Abstract: A filter apparatus for water purification is provided. A compact housing has a disk filter including concentric chambers connected in series with divided water flow in opposite directions in each chamber with one water tank input and one purified water output.

Abstract: A method of removing olefinic impurity, such as perfluoroisobutylene, from fluoroperhalocarbon liquid, such as perfluorinated liquid, comprising the step of contacting the fluoroperhalocarbon liquid with a body of particles comprising particles selected from the group consisting of alumina, alkali metal oxide, alkali metal hydroxide, alkaline earth oxide, alkaline earth hydroxide, silicon oxide, tin oxide, zinc oxide, alkaline earth basic carbonate, and alkaline earth basic phosphate, transition metal oxide particles and mixtures thereof.

Abstract: The present disclosure concerns a storm runoff filtration system for placement into in-place storm drainage systems. In locations where runoff is directed vertically or nearly vertically downward on gravity flow, an inlet fluid guide of the system directs fluid to a flow through a filter cartridge. The filter cartridge is removable and rechargeable with a selected filter media.

Abstract: A steam iron comprises a water reservoir, a steam chamber, a water-supply system for conveying water from the reservoir to the steam chamber and a metering system for injecting a phosphonate compound which acts to inhibit scale growth into the reservoir.

Abstract: A water purification device used in connection with the brewing of coffee in an automatic drip coffee maker has an annular sleeve contained within the moveable basket of the coffee maker. The water purification device has an activated charcoal resin operable to filter and purify hot water flowing from the coffee maker through the annular sleeve. The lower end of the sleeve has a plurality of circumferentially spaced openings to allow lateral movement of the water and steam away from the annular sleeve.

Abstract: A shower filter assembly having an in-line reversible filter, changeable by unscrewing two portions of the housing. The housing exterior includes a plurality of gripping means to allow easy opening and closing of the housing and to prevent slippage of the hands of a user gripping the two portions, even when wet. The shower filter assembly includes a separate internal filter element that may be easily inserted into or removed from the shower filter assembly to allow the internal filter element to be easily reversed for longer use.

Abstract: A dispensing device having a container body defining a solution retaining chamber therein, the container having an outlet for dispensing the solution from the chamber and means for removing a component from the solution as the solution is dispensed from the chamber through the container outlet. A method is provided for administering to a patient a pharmacologically active substance which substance is stable only at a pH value which is extreme in the acidic or alkaline region and at which pH value the substance cannot be administered without causing discomfort and/or injury to the patient. The substance is maintained in a solution or dispersion at the pH at which it is stable until the time of administration. At this time the substance is administered through a chamber containing an ion exchange resin which changes the pH of the solution or dispersion to a value which will not cause discomfort and/or injury to the patient.

Abstract: A water filter including an inlet assembly which comprises a prefiltering foam tip. The inlet hose includes an adjustable float and a weight on the end of the hose which allows a given length at the end of the inlet hose to extend below the surface of the water being filtered. The water filter further includes a check valve assembly to relieve pressure buildup inside the pump. A unique lever-action handle, in combination with a rocking piston, allows efficient filtering with few moving parts. The filter components are easily replaceable. The main filter assembly is suspended resiliently at its periphery to provide shock-absorbing characteristics. The filter also includes an adaptor base which allows for a direct connect between the vessel into which water is filter. The water filter also provides a unique method of storing the inlet hose to render the water filter easy to carry and prevent foreign objects and debris from entering into the area of working parts.

Abstract: A water purification device for attachment to a hose or other water supply such that water flowing through the device comes in intimate contact with a treatment media including free available silver ions to provide a anti-bacteria and germicide treatment of the water flowing therethrough. Preferably, the device includes an inner chamber having opposed pairs of shells, and treatment media is disposed in at least one of such shells.

Abstract: A flat filter assembly may be installed in relatively narrow spaces which would otherwise be wasted such as the space beside a kitchen cabinet and the basin of a kitchen sink, inside a freezer door or on a countertop. The filter assembly includes a housing, preferably U-shaped, having a plurality of transversely extending ribs, formed in the opposed side walls of the housing, which reinforce the housing and which cause a generally serpentine flow of water through the housing during operation of the filter. Protrusions preferably are formed in the housing in addition to the ribs to strengthen further the housing and to aid in preventing the formation of channels through the granulated filter medium contained within the housing. The filter housing is preferably manufactured via a blow molding process.

