Abstract: A kit for increasing the capacity and versatility of an inline dispenser with the kit including a set of stackable dispenser cartridges and an extension for increasing the capacity of the system with the extensions having fasteners thereon for changing the capacity of the system without having to replace existing components of the system.

Abstract: A floating dispenser for floatingly delivering a dispersant or dispersants to a body of water with the floating dispenser floating in an upright condition when a dispersant is present in a dispenser cartridge of the floating dispenser with the dispenser self inverting 180 degrees in response to consumption of the dispersant in the dispenser cartridge to thereby provide a visual alert that one should replace the dispenser cartridge in the dispenser with a fresh dispenser cartridge.

Abstract: Devices for use in the disposal of pharmaceutical compositions are provided. Aspects of the devices include: a support having a surface; an activated carbon layer present on the surface; and an adhesive for stably associating a pharmaceutical composition with the activated carbon layer upon application of the pharmaceutical composition to the activated carbon layer. Also provided are methods of using the devices and kits containing the devices.

Abstract: A method for the evaporative production of phenol-BPA adduct crystals in a crystallizer is provided. First, a supersaturated BPA solution is introduced into a crystallizer that includes a cylindrical vessel and a concentrically-disposed draft tube that defines an annular space between the vessel and tube. Next, the BPA solution is circulated through the draft tube and annular space while a coolant is uniformly distributed in the circulating flow by radially injecting a volatile hydrocarbon compound at between about 30% and 60% of a radial extent of the annular space of to form a BPA mixture. Phenol-BPA adduct crystals are produced in the vessel by evaporating the volatile hydrocarbon compound out of the BPA mixture. The method provides a consistent and uniform concentration of coolant across the surface of the boiling zone that prevents or at least reduces unwanted crystal nucleation.

Abstract: A container for releasing a microbiocide component into a liquid composition susceptible to unwanted microbial growth (LCMG) includes a LCMG impermeable casing separate and apart from an internal combustion engine filter housing, and having a hollow interior and at least one opening. A microbiocide component, for example, at least one LCMG-soluble microbiocide, as the only active material located in the hollow interior. At least one liquid permeable element, for example, a membrane member, is provided at or near an opening in the casing and is effective to provide for release of microbiocide component into the LCMG. Methods of releasing microbiocide component into LCMGs are also provided.

Abstract: An interface is provided for storing microfluidic samples in a nanoliter sample chip. A fluid access structure provides a fluid access region to a selected subset of sample wells from an array of sample wells. A fluid introduction mechanism introduces a sample fluid to the fluid access region so that the sample wells in the selected subset are populated with the sample fluid without the unselected sample wells being populated with the sample fluid.

Abstract: A water treatment feed device includes a hopper and a receptacle. The hopper has a granule-receiving compartment defined by an upper hopper portion and a lower V-shaped hopper portion connected to the upper hopper portion. The lower V-shaped hopper portion is fabricated from a porous material having a plurality of pores sized to at least substantially retain conventional water treatment granules therein. The receptacle has a water-receiving compartment with a weir disposed therein to divide the water-receiving compartment into a water inlet sub-compartment and a water outlet sub-compartment with the water inlet sub-compartment sized to receive the hopper loaded with conventional water treatment granules. A water treatment feed system and a method for dissolving conventional water treatment granules in water are also described.

Abstract: An adjustable device for delivering chemical solutions into a liquid flow, where a saturated chemical solution is created by dissolving solid chemical contained within a chemical dispensing chamber, the device retained within a housing connected into a fluid flow line such that liquid for treatment flows therethrough. The device allows for adjustment or control of the amount of liquid flow into the dispensing chamber, the amount of saturated chemical solution drawn from the dispensing chamber by the main liquid flow, and the amount of main liquid flow through the device.

Abstract: A chemical release system. Implementations may utilize implementations of a first cartridge that include a body coupled with a cartridge head at a first end and coupled with an end plug at a second end where the cartridge head includes a through hole configured to engage with an annular flange in a main head. The body may have an internal cross section. The first cartridge may also include a flow restrictor plate disposed within the body between the first end and the second end where the flow restrictor plate is oriented substantially parallel to the cartridge head within the body, includes only one opening therethrough, and substantially conforms with the internal cross section of the body. The body may include one or more through holes in a side of the body located between the flow restrictor plate and the cartridge head.

