Underground Fire Hydrant Pit. A firefighter connects a fire hose to the hydrant and releases a valve to get water from the water main. Pillar fire hydrant is connected to the water main for allowing firefighters to quickly access a local water supply.

Fire hydrants must be operated properly, so adequate fire protection can consistently be provided. These categories are further divided. Hydrants that are designed with the entire operating unit placed underground and covered with a lid at ground level are called flush.

The different valves on a fire hydrant allow it to be attached.

A firefighter connects a fire hose to the hydrant and releases a valve to get water from the water main. Fire hydrant's are made of cast iron and are primarily meant as a water source for fighting fires, but are also used for public water access. Alibaba.com offers 769 underground fire hydrant products. Landing & underground fire hydrant.