Abstract: The present invention relates to a household water purification device, comprising electrically driven water purification means, an inlet for contaminated water, which inlet is in fluid communication with the water purification means and is connected to the water supply system when the device is operational, an outlet for dispensing purified water, which outlet is in fluid communication with the water purification means, water flowing from the inlet to the outlet via the water purification means in operational conditions, wherein said device further comprises a closing unit for interrupting the flow of water, a sensor that senses the availability water supply, and control means that controls the closing unit and the water purification means.