What are the three main functions of this combined key?

It is designed to lift the heavy cast iron hydrant cover, operate the main hydrant valve, and operate the lower valve.

What material is typically used for the tubular body of the key?

Mild steel tubes, generally conforming to IS 1239, are used for the main shank or tube.

What is the function of the lifting lip on the key?

The lifting lip acts as a pry bar to securely hook and lift the flush-mounted cover of the underground hydrant chamber.

IS 910

: 1980

Specification for Combined Key For Hydrant, Hydrant Cover And Lower Valve

CurrentSpecializedSpecificationFire Safety · Fire Fighting

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This standard lays down the requirements regarding materials, shape, dimensions, and workmanship of the combined key used for operating underground fire hydrants, opening their covers, and operating the lower valves. Engineers and procurement teams use this specification to ensure standardization, compatibility, and durability of hydrant keys for fire protection networks.

Specification for Combined Key For Hydrant, Hydrant Cover And Lower Valve

Practical Notes

Always verify the compatibility of the square key head with the installed underground hydrant valve spindles on site to ensure there is no slipping during an emergency.

The tool must be properly coated with anti-corrosive paint or galvanized as per the standard to ensure longevity, as it is frequently exposed to water.