Abstract: A pillow for placement in enclosed areas utilized to collect and contain spilled or leaked hydrocarbons such as boat bilges and sumps absorbs pollutants that come in contact. The absorbed material is solidified within the pillow into a rubber-like mass. The consolidated mass will float indefinitely and is easily retrieved and handled for disposal. The pillow will not leech solidified hydrocarbons when exposed to pressure limits used to determine landfill suitability.

Abstract: A device to filter water having a tubular housing with five chambers therein divided by filter members. The first chamber includes a granular activated carbon filtering medium, the second chamber includes an iodinated anion resin filter medium, the third chamber being empty, the fourth ion includes an anion exchange filtering medium, and the fifth chamber includes a granular activated carbon filtering medium. A faucet adapter is removably connected to the source of water and it is designed to limit the water pressure applied to the device.

Abstract: A new and improved self-contained, portable, treated drinking water, refrigerator storage jug assembly is provided. The jug assembly includes a storage jug configured to be placed in a refrigerator. A water treating subassembly is mounted to the back of the storage jug and is placed in the refrigerator together with the jug. A fluid connector for connecting the portable jug and water treating subassembly to a kitchen sink for refilling is provided. In a preferred embodiment, the water treating subassembly includes a plurality of water treating modules interconnected to each other. Also in the preferred embodiment, a modular, leak-free flow block connector and a treatment module monitoring device form a part of the overall jug apparatus.

Abstract: The present invention provides a water activator for treating tap water under an electrostatic field to activate the tap water. The water activator of the invention includes: an insulating base (1); a power unit (2) mounted on the insulating base (1) and having an insulating transformer (12) disposed therein; an electrode plate (11) placed on a top face of the power unit (2) and covered with an insulating material (11a); and a tank unit (3) replaceably mounted on the power unit (2), the tank unit (3) having a water reservoir (14) for storing tap water and a cock (17) attached to a lower end of the water reservoir (14). One end of a secondary output voltage of the insulating transformer (12) is insulated and disconnected while the other end of the secondary output voltage is connected to the electrode plate (11).

Abstract: A method for inhibiting the growth of microorganisms on sorbents selected from the group consisting of absorbents and adsorbents that are susceptible to undesirable microorganism growth when exposed to water containing such organisms, said method comprising passing water to be treated by said sorbent over brass particles prior to or concurrently with contacting said sorbent with said water, the contact with the brass particles being sufficient to inhibit the growth of microorganisms on said sorbent while not releasing more than 1 ppmw copper ions and 5 ppmw zinc ions into the effluent water. Also disclosed are related sorbent elements and pretreatment packets used in said method.

Abstract: A fluid-collecting device for collecting fluid from a fuel tank having an opening leading to the inside thereof including an elongated bag which is of a size which can pass through the opening, desiccant material in the bag, an elongated cord sewn to the top of the bag, and a disc to which the outer end of the cord is attached, the disc being of a larger size than the opening so that it cannot enter the opening, to thereby provide access to the outer end of the cord which can be grasped to withdraw the bag of desiccant material from the tank.

Abstract: A portable, manually-operated water filtration pump for purifying water. The pump includes an inexpensive, disposable filter cartridge which can be easily changed when the filter elements are no longer effective. The pump uses a lever to actuate a double-acting piston. The lever is collapsible to one side of the pump for compact storage. The filter cartridge is a tubular cylinder having an inner bore forming the pump cylinder. A cylindrical mechanical filter is concentric with and adjacent to the inner bore to filter out particulates larger than 0.3 microns. A fluidized granular activated charcoal filter surrounds the mechanical filter to absorb chlorine and chlorine-related compounds such as herbicides and pesticides. The pump pumps into a bottle adaptor which will fit most standard water containers. A prefilter is provided to screen out large particulates from the pump to enhance the life of the filter elements.

Abstract: A water filtering bottle which includes a water filtering apparatus incorporated within the neck of the bottle. During normal consumption of the water from the water filtering bottle, water is filtered by the water filtering apparatus to remove unwanted substances in the water such as pesticides, chlorine, particulate matter, algae, bacteria, heavy metals, and improves odor and flavor of the consumable water.

