Abstract: Systems and methods for versatile water purification are provided. A system according to the invention may include a first delivery pump. The first delivery pump may maintain a flow of water into a multi media filter. The multi media filter preferably filters the pumped water. The filtered water may then be pumped by a reverse osmosis pump through a plurality of reverse osmosis columns to produce an osmosis water having less particulate matter than the filtered water. The osmosis water may then be passed to a buffer tank. A second delivery pump for pumping water from the buffer tank may also be used. An ozone system for injecting ozone into water pumped by the second delivery pump may be also implemented. A first output path from the ozone system may pass the ozonated water from the ozone system to the buffer tank via a first valve. A second output path from the ozone system may also be implemented.

Abstract: A fluidic system has a flow source adapted for delivering a fluid, a plurality of flow channels, each being adapted for providing a fluid separation and being arranged downstream of the flow source, a flow meter adapted for determining a fluid flow in at least one of the flow channels and being arranged downstream of the at least one of the flow channels, and a control unit adapted for controlling the fluid flow in the at least one of the flow channels in response to the determined fluid flow.

Abstract: This disclosure generally relates to dialysis systems and related methods. In one aspect of the invention, a dialysis system includes a device configured so that a medical fluid can pass therethrough, and the device is adapted to remove one or more substances from the medical fluid as the medical fluid passes through the device. The dialysis system can also include a sodium control system adapted to alter a sodium concentration of the medical fluid.

Abstract: An object of this invention is to provide an improved stormwater diversion device that offers a more precise, easy to install and accurate means for diverting stormwater flow than any of the aforementioned prior art techniques. Referring now to the drawings, a flow rate gauge (1) is displayed on top of the apparatus clearly allows the installer to easily calibrate the device's potential flow rate to fit any particular need/situation without having to change the dimension of the box itself. Quite simply, after the device is fitted to the storm sewer structure, and the structure (e.g. inlet box) is installed in the field; the installer is merely required to use a lug wrench to either accommodate more flow, by turning the adjustment nut (2) counter-clockwise resulting in the movement (opening) of the gate (3) along the track (4) or reduce the allowed flow rate, by turning clockwise resulting in the movement (closure) of the gate (3) along the track (4).

Abstract: A precision flow controller is capable of providing a flow rate less than 100 microliters/minute and varying the flow rate in a prescribed manner that is both predictable and reproducible where the accuracy and precision of the flowrate is less than 5% of the flow rate. A plurality of variable pressure fluid supplies pump fluid through a single outlet. Flowmeters measure the flow rates and a controller compares the flow rates to desired flowrates and, if necessary, adjusts the plurality of variable pressure fluid supplies so that the variable pressure fluid supplies pump fluid at the desired flow rate. The variable pressure fluid supplies can be pneumatically driven.

Abstract: A communication system for a water softener system that includes a controller configured for communicating with the water softener assembly and a remote display configured for sending and receiving at least one signal to and from the controller to a remote location.

Abstract: A sensor assembly for a water softening system and includes a first treatment tank having a first valve assembly, a first flow meter and a sensor probe, a second treatment tank having a second valve assembly and a second flow meter and a brine tank independently connected to each of the first treatment tank and the second treatment tank. A controller is configured for communicating with the sensor probe and the first flow meter in the first treatment tank, and the second flow meter in the second treatment tank.

Abstract: The invention is directed to a wastewater treatment system having an anoxic biological treatment zone, an aerobic biological treatment zone and a separator. The concentration of oxygen in streams within the system is strategically managed for improved removal of nutrient from the wastewater. A source of biodegradable carbon may be introduced to reduce the concentration of oxygen within the system. An effective treatment time under anoxic or aerobic conditions may further be varied.

Abstract: A water treatment system (“WTS”) includes a prefilter, a carbon block filter and a microbiological interception (“MI”) filter that operate in combination to treat a fluid stream, such as water. The WTS may include two prefilters, for example, both a multi-layer nonwoven prefilter and a pleated fabric prefilter. The MI filter may include carbon particles and a binder, and the carbon particles may have a mean particle diameter ranging from about 60 microns to about 80 microns and with a particle size distribution in which no more than about 10% by weight of the particles are larger than about 140 mesh and no more than about 10% by weight are smaller than about 500 mesh. In one embodiment, the water treatment system further includes a volumetric end-of-life filter monitor that monitors the life of the MI filter.