Abstract: A chemical dispensing assembly having a base member, a flow chamber, a chemical chamber and a dispensing control conduit, wherein water or other liquid flows through the base member, into the flow chamber, through the dispensing control conduit and out the base member, wherein a small amount of saturated solution retained within the chemical chamber is drawn into the water flow, the chemical chamber being connected below the flow chamber and the volume of the chemical chamber being greater than the volume of the flow chamber. Preferably, the flow chamber is connected to the base member with a bayonet-type connection mechanism, and keys and key slots are provided such that only dedicated flow chambers can be connected to the base member.

Abstract: A crystallizer for the evaporative production of phenol-BPA adduct crystals is provided that achieves more uniform crystal growth while suppressing undesired crystal nucleation. The crystallizer includes a cylindrical vessel; a draft tube concentrically disposed within the cylindrical vessel such that an annular space is defined between the vessel and tube; an impeller that circulates liquid in the vessel through the draft tube and the annular space, and a plurality of nozzles mounted around an inner wall of said cylindrical vessel that introduce an evaporative coolant into the vessel. Each of the nozzles includes a discharge end disposed between about 30% and 60% of a radial extent of the annular space, and is located below an upper end of the draft tube a distance of between about 50% to 150% of the diameter of the vessel. Such a nozzle arrangement provides a consistent and uniform concentration of coolant across the surface of the boiling zone that prevents or at least reduces unwanted crystal nucleation.

Abstract: A chemical dispensing device for delivering chemical solutions into a liquid flow, alone or in combination with a filter cartridge, wherein said chemical solution is created by dissolving solid chemical contained within a chemical cartridge, the device having an upper conduit member with a sealing flange, flow openings, an internal wall and a dispensing aperture, and a chemical containing lower cartridge, the cartridge having an intake aperture located on the upper portion of its side wall, such that a saturated chemical solution is formed in the cartridge and passes into liquid flowing through the upper conduit member through the dispensing aperture due to the pressure differential of the liquid flowing into through the flow openings of the upper conduit.

Abstract: A device for providing a relatively constant rate of dissolution of a solid article (2) within it has one or more opening (22) to allow the passage of water. There is a flow pathway between said one or more openings and the solid article, which flow pathway is obturated by a water-permeable packing (26), through which water must pass, in entering or leaving the device.

Abstract: Disclosed are apparatus for delivery of a gas, e.g., carbon dioxide and/or chlorine dioxide, and methods of its use and manufacture. The apparatus includes a sachet constructed in part with a hydrophobic material. The sachet contains one or more reactants that generate a gas in the presence of an initiating agent, e.g., water. The apparatus can also include a barrier layer and/or a rigid frame. In another embodiment, the apparatus is combined with a reservoir that can be used to deliver a gas to the reservoir and, optionally, a conduit. In another embodiment, the apparatus is incorporated into a fluid dispersion system that includes a dispersion apparatus, e.g., a humidifier.

Abstract: An apparatus and process as a system for extraction of constituents from alternative medicinal material is provided. The apparatus includes an outer container containing a solvent liquid, an inner container mounted within the outer container containing an alternative medicinal material, a microwave generator for supplying microwaves to the solvent liquid and the alternative medicinal material, and a motor for rotating the inner container within the outer container. The inner container includes a perforated wall, such that the alternative medicinal material in the inner container can be fully or partially immersed in the solvent liquid.

Abstract: The invention provides a device for use in a cartridge for on-line preparation of a solution for a medical procedure. The device comprises a hollow body, the body having a first end and a second end and is provided with through holes in its wall. The second end is closed, while the first end is open and adapted for receiving fluid introduced into the cartridge. The fluid leaves the device through said holes. Furthermore, the invention relates to a cartridge provided with such a device, a method of manufacturing such a cartridge and the use of a charge of concentrate in such a cartridge.

Abstract: A multi-function chlorine dispenser performs several functions at once. The functions include dispensing chlorine, lighting up the pool at night and displaying water temperature. A further function of displaying time can also be included.

Abstract: A device for use in water comprising a carrier having an interior cavity and one or more openings allowing ingress to and egress from the interior cavity; and a moss contained within the interior cavity in which the carrier completely encloses the moss.

Abstract: A corrosion inhibitor dispensing apparatus has a housing with a fluid inlet and a fluid outlet. A first body within the housing comprises a cathodic corrosion inhibitor. A second body within the housing comprises an anodic corrosion inhibitor.

