
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  Hydrant wrench (Unterflur)

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  Netherlands
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  Germany
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  Saint Petersburg, Russia

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  Broadmoor
  New Orleans, Louisiana
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  Ottawa, Ontario, Canada

• Fire hydrants
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• Gallery pages of firefighting