Stand Post Hydrant
It is a component of active fire
protection to which a fire hose can be attached. Large quantity of
water require for quenching major fires in the affected area, easy
accessibility in the shortest possible time is of paramount importance in
controlling and putting out these fires. Fire hydrant System is designed to
serve these requirements.
There are two types of pressurized fire hydrants: wet-barrel and
dry-barrel. In a wet-barrel design, the hydrant is connected directly to the
pressurized water source. The upper section, or barrel, of the hydrant is
always filled with water, and each outlet has its own valve with a stem that
sticks out the side of the barrel. In a dry-barrel design, the hydrant is
separated from the pressurized water source by a main valve in the lower
section of the hydrant below ground. The upper section remains dry until the
main valve is opened by means of a long stem that extends up through the top,
or bonnet, of the hydrant.