Abstract: An adjustable device for delivering chemical solutions into a liquid flow, where a saturated chemical solution is created by dissolving solid chemical contained within a chemical dispensing chamber, the device retained within a housing connected into a fluid flow line such that liquid for treatment flows therethrough. The device allows for adjustment or control of the amount of liquid flow into the dispensing chamber, the amount of saturated chemical solution drawn from the dispensing chamber by the main liquid flow, and the amount of main liquid flow through the device.

Abstract: A two part biocide composition containing metal ions and bromine donor for killing microorganisms in a body of water and a method of killing microorganisms in a body of water by placing both metal ions and a bromine in the body of water to allow use of lower concentrations of bromine than if bromine were used alone as a biocide.

Abstract: A cartridge holder and a floating dispenser system for dispensing materials into a fluid with the floating dispenser system including a cartridge holder with receptacles for removably attaching or detaching at least two cartridge dispensers therein to allow one to simultaneously dispense materials into a fluid system by placing the floating dispensing system in a body of fluids and to replenish the system by merely removing and replacing a cartridge in the holder.

Abstract: A feeder device for introducing treatment chemicals into a recirculating water stream from a swimming pool. The feeder device includes a housing having a top and bottom portions. A funnel-like hopper having sidewalls and an open bottom forms the inside of the top portion. A grid at least partially closes the open bottom of the hopper. The grid includes a top surface and a bottom surface. One or more chemicals such as chlorine are contained within the sidewalls of the hopper and supported by the top surface of the grid. A dissolving cup having a bottom surface and sidewalls is positioned within the bottom portion. The sidewalls include an opening or notch of a predetermined cross-sectional area formed therein. The bottom surface includes a center nozzle oriented vertically toward the bottom surface of the grid and an off-center nozzle adapted to direct the fluid horizontally in the dissolving cup.

Abstract: A disposable filter cartridge for a pump-filter assembly having a one piece integral pump-filter housing. The filter cartridge includes opposed upper and lower end caps and a tubular skeletal core member open at both ends. A pleated filter medium surrounds the core member and is supported and retained between the opposed end caps. The end caps further include integral flexible gaskets dimensioned to engage pipe fittings of more than one size. A water treatment medium may be deposited within a central portion of the core member. In combination with the skeletal core, a platform means projects radially inwardly from the central core to form a cage-like structure adapted to support a variety of water treatment media. The entire filter cartridge is removable from the housing and may be replaced as desired.

Abstract: A device for delivering chemical solutions into a liquid flow, where the chemical solution is created by dissolving solid chemical contained within a chemical dispenser cartridge, the dispenser cartridge having an intake aperture located on the upper portion of its side wall and a dispensing aperture on its removable cap member, such that a saturated chemical solution is formed in the cartridge and passes into the liquid flow through the dispensing aperture due to the pressure differential of the liquid flowing through a tubular filter, the dispenser cartridge being mounted within the tubular filter.

Abstract: A single-use cartridge C contains a dose of a concentrated decontaminant for providing a decontaminant solution upon mixing with water. The cartridge is inserted into the well (16) of a decontamination system (A). Fresh water and then the decontaminant solution are recirculated through the well during a decontamination cycle. The cartridge includes a porous region (42), through which the decontaminant solution flows. Impregnated in the porous region is a chemical indicator (44), such as crystal violet, which gradually changes color on exposure to the decontaminant. The indicator provides a semi-quantitative indication of the integrated level of the decontaminant in the solution over time for determining whether an acceptable level of the decontaminant was present for decontamination. A preferred embodiment of the cartridge C includes nested inner and outer water-penetrable cups (50,150,70,170) for holding first and second reagents. The two cups are sealed together adjacent upper open ends (56,92,156,192).

Abstract: A device and method for dispensing chemical agents into a body of water includes a plastic, Bucket-like container having the chemical agents disposed therein. The side walls of the container are perforated with a plurality of perforations. Wrapped around the outside walls of the container is a removable cover layer disposed over the perforations. Disposed within the container is a layer of closed cell foam to provide the container with sufficient buoyancy to float at the surface of a body of water. The device is especially useful in the neutralization of pH within a lake or pond.

Abstract: A device and method for dispensing chemical agents into a body of water includes a plastic, Bucket-like container having the chemical agents disposed therein. The side walls of the container are perforated with a plurality of perforations. Wrapped around the outside walls of the container is a removable cover layer disposed over the perforations. Disposed within the container is a layer of closed cell foam to provide the container with sufficient buoyancy to float at the surface of a body of water. The device is especially useful in the neutralization of pH within a lake or pond.