Abstract: An axial flow filtration cartridge, a system, a support assembly, an apparatus, as well as a process are provided for removing particulate matter as well as dissolved heavy metal ions and the like from an aqueous effluent stream. The invention is useful for removing contaminants from industrial waste streams. The cartridge contains features which make it relatively resistant to fouling by solid particles. Additionally, the cartridge has no central void volume. No separate housing for the cartridges is required. In a system embodiment the cartridge has a filtering chamber containing absorbent clay particles confined between porous liquid-permeable retainer. An upstream cartridge cap and a downstream cartridge cap removably receive the ends of the filter cartridge in a liquid-tight seal. The flow of aqueous effluent to each of the cartridges is individually controlled.

Abstract: A capsule for absorbing liquid waste which contains a a capsule body, a capsule cap joined to said capsule body, and a powder disposed within said capsule. The body of the capsule consists essentially of water-soluble material. Each of the capsule cap and the capsule body contains a domed-shape end section and a linear body section, each of which contains several orifices. The density of orifices in the domed-shape sections exceeds the density of the orifices in the linear body sections. Disposed within the capsule is a powdered absorbent material.

Abstract: A water filtration device is disclosed which, in one aspect, has a hollow device body with filter apparatus therein. The device body is removably nested in a device extender which, upon removal from the device body is invertible and re-emplaceable on the device body to provide an extended member for facilitating the scooping water to be flowed through the device. With appropriate filter media in the hollow device body, potable water is produced. A system is disclosed including the device body, device extender, and a water container securable beneath the device body to receive and store the purified water flowing from the device body.

Abstract: Water filter module for filtration of water used to brew coffee, having a series of vertically aligned filters placed in a body member and having a charcoal filtration member bounded by screen at its upper and lower ends and in the water filter module. An alternate embodiment includes a water permeable containment device having encapsulated filtering medium.

Abstract: An additional trough for an aquarium filter container comprising a rectangular body having an open top and consisting of a bottom panel, two long-side panels and two short-side panels, said bottom panel being formed with a plurality of equidistant longitudinal and transverse grooves making a plurality of intersecting points, a perforation being formed on alternate one of said intersecting points and equally distant from each other, said bottom panel further having at the outer side a protruded portion which is smaller than the open top of said rectangular body in area and extends outwardly to a flange and downwardly to form four elongated projections, said bottom panel having an outer side formed with a plurality of annular portions concentric with corresponding perforations.

Abstract: A filter for disinfecting non-potable water disposed in line in a water delivery pipe such filter having a plurality of aligned chambers is disclosed. The first chamber contains biocidal resin which imparts a biocide to the water as it passes therethrough. The water then passes through a turbulating disk to an extended contact time chamber of a selected cubic volume to allow further contact time between the biocide and any microorganisms in the water. The water then passes through a biocide removal chamber containing media which removes the biocide from the water. The water then passes through a chamber containing bacteriostatic media which acts to prevent back contamination from the effluent end of the filter. The water then passes through a 3-micron screen which acts to retain protozoan cysts within the filter as the water passes on in the water delivery pipe.

Abstract: A portable curb inlet sediment filter which has a box filter frame and a primary baffle panel defining a filter chamber, to be filled with a particulate filter medium, such as gravel, for sediment removal, and an overflow chamber. The overflow chamber has at least one overflow baffle panel in order to provide a hydraulic opening and a peripheral end cap chamber. The end cap chamber is gravel filled in order to clarify water escaping around the front of the frame and into the hydraulic opening through the side panel. The filter frame and baffle panels are a mesh construction having apertures smaller in size than the particles of gravel to be contained.

Abstract: A multi-section manifold system containing a number of replaceable filter and purification cartridges for treating the water supply of medical and dental facilities. The system operates to introduce increased concentrations of a preferred bactericide to the water immediately adjacent patient dispensing appliances. Control valving regulates and segregates flow through separate cartridges at the manifolds. A first manifold removes coarse particulates and sediment and exposes the water to an initial bactericide. A second manifold removes finer contaminants. A third concentrator manifold contains a bactericide cartridge having a percolation chamber which enhances the iodine concentration of the water in the range of 3 to 10 ppm at the patient dispensing apparatus. The percolation cartridge includes proximal and distal bactericide chambers which are, separated by an intermediate reservoir or percolation chamber.

Abstract: A water purifier for supplying high purity water with a low total organic carbon content. The purifier includes removable cartridges that contain a series of organic and ion exchange purification media. Special couplings are used to permit the cartridges to be easily and quickly connected to and removed from the water purifier. In addition, the cartridges contain a check valve to minimize water drainage from the cartridge when the cartridge is removed. Selected water purifier components are constructed of fluorinated polyethylene.

