A system for sanitizing a drinking water-carrying device includes a filter candle that can be installed in a filter head. The filter head has one inlet and one outlet, and the system includes a sanitizing cartridge which can replace the filter candle. The sanitizing cartridge includes a sanitizing agent that can be flushed into the drinking water-carrying device via the filter head.

A filter unit includes an inlet for receiving unfiltered water. A first fluid path directs water through a membrane and a filter element to a first outlet. Additionally, a second fluid path directs water across the membrane and to a second outlet.

A water purification filter element is provided. The water purification filter element may include a filter bottle, a filter material, an end cover, and a water self-stopping and passing structure.

A water purifier includes a raw water flow path into which raw water is introduced, a clean water flow path connected to the raw water flow path and having a water discharge nozzle disposed at an end, a filter device disposed in the clean water flow path, and to which a filter is installable to filter the raw water, a drain flow path branched off from the clean water flow path between the filter and the water discharge nozzle and connected to a drain port to drain water in the clean water flow path to outside, a drain valve configured to open or close the drain flow path, and a controller configured to determine a remaining life of the filter on a point in time at which the filter has been replaced and control the drain valve to perform a cleaning operation based on the remaining life of the filter.

A dental instrument water supply filter includes a hollow cylindrical body which bounds an interior area. The interior area houses a plurality of iodinated resin particles. A pair of water permeable discs are positioned in the interior area of the body at opposed axial ends. End caps close the interior area of the body at the respective opposed ends, and each end cap includes a respective removable fluid fitting. Water that is used in connection with the operation of a dental instrument is passed through the filter. The filter provides filtration and reduces microorganisms in the water that is passed therethrough and also releases ions into the water that are effective to reduce the growth of contaminants in the water lines to the instrument.

A two-stage filter enclosed within a single vessel is provided. The two-stage filter is provided in the form of the vessel having a first filtration stage configured to capture particles of a first size, and a second filtration stage downstream of the first filtration stage and in fluid communication with the first filtration stage configured to capture particles of a second size, wherein the first size is larger than the second size. The first filtration stage may comprise a porous media. The second filtration stage may comprise one or more membrane filters.

Ultraviolet irradiation of liquids for purposes of sterilization, disinfection, cleaning and/or treatment. A liquid collection reservoir can receive an inflow of a liquid. A filtering unit can filter the inflow of liquid received by the liquid collection reservoir. A liquid chamber stores the liquid. Ultraviolet light emitting sources located about the liquid chamber irradiate the liquid in the liquid chamber with ultraviolet light. A control unit, operatively coupled to the ultraviolet light emitting sources, controls the irradiation of the liquid in the liquid chamber with the ultraviolet light emitting sources. The control unit is configured to control an intensity and a duration of the irradiation as a function of time that the liquid is stored in the liquid chamber and the amount of the liquid that is in the liquid chamber.

A filter for a water purifier includes a filter housing that defines an inlet and an outlet, and a filter module disposed inside the filter housing and configured to purify water received through the inlet and supply purified water to the outlet. The filter module includes a carbon block that includes a mixture of: activated carbon having a weight corresponding to 40 to 50% of a weight of the mixture, a binder having a weight corresponding to 5 to 15% of the weight of the mixture, iron hydroxide having a weight corresponding to 10 to 20% of the weight of the mixture, and titanium oxide having a weight corresponding to 30 to 40% of the weight of the mixture.

A cartridge carrier having a skeleton housing with a cartridge cradle for supporting a cartridge dispenser therein and a connector on the skeleton housing for supporting a further dispensing cartridge outside of the skeleton housing.

A dispensing system comprising a housing supporting a first cartridge and a second dispensing cartridge where the first cartridge is positionable in a first compartment of the housing but not in a second compartment of the housing to prevent a change in an axial position of the first cartridge and the second dispensing when a cartridge is replaced in the housing.