HOT WATER STORAGE TANK UNIT

PROBLEM TO BE SOLVED: To change a drain hose outlet position according to positional relationship between an installation place of a hot water storage tank unit and a burying part of a drain groove, in pulling out the drain hose connected to an outlet of a pressure relief valve opened when a pressure in a hot water storage tank reaches a prescribed value or more, to a lower part of a bottom plate of an outer casing. SOLUTION: In this hot water storage tank unit which is composed of the hot water storage tank 2, and the outer casing 3 receiving the hot water storage tank, and provided with tank supporting pieces 31b vertically disposed on a front section and a back section of the bottom plate 31 of the outer casing 31 in a state of extending upward, and in which the tank supporting pieces are fixed to a lower peripheral face of the hot water storage tank to support the hot water storage tank in the outer casing, the bottom plate 31 has an opening 31c positioned between the front section and the back section where the tank supporting pieces 31b are vertically disposed, in a state of being longitudinally continued in the lateral direction, and a cover plate 38 made of foamed resin and closing the opening 31c is detachably mounted on the bottom plate 31. COPYRIGHT: (C)2011,JPO&INPIT