UNDERGROUND FIRE HYDRANT

PROBLEM TO BE SOLVED: To reduce a size of a valve box, and reduce number of part items and a working manhour by forming an opening serving as a valve element insertion port and a fluid outlet on an upper portion of a valve box, integrating a valve rod supporting part with a part of the opening, and forming a valve rod insertion port. SOLUTION: A fluid inlet 2 is formed on a lower side, while an opening 3 serving as a valve element insertion part and a fluid outlet is formed on an upper side. A projection 4 as a valve rod supporting part is formed on a part of the opening 3 to form a valve rod insertion port 3A. The projection 4 is cast integrally with a valve box 1. A flange 6 of the valve rod 5 is mounted on the projection 4. A male screw 7 is threaded on the valve rod 5 at its lower side of the projection 4. A valve element 9 having a female screw 8 engaged with the male screw is seated on a valve seat 10 in the valve box 1 to block the fluid inlet 2. A hollow cylinder 12 of a cover part 11 is penetrated by a portion of the valve rod 5 upper than the flange 6. A cap 13 is formed on an upper end of the valve rod. A sealing member 14 is arranged around the valve rod 5 inside the hollow cylinder 12. It is thus possible to reduce number of part items and processes, and simplify a structure.