HOT WATER STORAGE HOT WATER SYSTEM

To provide a hot water storage hot water system which allows: hot water in a hot water storage tank to be taken out through a hot water tap, and to provide a hot water storage hot water system which can withdraw the hot water in the hot water storage tank to an in-house hot water tap, or can withdraw the hot water to an outdoor withdrawal passage.SOLUTION: A hot water storage hot water system (1) comprises: a hot water storage tank (4) for storing hot water; a heater (3) for heating the hot water in the hot water storage tank (4); and an exterior case (16) for accommodating the hot water storage tank (4) and the heater (3). The hot water storage hot water system is provided with: a drain water passage (43) connected to a bottom part of the hot water storage tank (4), and having a drain water tap (43a) at a downstream-side end part; and a bypass passage (44) branched from a portion on the hot water storage tank (4) side with respect to the drain water tap (43a), of the drain water passage (43), and connected to a portion outside the exterior case (16), of a hot water supply passage (21).SELECTED DRAWING: Figure 1 【課題】貯湯タンク内の湯水を給湯栓へ取り出し可能にした貯湯給湯システムを提供すること、貯湯タンク内の湯水を宅内の給湯栓へ取り出したり、宅外取出し通路へ取り出したりすることのできる貯湯給湯システムを提供すること。【解決手段】湯水を貯留する貯湯タンク(4)と、この貯湯タンク(4)の湯水を加熱する加熱装置(3)と、これら貯湯タンク(4)と加熱装置(3)を収容する外装ケース(16)とを備えた貯湯給湯システム(1)において、貯湯タンク(4)の底部に接続され且つ下流端部に排水栓(43a)を有する排水通路(43)と、この排水通路(43)のうち排水栓(43a)よりも貯湯タンク(4)側の部位から分岐して給湯通路(21)のうちの外装ケース(16)の外側の部位に接続されるバイパス通路(44)とを設けた。【選択図】図１