Abstract: A vaporization apparatus and related vaporization method is provided that relies on thermocapillary convection. The apparatus consists of a thermocapillary evaporator that has three sections: an evaporation section, a displacement section, and a storage system for storing the liquid to be evaporated. The evaporation section is operable to distribute thermal energy substantially along the entire liquid-gas interface. The method of the present invention consists of providing a thermocapillary evaporator that includes a storage system for the liquid to be evaporated. Advantageously, the present invention provides substantial evaporation from relatively low temperature heat sources, compared to conventional evaporators.

Abstract: An infusion pump and method are provided which control flow rates with variable fluid pressure and variable series flow resistance.

Abstract: Systems and methods are provided for the removal and disposal of arsenic from an aqueous medium. The systems and methods include the removal of arsenic from a source by contact with either a chemically treated natural or synthetic zeolite, for example a ferric-loaded zeolite. The spent zeolite is disposed of at an appropriate arsenic disposal site. A system for monitoring and maintaining an arsenic removal/disposal system by an off-site provider is also disclosed.

Abstract: An apparatus for purifying a liquid including: reaction chambers that utilizes an ionization reaction material in turbulence with the liquid, a first fine collective filtration unit, a first laser photolytic light chamber that utilizes ultraviolet light in the 100 to 300 nanometer range to irradiate liquid, a second ultra-fine collective filtration unit, and a pharmaceutical grade granular activated carbon filter unit.

Abstract: A water softening device comprises a salt chamber, a metering chamber, and a softening chamber. The salt chamber holds salt, while the metering chamber holds brine. The softening chamber holds water softening material, such as zeolite beads. An input is in fluid communication with the salt chamber for producing brine. The input may be coupled with a shower outlet or other structure. An output is in fluid communication with the softening chamber to communicate softened water from the system through a shower head or other device. The salt chamber and metering chamber may be positioned such that the salt chamber communicates brine upwardly into the metering chamber against the influence of gravity. The salt chamber may be positioned lateral to the softening chamber. The metering chamber may be substantially fluidly isolated from the softening chamber as water is communicated from the input to the softening chamber.

Abstract: Concentrator systems include a circulating fluid pathway passing through a pump, a filter, and a retentate container. An effluent outlet line communicates with the circulating fluid pathway through a filtering element within a body of the filter. The systems further include a control system. In some embodiments, the pump, filter, and retentate container may be secured within a portable container. Methods for concentrating a foreign substance within a fluid sample include establishing circulation of fluid through a fluid circulation path passing through a fluid pump, a filter body, and a retentate container. Fluid is caused to exit the fluid circulation path through a filtering element within the filter body, and at least one foreign substance is prevented from passing through the filtering element. A control system may be used to control at least one of a speed of the pump and a quantity of retentate within the retentate container.

Abstract: A flow-through mixing apparatus for incorporating a dry treatment product into a waste stream. The apparatus comprises a pump for directing a liquid waste from a storage pit/tank, a mixer that receives the liquid waste from the pump, and a valve downstream of the mixer for either recirculating the liquid waste back to the storage pit/tank via a recirculation conduit, or directing the liquid waste to a discharge conduit. The mixer comprising a jet nozzle, a venturi tube and a high-shear assembly. The recirculation conduit establishes a calibration loop for determining the appropriate treatment regimen based on the characteristics of the waste liquid. The recirculation conduit also permits the homogenization of the pit/tank contents prior to addition of the dry treatment product. The dry treatment product introduced in the region of the mixer is subjected high shear forces, thereby incorporating the dry treatment product into the waste stream with increased dispersion and reduced agglomeration.

Abstract: The invention concerns a plant comprising, on a vertical axis, a homogenizing vessel (1) followed by a settling vessel (2) and a flocculating vat (3). The homogenizing vessel (1) is fed by tangential intake (92) of the effluent and the input (611) and the output (612) of the upper tube (61) comprise a helical guide (613, 614) for driving the effluent in rotation. The lower tube (62) of larger diameter than that of the upper tube (61) is terminated by an outlet in the form of an upside-down cone (622) with reduced cross-section (621). The lower portion (31) of the flocculation vat (3) is truncated, with an apex angle, smaller than that of the upper portion (32), said lower portion being parallel to the cone of the outlet of the lower tube (62), and anti-backflow cones (7, 8) surround the conduit (6) in the settling vessel (2).

