It is generally believed that as long as the fire truck arrives at the fire site, it can immediately go out of the water to put out the fire. In fact, quite a few of the fire trucks equipped by the fire brigade do not carry water, such as elevating fire trucks, emergency rescue vehicles, fire lighting vehicles, etc. They must be used together with fire fighting vehicles. However, some fire fighting vehicles are also in urgent need of finding water when fighting fire because of their limited carrying capacity. At this time, the fire hydrant will play a huge role in water supply.

The ground fire hydrant is an outdoor ground fire water supply facility. It is used to supply water to the fire truck or directly connect with the water hose and water gun to extinguish the fire. It is a special facility for outdoor fire water supply. Its upper part is exposed to the ground, with obvious signs and convenient use. It is composed of valve body, elbow, valve seat, valve disc, drain valve, valve rod and interface. The ground fire hydrant is a necessary fire-fighting equipment in the city, especially in urban areas and areas with few rivers, to ensure the fire water supply. All factories and mines, warehouses, docks, freight yards, high-rise buildings, public places and other densely populated areas should be installed if conditions permit.