The invention relates to a system (1) for a garment care device (20, 25) comprising a steam generator (7). The system (1) comprises a pressurization unit (2). The pressurization unit (2) comprises a chamber (3) for receiving water from a water supply system (5) and for delivering the received water towards the steam generator (7), and an actuator (8) cooperating with a retention member (9). The actuator (8) is adapted to displace and load the retention member (9) when water is received in the chamber (3). The retention member (9) is adapted to unload and apply a force to the actuator (8) after water has been received in the chamber (3) to pressurize water received in the chamber (3). The retention member (9) has a stiffness coefficient that varies as a function of displacement of the actuator (8). This invention allows that the flow of pressurized water from the chamber to the steam generator is more purposively controlled so that a given desired steam profile can be generated.