Abstract: A recycling system melts unused portions of soap in order to improve the efficiency of the soaking procedure. A chamber has a pump and a screen that holds the soap disposed therein, while a tube member connects to the chamber. One or two conduits are fluid flow connected to the outlet port of the pump and each have one or more jets that protrude through the tube member. Soap is placed onto the screen and water is drawn into the chamber by the pump. The inlet pattern of the pump creates a flow of water that flows over the soap on the screen, with the soap laden water being pumped through the conduits and discharged into the sink by the jets. Now that the soap has melted into soap laden water, pieces and bits of soap will not stick to the fabric at the conclusion of the soak wash period. A fluid level switch deactivates the pump if the water within the sink falls below a certain level.

Abstract: Describes a chemical feeder that supplies treating agents, e.g., calcium hypochlorite, to a liquid stream, e.g., an aqueous stream. The chemical feeder is operated in a substantially flooded condition to provide a useful and safe pressure feeder, and optionally uses cyclonic flow to be relatively self-cleaning. One or more tablet canisters are utilized within the substantially flooded interior of the chemical feeder, and expose the lowermost tablets to the turbulent flow outside of the tablet canister. A substantially uniform chemical distribution rate over tablet life is provided by the chemical feeder.

Abstract: A system for automatic control of dissolution rates of chemical tablets for water purification for constant flow rate systems. The system includes a treating unit which does not depend upon variable flow rates of water to obtain predetermined variable concentrations of purifying chemical solution. The system includes sensors and a computer for generating control signals to the treating unit for automatically varying the chemical dissolution rate.

Abstract: A device for dispensing chemical agents into a body of water includes a plastic, bucket-like container having the chemical agents disposed therein. The side walls of the container are perforated with a plurality of perforations. Wrapped around the outside walls of the container is a removable cover layer disposed over the perforations. Disposed within the container is a layer of closed cell foam to provide the container with sufficient buoyancy to float at the surface of a body of water. The device is especially useful in the fertilization of algae growth within a lake or pond.

Abstract: A buoyant dispensing device for dispensing a material into a body of water. An inner receptacle contains the material and has apertures to permit the material to escape therefrom. A housing having an outer receptacle houses the inner receptacle therein and has corresponding apertures. The inner and outer receptacles are rotatable and fixable with respect to one another to enable a varying degree of overlap between the apertures to control the amount of material dispensed therethrough. Vanes circumscribe the receptacles and corresponding spokes and guard rings interconnect the receptacles and the vanes and keep the receptacles spaced a predetermined distance from other objects. The vanes absorb an impulse force from the body of water and impart the impulse force to the receptacles in the form of a rotational reaction force whereby the dispensing device rotationally and linearly displaces itself within the body of water.

Abstract: Apparatus and method for dissolving chemical tablets for creating a variable rate of chemical dissolution in a stream of constant flow rate of untreated liquid, especially water. The apparatus includes a housing in which a container is placed. The container includes a sieve plate or perforated grid which separates the container into an upper chamber in which chemical tablets are stored and a lower mixing chamber. A collection reservoir is defined in an annular outside the container wall and inside of the housing. Several arrangements are illustrated by which a vortex of liquid is generated of controllable variable intensity in the lower or mixing chamber thereby creating uneven liquid pressure beneath the perforated grid as a function of radial distance. As a result, fluid passes aggressively through outer radial perforations or holes in the grid and which impinge on the chemical tablets stacked on the grid.

Abstract: A liquid purification apparatus having a main body having means to allow liquid to enter the main body is disclosed. An exit means allows exit of liquid from the main body. A solid compound is located within the main body for dissolution by the liquid. Means cooperating with the solid compound expose a substantially consistent surface area of the compound to the liquid.

Abstract: A chlorinator for aerobic waste treatment systems that is in functional attachment with a waste stream and that includes a plurality of chlorine tablets therein. The chlorinator includes a cylinder portion that has a plurality of openings therethrough providing fluid communication between the waste stream and the plurality of chlorine tablets so that the waste stream comes into contact with all surfaces of at least one of the chlorine tablets. The chlorinator includes a cylinder portion adapted to hold the chlorine tablets therein, the cylinder portion having a plurality of openings providing fluid communication between the waste stream and chlorine tablets and a cylinder floor. The cylinder floor includes a floor aperture. In one embodiment there is a support disk hinged and oriented over the floor aperture so as to cover the floor aperture and a device to sense the presence of chlorine tablets within the cylinder portion.

