Abstract: A drinking water device including a water storage section that stores drinking water inside an installation type casing; a water outlet that is connected to the water storage section via a passage and is located outside the casing; filtering device that is provided in the passage on further upstream side of the water outlet so as to be freely attachable/detachable; and a flow rate switch, which is provided between the water storage section and the water outlet and which is capable of detecting flow rate of the drinking water and also capable of outputting an actuating signal upon detecting the flow rate within a preset flow rate range.