Abstract: An extracted liquid automatic collecting equipment includes an automatic control device, an input container, a reaction column, a pump electrically connected to the automatic control device, an automatic rolling device electrically connected to the automatic control device, a plurality of collecting devices, a plurality of connecting tubes disposed between the collecting devices and the automatic rolling device. The pump is connected to the input container and the reaction column. The automatic rolling device is connected to the reaction column. The connecting tubes connect the collecting devices to the automatic rolling device.

Abstract: The invention relates to a method and corresponding plant for the hygienic operation of an ion exchanger, in particular, in water treatment, whereby the ion exchanger is regenerated by a regenerating agent solution during a regeneration phase. According to the invention, a simultaneous disinfection effect may be achieved, whereby chlorine dioxide is generated in situ in the regenerating agent solution and run through the ion exchanger.

Abstract: The invention relates to a device for purifying water, in particular for the continuous purification of water in the paper industry, said device comprising at least one supply line and at least one drain line for the water. The device also comprises a compression device for at least one sub-stream of the water, an injection device for injecting at least one gas and an expansion device for expanding at least one sub-stream of the water. In addition, the device comprises a unit for separating different phases of the water for purification. The device is characterized by a control system, which detects at least one parameter of the water and controls at least the addition of at least one additive in accordance with the process parameter.

Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.

Abstract: The invention is directed to a system for removing waste material from a fluid flowing in a channel. This system may incorporate the use of a trap for collecting the waste material while allowing the fluid to pass; a rake for removing the waste material away from the trap; a drive assembly for moving the rake to remove the waste material; a prime mover for operating the drive assembly; and a variable speed controller configured for operating the prime mover over a variable range of speeds.

Abstract: This invention provides a method and apparatus for a hemodiafiltration delivery module that is used in conjunction with a UF controlled dialysis machine to enable hemodiafiltration therapy to be performed. The advantage is that one can fully utilize a current functioning dialysis machine to perform a hemodiafiltration therapy as opposed to purchasing a completely new machine that offers this capability.

Abstract: A fuel recirculation and cleaning assembly comprising a planar surfaced support base, an upright support secured to the support base and a flange extending from support base to form an enclosed area around the planar surface. A filter assembly for separating water from fuel and trapping particulate matter is mounted to the upright support and a discharge pump is fluidly connected to the filter assembly discharge water separated from the fuel by the filter assembly to a water storage tank. A magnetic microbial decontamination device is secured to the upright support and fluidly connected to the filter assembly by a conduit to receive filtered fuel from an outlet of the filter assembly and pass the fuel through a magnetic field which destroys microbial residues in the fuel. A circulation pump is mounted on the support base and is fluidly connected to an outlet of said microbial decontamination device by conduit means to discharge treated fuel to a fuel storage tank.

Abstract: A water monitoring and regulation apparatus comprising two vanes connected to two flow meters, a timer, a main gear connected to the two vane shafts, a timer gear connected to the timer, a shut off mechanism, a manual reset and an automatic reset when the shut off has not been engaged. The flow of water through the vanes causes the main gear to turn which causes the timer gear to turn. When the timer gear has turned the number of revolutions corresponding to the pre-selected maximum flow time, the timer will shut off the flow of water. When the water flow is interrupted, as in normal use of the water supply, the time will be automatically reset by the reset mechanism.

Abstract: An extracorporeal blood processing system is disclosed which includes a variety of novel components and which may be operated in accordance with a variety of novel methodologies. For instance, the system includes a graphical operator interface which directs the operator through various aspects of the apheresis procedure. Moreover, the system also includes a variety of features relating to loading a blood processing vessel into a blood processing channel and removing the same after completion of the procedure. Furthermore, the system also includes a variety of features relating to utilizing a blood priming of at least portions of the apheresis system in preparation for the procedure. In addition, the system includes a variety of features enhancing the performance of the apheresis system, including the interrelationship between the blood processing vessel and the blood processing vessel and the utilization of high packing factors for the procedure.

Abstract: A water filtering system for a refrigerator determines a need for a filter change by timing the period of actuation of at least one valve used to regulate the flow of filtered water to both a water dispenser and an ice maker. Based on a known flow rate, a volume of filtered water associated with the duration of valve actuation is calculated. A summing device determines an accumulated, filtered water volume. When the accumulated, filtered water volume reaches or exceeds a threshold value, an indicator is used to signal that the water filter needs to be replaced. As water filtering system of the invention is capable of being operated without a water filter in place, a switch assembly is incorporated to sense the presence of the water filter and the system only senses the valve actuation time when the filter is in place. In addition, provisions are made to reset the accumulated, filtered water volume upon replacement of the water filter.

