A water purifier system includes a base unit and a filter unit detachably connected to the base unit. The base unit is provided with a water inlet tube for guiding water to the filter unit and with a water outlet tube for guiding purified water from the filter unit. The filter unit includes a container surrounding a replaceable filter element and covered by a removable lid. The container is provided with a water inlet member for guiding unfiltered water from the water inlet tube into the container. The replaceable filter element is provided with a water outlet member for guiding purified water from the filter element to the water outlet tube of the base unit. The water outlet member extends through an opening in the removable lid that covers the container.