The invention relates to portable liquid supply device, mainly for water from central and other sources or for suspensions, for example pharmaceutical products and nutrient liquids. The invention can be used in household, outdoors, in the garden plots, in health care institutions, for example, for patients with dysphagia, as the source of purified drinking water or nutrient liquids, which go to a patient easily. Liquid supply device, includes raw liquid vessel, pressure generating means, liquid treating unit, comprising a lid, liquid supply means, liquid treating element and raw liquid inlet element, characterized in that is configured to supply treated liquid in portions from 5 to 100 ml, with velocity 0.5 to 10 ml/sec.

A method for treating water in a spa or a hot tub includes, for example, suspending a water treatment dispenser from an upper end of a filter cartridge disposed in a skimmer of the spa or the hot tub. The dispenser includes a water treatment material. A supply of water is passed from the spa or the hot tub into the skimmer and through the filter cartridge so that the dispenser suspended in the filtered water in the filter cartridge is operable to dispense the water treatment material from the dispenser, and a supply of treated filtered water from the filter cartridge is returned to the spa or the hot tub. A cover, for example, may be employed when the dispenser is not used.

A filter apparatus includes a filter, such as a cartridge, positioned within a housing. The filter apparatus has multiple ports and valves, so as to allow a user to easily switch between a filtration mode of filtering fluids and a maintenance mode of cleaning the filter. The filter can have a filter substrate in a housing and after filtrate builds up on the substrate, the substrate can be cleaned by directing a spray of fluid, such as from a ring of nozzles at the top of the housing, onto the substrate. A maintenance port can be provided to drain the debris washed from the substrate. The filter can switch between a backwash mode and a filtration mode.

The invention is directed to point of use devices and appliances for alkalizing and/or adjusting the oxidation/reduction potential of water that is to be ingested. The devices comprise straws, carafes, countertop units, water bottle units and any other devices that will treat the water at the point of use. The water will flow through the point of use devices or appliances longitudinally or radially. The point of use device or appliance will contain an alkalizing formulation that will increase the pH of the water to preferably above about 8 and the oxidation/reduction potential to about −100 and −700. The amount of water that can be treated will depend on the amount of the oxidation/reduction potential and alkalizing formulations used and the size and capacity of the device or appliance for the alkalizing and oxidation/reduction potential formulations. The alkalizing formulation will supply to the water being treated one or more of potassium, calcium and magnesium ions. The water prior to contacting the treatment compound can be filtered through a purification formulation to remove particulates, heavy metals and various organic compounds. The purification formulation can be a form of activated carbon.

A filtration system for a pet water fountain is provided. The filtration system utilizes a pump placed within or along a watering bowl. The water filtration system also utilizes a multi-stage filtering device. In one aspect, the multi-stage filtering device includes a first filtering stage representing copper zinc alloy particles, and a second filtering stage representing granulated activated carbon particles. Each stage may constitute filtering material that is separated into an array of cells residing along a vertical frame or is separated into stages placed in series within a tubular cartridge. A method for filtering water in a pet fountain is also provided herein.

A filtration system effective to filter bacteria, cysts, and viruses, and to alter the surface tension of water. The small scale filter includes a rigid or semi-rigid core having perforations formed therein, and surrounded by one or more layers of filter media formed into a pleat pack filter arrangement.

An apparatus for filtering water has a valve head and a filtration/purification canister removably mountable thereon. Connecting the canister to the valve head automatically opens a check valve in the valve head to permit water to flow from the valve head into and through the canister, and then back to and through the valve head to an outlet port. Disconnecting the canister from the valve head automatically closes the check valve, stopping the flow of water. A bypass valve is provided in the valve head to permit a sanitizing solution to flow through the valve head and along the lines of the water distribution system to sanitize the system, while bypassing the canister. The outlet port may be directly connected to an appliance that uses water, to eliminate possible contamination that may occur when water is brought indirectly from the outlet port to the appliance instead.

Systems and methods for passively dosing fluid with a consumable additive in a controlled and measured fashion. A capsule containing the additive is placed in a fluid reservoir and passively doses static water in the reservoir over time. Instead of directly exposing the additive to the dispensing system's fluid, fluid within the capsule's internal volume becomes saturated with dissolved additive and then diffuses to the dispensing system's fluid through one or more openings. The one or more openings are sized so the that the diffusion occurs at a predetermined rate, and are positioned on the capsule to prevent an undesirable fluid exchange which extends the life of the additive and maintains a constant diffusion rate. The size of the cartridge can be selected to control the volume of fluid that is passively dosed within the reservoir, thereby controlling an overall concentration of additive in the total volume dispensed.

A fluid treatment apparatus and related methods involving the use of replaceable treatment cartridges that include a treatment media, wherein the treatment cartridge is electrically enhanced to form regions of differing polarity within the cartridge. The treatment cartridge can include a pair of fixed polarity conductors that can be electrically connected to a power source so as to induce regions of differing polarity within the cartridge. The fluid treatment apparatus can be utilized to treat liquids including aqueous solutions as well as gases such as an air supply by exposing the fluid to the regions of differing polarity.

An installation structure of an external filter case for a refrigerator is provided. The filter case may include a main body that provides an inner space in which an internal line may be installed and water filters may be installed, and a cover that covers the inner space of the main body and is detachably coupled with the main body. The main body may have an open front side and may include bosses that protrude from its bottom face. The cover may include insertion holes into which the bosses may be inserted. A lower portion of the main body may be coupled with a lower portion of the cover. Magnets may be installed in upper portions of the main body and the cover, respectively, such that the main body and the cover may be coupled with each other by a magnetic force.