56.4202—Fire hydrants.
If fire hydrants are part of the mine's firefighting system, the hydrants shall be provided with—
(a)
Uniform fittings or readily available adapters for onsite firefighting equipment;
(b)
Readily available wrenches or keys to open the valves; and
(c)
Readily available adapters capable of connecting hydrant fittings to the hose equipment of any firefighting organization relied upon by the mine.