The present invention relates to a floating water main. ; The present invention is, In the constant in the constant inflow pipe (1) in a floating state to discharge water to the water supply main (2), the inlet 12 and the outlet 13, the flow path connection (14) connected to said constant tube 1 is provided, the valve member to regulate the flow of a constant (10); Is provided between the outlet of the valve member 10, 13 and the water supply main (2), a reservoir for storing the residual water remaining in the water supply main (2) 20; Injection nozzle 32 for injecting and installed on the outlet 13 of the valve member 10 by the constant opening of the valve member 10 to the main water supply (2), the jet nozzle 32 and the water supply main ( 2) is connected to the injection nozzle 32 through the exhaust hole in the open leads reservoir 20 so that the residual number of discharged water supply main (2) stored in the reservoir 20 by the partial vacuum formed by spraying (34a) is consisting of a tube having a honing 34, the ejector (30). The configuration, including the ; Thus, the present invention is caused to freeze in winter to store the number of residues that remain in the water as the main reservoir to have the benefit of being able to be prevented.
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