Abstract: A dispense device includes a dispense head and threaded canister. A chemical container assembly disposed within the canister includes a support tube which telescopically receives a chemical container. The chemical container includes inlet and outlet holes to allow a flow through the container to come into contact and subsequently dissolve chemical treatment material disposed within the container. The support tube engages the dispense head to aid in defining the separation distance between the dispense head and the outlet hole of the chemical container. A chemical sleeve disposed about the support column treats fluid passing through said chemical container.

Abstract: A dispense device includes a dispense head and threaded canister. A chemical container assembly disposed within the canister includes a support column which telescopically receives a chemical container. The chemical container includes inlet and outlet holes to allow a flow through the container to come into contact and subsequently dissolve chemical treatment material disposed within the container. The support column engages the dispense head to aid in defining the separation distance between the dispense head and the outlet hole of the chemical container.

Abstract: A chemical feeder that produces a solution of a chemical treating agent, e.g., calcium hypochlorite, is described. The chemical feeder comprises a housing (22) having a base (36), side wall (20) extending upwardly from the base, and a closed upper end (28), all of which define a cavity (2). An elongated substantially vertical hollow container (10) is centrally located within the cavity. The bottom of the side wall (12) of the container is adjacent to the base, and contains a plurality of perforations 14 in the lower portion of the side wall, which is spaced from the inside side wall of the housing. At least one hollow canister (40) having a plurality of perforations (47, 49) in its base and the lower portion of its side wall is interposed, e.g., slidably received, within the container.

Abstract: A device for delivering chemical solutions into a liquid flow within a chemical dispensing unit, where said chemical solution is created by dissolving solid chemical contained within a chemical cartridge, the unit having a base member and housing connected into a fluid flow line such that liquid flows into the base member, into the housing and back out through the base member or through the top of the housing, the chemical dispenser device having an upper conduit member, an apertured midsection, a chemical containing lower cartridge and a coaxial tube extending through the cartridge, the cartridge having an intake aperture located on the upper portion of its side wall and a dispensing aperture on its top, such that a saturated chemical solution is formed in said cartridge and passes into the liquid flow through the dispensing aperture due to the pressure differential of the liquid flowing into the apertured midsection and out through either the upper conduit or through the coaxial conduit.

Abstract: A device for delivering chemical solutions into a liquid flow, where said chemical solution is created by dissolving solid chemical contained within a chemical cartridge, the device having a uni-directional flow housing connected into a fluid flow line, and further having a chemical dispenser having an upper conduit member, an apertured midsection and a chemical containing lower cartridge, the cartridge having an intake aperture located on the upper portion of its side wall and a dispensing aperture on its top, such that a saturated chemical solution is formed in said cartridge and passes into the liquid flow through the dispensing aperture due to the pressure differential of the liquid flowing into the apertured midsection and through the upper conduit out of the device.

Abstract: A contaminated water disinfectant and method including a quantity of substantially dry soluble alkali metal ferrate (VI) particles. A porous sealed packet contains the particles in a quantity sufficient to disinfect a predetermined quantity of contaminated water by oxygenation. A quantity of substantially dry insoluble inert particles are also contained within said packet and are of sufficient weight to cause the packet to at least partially sink into the contaminated water. The packet is formed of a porous sheet material capable of passing oxygen and water therethrough while preventing undissolved ferrate and inert particles from passing from the packet and entering the water.

Abstract: A door (18) for sealing the opening (14) to a walk-in steam sterilizer is formed from a stainless steel plate (50), sized to cover the opening, and a load-bearing framework (52), which is formed from a material having a different coefficient of thermal expansion to that of the plate, such as carbon steel. The framework includes a set of horizontally-spaced I beams (60) which are connected together at their ends by an outer frame (64). The framework is flexibly connected to an exterior surface of the plate by a number of flexible joints (56), such as carbon steel straps. The straps are welded at either end to the plate to form loops. The I beams are supported in the loops. As the temperature inside the sterilizer changes, causing the components of the door to expand or contract, the framework and the plate are able to expand or contract at different rates without resulting in bowing or other distortion of the door. Sets of rollers (22, 24) are rotatably mounted to upper and lower ends of the outer frame.

