Frost-proof outlet fitting, comprising a structural unit which can be inserted by a front end into a pipe passing through an outer wall, having a) a shut-off mechanism arranged in the region of the front end, comprising a valve seat and a valve disc interacting therewith; b) a fitting housing which is arranged at a rear end of the structural unit longitudinally opposite the front end and has an emptying opening (11d, 13) and operating element; c) a conduit pipe which is in liquid-conducting connection with the shut-off mechanism and the emptying opening (11d, 13); d) a spindle for moving the valve disc, wherein the spindle extends in the conduit pipe and couples the operating element to the shut-off mechanism; and e) sealing elements (63, 64) for sealing the structural unit with respect to the pipe passing through the outer wall; wherein f) with the structural unit inserted, the front end of the conduit pipe opens by way of the shut-off mechanism into the pipe passing through the outer wall, and wherein a length of the conduit pipe and of the spindle is chosen such that, with the structural unit inserted, the shut-off mechanism comes to lie in a frost-proof region of the outer wall or in a frost-proof region on the inner side of the outer wall, g) the sealing elements (63, 64) of the structural unit take the form of shaped seals arranged on the casing side with respect to the conduit pipe, characterized in that h) the fitting housing comprises an outer housing which is designed to be substantially tubular, wherein the outer housing has at its front end a widened pipe cross section with an internal thread which can be screwed with a corresponding external thread of the pipe passing through the outer wall. a) a shut-off mechanism arranged in the region of the front end, comprising a valve seat and a valve disc interacting therewith; b) a fitting housing which is arranged at a rear end of the structural unit longitudinally opposite the front end and has an emptying opening (11d, 13) and operating element; c) a conduit pipe which is in liquid-conducting connection with the shut-off mechanism and the emptying opening (11d, 13); d) a spindle for moving the valve disc, wherein the spindle extends in the conduit pipe and couples the operating element to the shut-off mechanism; and e) sealing elements (63, 64) for sealing the structural unit with respect to the pipe passing through the outer wall; wherein f) with the structural unit inserted, the front end of the conduit pipe opens by way of the shut-off mechanism into the pipe passing through the outer wall, and wherein a length of the conduit pipe and of the spindle is chosen such that, with the structural unit inserted, the shut-off mechanism comes to lie in a frost-proof region of the outer wall or in a frost-proof region on the inner side of the outer wall, g) the sealing elements (63, 64) of the structural unit take the form of shaped seals arranged on the casing side with respect to the conduit pipe, h) the fitting housing comprises an outer housing which is designed to be substantially tubular, wherein the outer housing has at its front end a widened pipe cross section with an internal thread which can be screwed with a corresponding external thread of the pipe passing through the outer wall.