Abstract: A water purifier for supplying high purity water with a low total organic carbon content. The purifier includes removable cartridges that contain a series of organic and ion exchange purification media. Special couplings are used to permit the cartridges to be easily and quickly connected to and removed from the water purifier. In addition, the cartridges contain a check valve to minimize water drainage from the cartridge when the cartridge is removed. Selected water purifier components are constructed of fluorinated polyethylene.

Abstract: A container (10) for a filter (12) has a cylindrical housing (16) receiving the filter (12) and permitting replacement of the filter (12) from an open end. An enlarged diameter fitting (22) is secured about the open end of the cylindrical housing (16) and has retaining lugs (30) for retaining a removable end cap assembly. The removable end cap assembly has an anchor plate (40) with projections (46) that are received within arcuate slots (32) of the end fitting (22). The anchor plate (40) is coupled to an end cap (42) for rotation to position the projections (46) beneath the lugs (30) to restrain outward movement of the anchor plate (40). A single bolt (44) through the end cap (42) is threaded to the anchor plate (40). Rotation of the bolt draws the anchor plate (40) tightly against the lugs (30). The end cap (42) is simultaneously forced against an O-ring (36 ) disposed on the outer end (50) of fitting (22) for sealing the end cap to the container. An embodiment of FIG.

Abstract: Disclosed is a water filtration medium capable of removing heavy metals from ground water and surface supplies. This medium comprises a gamma form of manganese dioxide that has been comminuted and divided into fractions according to mesh size, including fractions of 10 to 40 mesh, 40 to 100 mesh, and 100 to 325 mesh. The particles in a given mesh size are treated with a reducing agent such as ferrous sulfate and then washed with water to remove iron precipitates and fines. The washed particles are treated with a solution of sodium hydrosulfite and sodium bisulfite. The treated particles are then neutralized with sodium hydroxide to remove remaining acidity. The neutralized particles are washed again in order to remove spent chemicals and undissolved metals. The particles are then dried prior to use as a filtration medium. Also disclosed is a disposable cartridge for housing the filtration medium, a method of using the medium, and a means for preparing the medium.

Abstract: A disposable filter including a flexible casing and at least one filter element. The flexible casing and filter elements are expendable from a substantially flat form for use and are collapsible to a substantially flat form after use for disposable.

Abstract: A method of making coffee from ground coffee beans and water includes providing an automatic drop coffee maker including a heater mechanism for heating the water wherein the heater means has a hot water drip outlet, a basket for holding the ground coffee beans wherein the basket has an inlet and an outlet and is positioned below the hot water drip outlet such that the hot water drips into the basket and mixes with the ground coffee beans, and a collection vessel for collecting hot water after it mixes with the ground coffee beans. The method further includes providing a water filtration device for filtering impurities from the water; positioning the water filtration device between the hot water drip outlet and the ground coffee beans; heating the water using the heater mechanism; and passing the heated water through the water filtration device and the ground coffee beans and into the collection vessel.

Abstract: This new containment system consisting of multiple drains in a common manifold, provides a simple but automatic closure device that requires minimum and low cost maintenance. Storm water can pass through the drains and does not require manual pumping like the present systems. Small amounts of contaminants will be absorbed as the water passes through the drain ensuring the storm water leaving the containment area is free of contaminants. The system is custom designed for each installation and each potential contaminant, making it very adaptable.

Abstract: The present invention resides in a beverage making machine containing a purification unit for purifying potable water. The purifying unit contains a purifying agent and is detachably mounted on either the water reservoir or on the basket where water contacts the brewing agent or beverage making agent of the beverage machine.In an alternate mode, the water purifying unit is located below the water reservoir of a beverage making machine. The bottom member of the water purifying unit is detachably mounted on the bottom of said units with screw-on means.

Abstract: A solid phase extraction device has a solvent-compatible permeable membrane with a bubble point greater than the normal operating pressure differential used and a sorbent material retained by two disks or frits so that when pressure is applied, the sample to be processed will pass through the membrane, but the membrane will not permit air to pass therethrough, and the sorbent remains wet throughout the process. The device has an input port and an output port and operates to maintain a pressure differential between the ports. Sorbent material is entrapped between two disks or frits. Located above the sorbent material is a support having a grid surface. The support prevents the frit from "riding up" the column of the barrel. Ultrasonically welded to the support is a solvent-compatible permeable membrane. The membrane is hermetically sealed to the support and the support is self-locked to the interior barrel of the device.