Abstract: A water treatment device wherein the water during treating is brought into contact with a treatment medium (29), whereby this treatment medium (29), either by means of a regeneration medium (42) or not, is regenerated regularly and whereby, a regulator (59) is used which is provided, with a hydraulically driven first monitoring mechanism (24) with which the water consumption can be controlled and the start of the regeneration cycle can be ordered, and with a hydraulically driven second monitoring mechanism (25) with which the regeneration cycle is controlled and characterized in that both monitoring mechanisms (24-25) are driven by means of the same volumeter (23).

Abstract: A water filter system having a housing for a plurality of serial-flow connected filter cartridges with distinct filtering characteristic related to the direction of flow of water being filtered. Each filter cartridge has a membrane wrapped activated carbon filter body. One of the filter bodies includes a heavy metal bacteriostat. The cartridges are each releasably retained in a manifold by keyed connectors including rotatable locking rings. Each cartridge having a distinct filtering characteristic includes a keying structure to ensure that the cartridge can only be connected to the manifold for placement in proper serial-flow relationship in the system. The filter system includes a spent filter cartridge indicator. The filter system is particularly suited for countertop placement and connection to a faucet.

Abstract: A faucet-mounted water treatment device including a flow totalizer and an end-of-life indicator cooperating with the totalizer to tell the user when it is necessary to replace the filter cartridge. End-of-life indication is provided by a valve which stops flow after a predetermined volume has been filtered and by a rotating screen which shows the amount of useful life remaining in the filter cartridge.

Abstract: A water treatment system having dosing control for providing treated water having very low organic and ionic contamination, that can be accurately dispensed. The water treatment system having dosing control includes a water inlet hydraulically connected to a pump having a variable speed motor. At least one water treatment device is hydraulically connected downstream of the pump, at least one outlet valve is hydraulically connected downstream of the water treatment unit, and a recirculation line is hydraulically connected from the outlet valve to the pump. The output of the pump is controlled by a regulating device connected to the variable speed motor. The system provides for lower electrical current usage and reduced acoustical disturbances.

Abstract: A system for controlling effluent discharge having an inlet for passing wastewater, a filter connected to the inlet for removing solids from the wastewater, a filtered water retaining tank connected to the outlet of the filter for accumulating a portion of the water passed from the filter, a filtered water outlet connected to the outlet of the filter so as to pass filtered water exterior of the system, and a controller connected to the filtered water retaining tank so as to selectively pass a flow of the accumulated water into the filter. The filter includes a first body portion connected to the inlet, a second body portion connected to the first body portion, a filter screen disposed in the second body portion between the first body portion and the outlet and having a plurality of openings therein, and a particulate filter material filling an area between the second body portion and the filter screen.

Abstract: Apparatus is provided for use as an in-line fluid flow monitor through filter media of a variety typically employed in domestic applications upstream of a kitchen faucet as well as unusually low pressure water supplies. Apparatus includes an outer housing with an input port leading to a rotatable turbine within the housing. The turbine, rotatable about a longitudinal axis, is coupled to an offset gear which, in turn, is coupled to a reduction gear train which includes first and second gear arrays mounted for rotation about a first and second axis located parallel with and spaced from the longitudinal axis. Fluid communication is provided from the turbine chamber through the gear train to an output port. The gear train ends in an output which is engaged in driving relationship with an oppositely disposed rotatable valve member having resilient pawl legs extending therefrom. The pawls are configured to engage the output to provide rotatable ratcheting movement.

Abstract: A water treatment device including an arrangement having mechanisms for mechanically totaling the volume of water filtered and for indicating when the replaceable filter cartridge has reached the end of its useful life. End-of-life indication is provided by a valve mechanism for stopping flow after a predetermined volume has been filtered. The arrangement includes a novel mechanism for resetting the flow totalization mechanism. The preferred water treatment device is faucet mounted and also includes a novel flow bypass design.

Abstract: A water filter cartridge including an outer shell, an inlet opening proximate a first end, an outlet opening and a cam extending axially from the first end. Cam is constructed and arranged so as to reset a mechanical flow totalization mechanism in a water treatment device. A channel and notch in the first end of the cartridge provide fluid communication to a chamber of a water treatment device.

