Above-ground fire hydrant is a water supply facility set on the fire hose network outside the building, mainly for the fire truck to get water to put out the fire, but also directly connected with the water hose, water gun to put out the fire, is one of the important fire fighting facilities. On the basis of common fire hydrant, the above-ground fire hydrant is improved on the key parts to realize the characteristics of quick opening, pressure regulation, anti-freezing, anti-collision, etc., which makes it more practical and realizes positive pressure sealing in the structure and has automatic water relief valve.
