To provide a hot water heat source water heater and a hot water supply pipe for supplying the heat source hot water to the hot water heat source water heater, capable of improving energy using efficiency and saving energy.
This hot water heat source water heater 4 has a heat exchanging means having a bottomed double cylindrical structure, and the heat source hot water heat transfer pipe 42 in which the heat source hot water taken from a separate pipe 2a flows, is mounted between an inner cylinder 40 and an outer cylinder 41 in a state of being spirally wound along an outer periphery of the inner cylinder 40. The separate pipe 2a is connected with the heat source hot water heat transfer pipe 42 at a vertical upper end portion and a vertical lower end portion, and the heat source hot water flows from the vertical lower portion to the heat source hot water heat transfer pipe 42, and flows out from the vertical upper portion. Further connecting portions of the vertical upper end portion and the vertical lower end portion respectively have headers 20, 21, and a flow channel of the heat source hot water is branched into a plurality of flow channels and connected with the headers from the direction of a side part of the outer cylinder 41.
ABIKO TETSUO
HORI NORIHIRO
FUJIOKA KEIKO
TOMIE TORU
WAKE FUMIO
SUMITOMO PRECISION PROD CO
NORITZ CORP
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