fire hydrant(redirected from Dry fire hydrant)
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a stationary device for obtaining water from an outdoor water-supply system for fire-fighting purposes. There are underground and surface hydrants. Underground hydrants are set in covered wells, and water is obtained by screwing onto the hydrant a shaft with two water outlets for hose connections. One kind of surface hydrant is the column type, which supplies water for fire-fighting and domestic needs; it combines features of a hydrant shaft and a surface hydrant.