Abstract: A personal, portable water filtering device is provided for use in filtering water taken from public drinking fountains, public wash basins or other public water sources. The preferred device includes a flexible attachment means for engaging the outlet of a water fountain, a tube connecting the attachment piece to a pump disposed between two check valves, a filter disposed between or within the pump and a tube connecting the filter to a mouthpiece. The user inserts the attachment means into the outlet of a water fountain or standing water supply which allows water to proceed up the first tube and into the hand-pump. The user then squeezes the hand-pump which forces water through the filter and the filtered water exits through the mouthpiece into the user's mouth. The device is lightweight and collapsible and will fit into the back pocket of athletic wear worn by joggers or other athletes.

Abstract: A self-contained, disposable water filter cartridge for a water treatment system for treatment of potable water has one-way ball check valves at the water inlet and water outlet to the cartridge. The generally cylindrical water filter cartridge is generally spherical on one end while substantially planar on the other end and is of a welded plastic construction. Asymmetrical lugs radially disposed about the periphery of the planar end are adapted to mate with an apertured deck of a water treatment system.

Abstract: A manifold mounted liquid filtration system including a disposable filter cartridge having first and second radial flow filtration stages containing filtration media of uniform porosity. A first stage includes a pair of annular, concentrically mounted, fibrous sediment and cast carbonaceous filter media. A second stage includes an annular cast carbonaceous filter media. Porous stage separators sequentially direct liquid flow into cavity spaces between the sidewalls of each stage and a liquid impermeable housing where the flow is radially re-directed inward to a center outlet bore. The first stage filters suspended sediments, lead and other heavy metals. The second stage removes suspended bacteria, parasites volatile organic contaminants, herbicides, pesticides, industrial and agricultural contaminants, and the like. Various cartridge constructions having alternative O'ring sealed end caps and internal arrangements of stage separators are disclosed.

Abstract: A filtering module includes a housing consisting of an upper housing section and a lower housing section and a connecting member for connecting the upper and lower housing sections. The upper housing section has a first water port in a first end thereof and a pair of substantially L-shaped recesses in a second end thereof. The lower housing section has a second water port in a first end thereof and a second pair of substantially L-shaped recesses in a second end thereof. The connecting member includes a filtering mesh and two pairs of L-shaped protrusions formed on an outer periphery thereof to be fittingly received in associated L-shaped recesses.

Abstract: A self-contained electronic monitoring unit for attachment to a device, such as a water filter, designed to be used until the occurrence of a predetermined event such as a predetermined number of uses, includes transducer for providing distinct outputs such as different audio output signals. A programmed integrated circuit and use detecting means such as electrical contacts detect each use of the device and monitor when the device is operational, when the end of life event is imminent and has occurred. The integrated circuit is programmed to operate the transducer to produce output signals during each use of the device informing the user that the device is operational, that the predetermined event or end of useful life is imminent and that the useful life has expired. The unit includes a battery for supplying power to the transducer and integrated circuit.

Abstract: This invention concerns a method and apparatus for collecting and preserving field water samples on site in which a salt solution, contained in a syringe by a rupturable thin film membrane, is injected through a strong acid or base ion exchange filter to produce a required amount of either nitric acid, sulfuric acid or sodium hydroxide for sample collection and preservation.

Abstract: A filter element 28 for a gravity-flow water filter. An inlet screen 44 divides a cylinder 48 into two functionally distinct portions, an overflow chamber 24, and a filter body 26 which contains a filter medium 54. A wire half-loop 16 suspends overflow chamber 24 from an adjustable water source and positions overflow chamber 24 to catch the water outflow from the source. Wire half-loop 16 also positions overflow chamber 24 at a distance from the source so that there is a gap 22 between overflow chamber 24 and the source. The potential for water rising and spilling from overflow chamber 24 induces a user to adjust the source flow to less than a characteristic rate. When the flow is adjusted so that water level in overflow chamber 24 is not rising, the water level continues dropping until the flow of water from the source continuously enters the screened entrance of filter body 26 with no appreciable pressure head.

