A Water System for providing water to at least one connected device through a fluid path and being able to disinfect the fluid path by means of thermal disinfection, the Water System comprising: an inlet (111, 301) for receiving water to the Water System; a heating unit (115, 325) configured to heat water within the Water System; a filter unit (122, 314) configured to filter water within the Water System in order to provide filtered water to an outlet (112, 302); an actuator (117, 122, 324, 333) configured to control the flow of the water from the heating unit to the outlet; a fluid path connected to the outlet, the fluid path comprising at least one connector (150, 151, 152) configured to connect to at least one device to which water is provided by the Water System; a temperature sensor (118, 358) located at the fluid path and configured to measure the temperature of a fluid in the fluid path; a control unit (119, 329) connected to the heating unit, the actuator and the temperature sensor, the control unit being configured to control the flow of water by means of the actuator, to control the heating of water by the heating unit, and to read the temperature as measured by the temperature sensor; the control unit is configured to start the disinfection of the fluid path by controlling the heating unit to heat water and controlling the actuator to enable heated water to flow to the outlet and further into the fluid path; and wherein the temperature sensor (118, 358) is located at a location of the fluid path which experiences the lowest, or one of the lowest, temperatures during thermal disinfection or in the proximity thereof; and the control unit is configured to read the temperature as measured by the temperature sensor during the disinfection, and to calculate an achieved disinfection dose based on the read temperature, and to compare the achieved disinfection dose with information representing a set disinfection dose, and to discontinue the disinfection if the achieved disinfection dose equals or exceeds the set disinfection dose. an inlet (111, 301) for receiving water to the Water System; a heating unit (115, 325) configured to heat water within the Water System; a filter unit (122, 314) configured to filter water within the Water System in order to provide filtered water to an outlet (112, 302); an actuator (117, 122, 324, 333) configured to control the flow of the water from the heating unit to the outlet; a fluid path connected to the outlet, the fluid path comprising at least one connector (150, 151, 152) configured to connect to at least one device to which water is provided by the Water System; a temperature sensor (118, 358) located at the fluid path and configured to measure the temperature of a fluid in the fluid path; a control unit (119, 329) connected to the heating unit, the actuator and the temperature sensor, the control unit being configured to control the flow of water by means of the actuator, to control the heating of water by the heating unit, and to read the temperature as measured by the temperature sensor; the control unit is configured to start the disinfection of the fluid path by controlling the heating unit to heat water and controlling the actuator to enable heated water to flow to the outlet and further into the fluid path; and wherein the temperature sensor (118, 358) is located at a location of the fluid path which experiences the lowest, or one of the lowest, temperatures during thermal disinfection or in the proximity thereof; and the control unit is configured to read the temperature as measured by the temperature sensor during the disinfection, and to calculate an achieved disinfection dose based on the read temperature, and to compare the achieved disinfection dose with information representing a set disinfection dose, and to discontinue the disinfection if the achieved disinfection dose equals or exceeds the set disinfection dose.