The underground fire hydrant is an outdoor underground 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. It is installed underground without affecting the city appearance and traffic. It is composed of valve body, elbow, valve seat, valve disc, drain valve, valve rod and interface. The underground fire hydrant is an essential fire extinguishing and water supply device in cities, factories, mines, power stations, warehouses, docks, residences and public places. Especially in urban areas and areas with few rivers, it is more necessary to install. The product has reasonable structure, reliable performance and convenient use. When underground fire hydrants are used, there shall be obvious signs. Underground fire hydrants are common in cold areas.

The outdoor fire hydrant is a water supply facility set on the fire water supply pipe network outside the building. It is mainly used for the fire truck to take water from the municipal water supply network or the outdoor fire water supply network to put out the fire. It can also be directly connected to the water hose and water gun to put out the fire. Therefore, the outdoor fire hydrant system is also one of the important fire-fighting facilities for fire fighting.