Abstract: A drinking water purification system includes a flat filter assembly which may be installed in relatively narrow spaces which would otherwise be wasted such as the space beside a kitchen cabinet and the basin of a kitchen sink, inside a freezer door or on a countertop. The filter assembly includes a housing, preferably U-shaped, having a plurality of transversely extending ribs, formed in the opposed side walls of the housing, which reinforce the housing and which cause a generally serpentine flow of water through the housing during operation of the filter. Protrusions preferably are formed in the housing in addition to the ribs to strengthen further the housing and to aid in preventing the formation of channels through the granulated filter medium contained within the housing. Internal or external quick connect couplers preferably connect the filter assembly to a source of untreated water and to a dispenser.

Abstract: Water filter module for filtration of water used to brew coffee, having a series of vertically aligned filters placed in a body member and having a charcoal filtration member bounded by screen at its upper and lower ends and in the water filter module.

Abstract: As filter canisters are utilized by recreational vehicles, provision of a single filter canister to the primary water input line exteriorly of the vehicle is provided. The recreational vehicle includes a filter canister mounted exteriorly of the recreational vehicle exteriorly adjacency to the vehicle's fill nozzles, wherein a first fluid supply conduit is directed to the filter canister and in turn mounts a second fluid supply conduit directed into the fill nozzle of the vehicle to effect filtering of the primary water supply of the vehicle. A flange plate is slidably received within a mounting flange for selective positioning and mounting of the canister during use permitting ease of disassembly of the canister relative to the recreational vehicle for ease of transport of the vehicle.

Abstract: The present invention provides a one piece or unitary filter assembly for attachment to a waterline to remove chlorine and other substances from water. This unitary assembly provides a rechargeable or reusable filter assembly for use with hot water passing through a concentrated bed of 100% granulated or powdered zinc and includes a removable diverter/screen element to enable zinc to be added to or removed from an internal chamber formed therein. The preferred method of treating water utilizes 100% zinc filter media to react with or remove chlorine and other substances more efficiently from water, thereby allowing a greater volume of water to be treated, as well as the treatment of water at elevated temperatures. The pure zinc filtering media used has the added advantage of achieving a more efficient oxidation of chlorine while meeting current EPA standards.

Abstract: An axial flow filtration cartridge, a system, a support assembly, an apparatus, as well as a process are provided for removing particulate matter as well as dissolved heavy metal ions and the like from an aqueous effluent stream. The invention is useful for removing contaminants from industrial waste streams. The cartridge contains features which make it relatively resistant to fouling by solid particles. Additionally, the cartridge has no central void volume. No separate housing for the cartridges is required. In a system embodiment the cartridge has a filtering chamber containing absorbent clay particles confined between porous liquid-permeable retainer means. An upstream cartridge cap and a downstream cartridge cap removably receive the ends of the filter cartridge in a liquid-tight seal. The flow of aqueous effluent to each of the cartridges is individually controlled.

Abstract: A new and improved self-contained, portable, treated drinking water, refrigerator storage jug assembly is provided. The jug assembly includes a storage jug configured to be placed in a refrigerator. A water treating subassembly is mounted to the back of the storage jug and is placed in the refrigerator together with the jug. A fluid connector for connecting the portable jug and water treating subassembly to a kitchen sink for refilling is provided. In a preferred embodiment, the water treating subassembly includes a plurality of water treating modules interconnected to each other. Also in the preferred embodiment, a modular, leak-free flow block connector and a treatment module monitoring device form a part of the overall jug apparatus.

Abstract: A regenerable deep bed filter element and method for making it, the element being provided as a closed system, in the case of which a deep bed filter (21), disposed inside at least one hollow-cylindrical chamber (17), is formed by a bulk material filling of regenerable, filtration-active substances of a particulate and/or fibrous structure. The hollow-cylindrical chamber accommodates radial flow by means of porous inner and outer peripheral walls (18, 19). The deep bed filter can be either washed, or regenerated by flushing back with water, steam or chemical cleansing agents, during which the filtration-active substances remain inside the chamber (17).

Abstract: A filtering system with electrolytic action and method is disclosed which is adapted for filtering the water in swimming pools, spas, saunas, hot tubs, whirlpools and the like. The filtering system includes a pump for drawing water from a body of water and circulating this water through an electrolytic filter including a layer of electrolytic filter media of dissimilar metal particles or granules and returning this filtered water to the body of water. The filtering system not only removes sand and sediment but also prevents algae and fungus growth, kills bacteria, and eliminates the need for adding chlorine, bromine, and algacide to the water. In accordance with a preferred embodiment, the filtering system includes a bypass valve installed downstream of the pump to divert only a selected quantity of water through the electrolytic filter.