Abstract: In a dialysis apparatus having a dialyzer and a single balance chamber, the internal volume of the balance chamber is preferably at most 2/3 of the volume of the dialysis fluid chamber within the dialyzer. As a result, during the dialysis fluid recirculation cycle, at most 2/3 of the volume of fluid within the dialysis fluid chamber will be replaced by fresh dialysis fluid. Preferably, the duration of the recirculation cycle is approximately equal to the duration of the balance chamber filling cycle.

Abstract: A method is disclosed for the cyclic regeneration of a water softening system having a plurality of parallel water treatment units, N, each containing a water softening treatment bed which requires periodic regeneration. The method entails first calculating a volume of water to be treated per cycle, V.sub.s, by dividing the capacity of the smallest capacity treatment unit by N. Water is then treated with all the treatment units until V.sub.s water has been treated by any of said units. Once V.sub.s water has been treated by any of the units, an arbitrarily selected first unit is subjected to regeneration while water is treated with all the remaining units. The process is continued by sequentially selecting the next remaining treatment unit for regeneration once another V.sub.s volume of water has been treated by any of the units.

Abstract: A system is provided for weighing and monitoring flow from multiple fluid sources into a flow system wherein incoming fluid is received in a weighing bag attached to a control system for monitoring the amount of fluid passed through the weighing bag and for preventing admission of air into the flow system. An alarm attached to the weighing bag warns when fluid in the weighing bag is approaching empty, so that the fluid in the weighing bag can be replenished from the fluid source before the weighing bag runs dry. If fluid in the weighing bag is not replenished, the system automatically shuts down.The fluid pump can be absolutely calibrated using the controlled admission of known amounts of fluid into the weighing bag so that the amount of fluid introduced into the flow system through the weighing bag can be calculated automatically.

Abstract: Apparatus is provided for use as an in-line fluid flow monitor through filter media of a variety typically employed in households upstream of a kitchen faucet. The apparatus includes a housing with an input port leading to a housing cap within which a turbine chamber retains a rotating turbine. The rotating turbine is coupled to a reduction gear train positioned within a gear housing, in turn, retained within the body of the housing in a reduction gear chamber. Fluid communication is provided from the turbine chamber to the gear reduction chamber. The gear reduction chamber ends in an eccentric output which drives the pawl of a pawl and ratchet assembly forming a part of a rotatable valve. This rotatable valve rotates in increments as a camming stem affixed thereto moves along a camming surface until encountering a slot component.

Abstract: Apparatus is provided for use as an in-line fluid flow monitor through filter media of a variety typically employed in households upstream of a kitchen faucet. The apparatus includes a housing with an input port leading to a housing cap within which a turbine chamber retains a rotating turbine. The rotating turbine is coupled to a reduction gear train positioned with a gear housing, in turn, retained within the body of the housing in a reduction gear chamber. Fluid communication is provided from the turbine chamber to the gear reduction chamber. The gear reduction chamber ends in an eccentric output which drives the pawl of a pawl and ratchet assembly forming part of a rotatable valve. This rotatable valve rotates in increments as a camming stem affixed thereto moves along a camming surface until encountering a slot component.

Abstract: A method and apparatus for controlling a fluid treatment apparatus that includes a resin tank containing an ion exchange media. A control valve controls the regeneration cycle and includes a regeneration control turbine operatively connected to a regeneration control disk forming part of a servo system. During regeneration, a meter flow of fluid emitted by a regeneration control nozzle produces rotation in the turbine to effect a regeneration sequence. Regeneration is initiated by a regeneration initiating nozzle which emits a stream of fluid at the turbine for a predetermined time interval in order to initiate a regeneration cycle. A control system includes a sensor for monitoring the fluid quality level of the source fluid or the treated fluid and initiates regeneration. When the control system is used with the disclosed control valve, the control system communicates presssurized fluid to the regeneration initiating nozzle upon sensing a predetermined quality level.

Abstract: In a process for degassing and filtering liquids, particularly coating emulsions, a feed stream (F) is subdivided into a process stream (N), which is fed continuously to a process use through a main filter (16), and a recycled fractional stream. The fractional stream (T) is used to backflush successive sections of the main filter (16) and in turn is filtered through a supplementary filter (21, 22). In the apparatus for the process, a backflushing device (17) is associated with the main filter (16), the fractional stream (T) is used as a flushing means and the filter surface of the main filter (16) is cleaned progressively. Thus, a liquid with a continually constant grain size distribution, without gas bubbles and particles that cause defects, can be delivered continuously to the specific use.

