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A fire hydrant valve is the control mechanism attached to a fire hydrant that regulates the flow of water from the municipal supply into firefighting hoses.
Typically located at the hydrant's outlets, these valves are operated with a special wrench that turns a pentagonal or square stem. When opened, the valve lifts a internal gate or compression mechanism, allowing high-pressure water to flow into the attached hose lines. When closed, it provides a drip-tight seal to prevent leaks.
Constructed from durable, corrosion-resistant materials like brass or ductile iron, fire hydrant valves are designed for reliability and long-term outdoor exposure. They are critical components that enable firefighters to quickly access and control the water supply essential for extinguishing fires and protecting lives and property.