Abstract: An electroplating machine is disclosed as including an electrode positioning apparatus, an electrolyte delivery apparatus, an apparatus for covering a roller, an apparatus for dissolving copper oxide powder in an electrolyte passing through the apparatus, and an apparatus allowing the variation of the distance between two rollers. The electrode positioning apparatus has a first open end and a second end joined by two sets of connecting members, in which the connecting members in each set are parallel to one another and equally spaced from the adjacent member. The electrolyte delivery apparatus includes a pipe connected to a source of electrolyte and a nozzle through which the electrolyte is deliverable to an electrode mounted on the electrode positioning apparatus. The covering apparatus is elongate in shape and includes a cavity for accommodating a majority part of the outside surface of a roller.

Abstract: A water treatment kit includes a package; a housing stored within the package, the housing having a first water treatment chemical therein and a plurality of holes defined in an outer wall portion thereof for dispensing the first water treatment chemical into water; and at least one chemical dosage stored within the package independent of the housing, the chemical dosage comprising a second water treatment chemical; the first water treatment chemical of the housing and the second water treatment chemical of the chemical dosage being dispensed within the water at respective controlled rates to treat the water. The first water treatment chemical includes copper sulfate and a copper ionizable grid and the at least one chemical dosage includes sodium or potassium monopersulfate. The package includes a handle formed in an upper portion thereof to facilitate easy handling of the kit, and two molded half sections which are joined by a living hinge.

Abstract: A chlorinator for aerobic waste treatment systems that is in functional attachment with a waste stream and that includes a plurality of chlorine tablets therein. The chlorinator includes a cylinder portion that has a plurality of openings therethrough providing fluid communication between the waste stream and the plurality of chlorine tablets so that the waste stream comes into contact with all surfaces of at least one of the chlorine tablets. The cylinder portion of the chlorinator also includes an inner surface which has a coating that is non-reactive with the chlorine tablets and that enables the chlorine tablets to slide thereon. The waste stream comprises septic wastewater, which originates from toilet systems, and grey wastewater, which originates from somewhere other than toilet systems. The chlorinator also includes a device for selectively treating the septic wastewater with the chlorine tablets and not treating the grey wastewater with the chlorine tablets.

Abstract: A low/intermediate/high flow tablet feeder is provided for the controlled dissolution of a solid treating agent in flowing liquid, such as water or wastewater. The tablet feeder includes a bottom wall which is contoured to define first, second and third fluid flow paths which are operative at low, intermediate and high volume/height fluid flow. An adjustable sluice is provided adjacent a downstream outlet of a chamber defined by the tablet feeder, and a sectional riser can be associated with the tablet feeder for extended or below grade installations.

Abstract: A liquid permeable dispensing device adapted to retain a detergent tablet in a dish washing machine is provided. The dispensing device includes a hollow body having an opening for receiving a tablet, a base opposite the opening, and a liquid permeable side wall. A hook extends along at least a portion of the side wall for attaching the hollow body to the interior of a dish washing machine, wherein the hook has a free end disposed adjacent the base. A clip having a free end disposed adjacent to or above the free end of the hook prevents upward movement of the hollow body during use in the dish washing machine. The clip is adapted to engage a perforation of a cutlery basket in a dish washing machine while the hook is adapted to engage an exterior wall of a cutlery basket.

Abstract: The present invention comprises devices and methods for treating a standing water system comprising devices for the administration to the standing water system an admixture comprising calcium hypochlorite and borate salts and acids through a perforated distribution device. The method of treating a standing water system more efficiently provides free chlorine to the system, stabilizes the pH of the standing water system, and reduces the undesired side effects of the addition of calcium hypochlorite alone.

Abstract: A dual chemical feeder device treats a fluid simultaneously with two different chemical compositions which may not be wholly compatible. In an exemplary embodiment for application in swimming pools, hot tubs, spas and the like, a chlorinator is combined with a sanitizing canister in a chlorinator/sanitizer to chemically treat the full flow of water through the apparatus with a chlorine-based chemical composition and another chemical composition. In alternate embodiments, the chlorinator/sanitizer is configured as a parallel treatment unit and as a series treatment unit. In the series treatment unit, the full flow through the chlorinator also flows through the sanitizing media in the santizing canister, so that all the water is both chlorinated and sanitized by the chlorinator/sanitizer. In the parallel treatment unit, the flow within the unit is divided into two streams which are separately treated.