Abstract: A fluid metering device (10) is provided for automatically restricting (i.e., shutting off or reducing) fluid flow to a filter (16). The metering device (10) has a vane (32) which turns as fluid flows and thereby drives a gear (92). Once the vane (32) has rotated a selected number of times, as a result of the fluid flow, the rotation of the gear will break a frangible link (82), causing the fluid flow to stop or reduce by closing a valve (60). The customer will know to replace the filter (16) when the fluid no longer flows or is substantially reduced, and the customer will also have to replace the frangible link (82) to enable the fluid to flow at full volume again.

Abstract: A blood processing apparatus which comprises a blood circulating circuit including a plasma filter, a plasma circulating circuit for draining at least a portion of the blood plasma and for supplying a physiologically compatible fluid substitute to the subject through a portion of the blood circulating circuit, a blood pump and a drain pump, a priming fluid source adapted to be connected with the blood outlet and a fluid substitute inlet, a first detector for detecting the flow through the blood circulating circuit, a second detector for detecting the flow through the plasma circulating circuit, a first valve for selectively establishing and interrupting a first fluid circuit between a downstream portion of the plasma circulating circuit adjacent the blood outlet and that portion of the blood circulating circuit downstream of the plasma filter, a second valve for selectively establishing and interrupting a second fluid circuit between the downstream portion of the plasma circulating circuit and the outside of

Abstract: A water treatment system including a pair of tank assemblies 110, 112 interconnected by a valve module 114 for controlling the communication of water to be treated to an on-line tank and the regeneration of an exhausted tank. Each tank assembly includes a compartment containing a water softening resing 125 and a compartment centering an iron filter media. The valve module is connected to a regeneration solution reservoir 150 by brine conduits 164, 220. A pumping assembly 192 automatically transfers a predetermined amount of a supplemental regenerant fluid from a well 168 into the regeneration solution reservoir at the conclusion of a regeneration cycle. The pumping assembly includes upper and lower chambers 194a, 196a communicating with the supplemental regenerant fluid reservoir 168 and brine supply conduits 164, 220 respectively.

Abstract: A water treatment or processor device for household use or commercial use (for example, in a restaurant) is provided with fail-safe features in accordance with this invention to shut the treatment device "off" when an element thereof has become ineffective, such as the saturation of an adsorption element or the clogging of a filter element. Once the device is turned "off", it cannot be restarted until the depleted element has been replaced.

Abstract: A water softening system and apparatus utilizes two tanks, one for service and one for regeneration, and a control system operated by soft water flow controls the operation of all valves and the sequences of regeneration. The control system utilizes parallel plate valves for switching from one tank to the next, parallel plate valves energizing the piston moving the switching valves, and a parallel plate valve structure for distributing the regeneration water, as to amount of flow, direction and timing. A two-way to one-way cam structure initiates the operation of a control cylinder which supplies soft water to the metering valve and the regeneration valve as and where needed.

Abstract: An improved water softener control valve having a housing defining a servo-control chamber that encloses concentrically mounted water usage and regeneration control discs. Each disc is incrementally rotatable by ratchet drives that are driven by water usage and regeneration control turbines, respectively, through associated reduction gear trains. The ratchet drive for the water usage disc includes a pawl that is engageable with the regeneration control disc, which upon predetermined movement in the water usage disc effects movement in the regeneration control disc to initiate a regeneration cycle. A rotatable insert is provided in the housing for manually rotating the regeneration control disc.

Abstract: A fluoridation system including a venturi capable of being inserted into a water line along the length thereof, the venturi including a throughbore having a diminishing tapered section followed by an increasing tapered section in the direction of liquid flow, a passage intersecting the throughbore and extending substantially perpendicularly thereto, mechanism associated with the venturi for withdrawing water from the water line, a first conduit for transferring water from the withdrawing mechanism, a flow rate measurer in the first conduit, a flow control in the first conduit, a fluoride chamber connected to the outlet end of the first conduit, and a second conduit connecting the fluoride chamber with the passage of the venturi which is substantially perpendicular to the throughbore thereof.