More particularly, the present invention relates to an auto drip valve that is installed in a fire pipe and discharges residual water inside an inner pipe. More specifically, the auto drip valve includes an upper body portion 11 coupled to a lower portion of a pipe, A body 10 integrally formed with a lower body portion 15 forming a jet port 17 in a radial direction; Piece coupling structure of a disk 20 installed vertically to the step groove 16 of the body to open and close the jet port 17 while compressing the spring 25 according to the pressure inside the pipe and to discharge residual water inside the pipe So that the parts structure and the number of parts are simpler and lighter than those of the prior art. Therefore, it is possible to provide not only an improvement in assembling workability but also a cost reduction and a quality improvement effect.
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