An apparatus for supplying drinking water has a construction such that a first branch pipe (P2) and a second branch pipe (P3) are connected to a water supply pipe (P1) in which tap water flows, a cold water generating tank (3) is provided in the first branch pipe (P2), and the second branch pipe (P3) is provided with an ion exchange device (4) and a hot water generating tank (5). When the tap water is allowed to flow in the first branch pipe (P2), cold water is generated in the cold water generating tank (3). Also, when the tap water is allowed to flow in the second branch pipe (P3), the tap water is softened by the ion exchange device (4), and is further heated in the hot water generating tank (5). Therefore, not only cold water can be supplied but also hot water from which mineral components are removed can be supplied.

 
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