The present invention includes: main body provided with a water supply member through which water flows into and a connection member connected to a water storage tank; one or more float-feeds which are provided inside the main body and movable upwardly and downwardly depending on a water level of the main body; opening-closing section in which a fluid path, one side of which is connected to a water supply source and the other side of which is connected the water supply member, is formed, and which is provided in the main body to be associated with the one or more float-feeds and opens and closes the fluid path depending on a water level of the water storage tank; and guide section which is provided inside the main body adjacent to the water supply member and guides water to be introduced without influencing upward and downward movements of the float-feed.