Abstract: A dialysis system includes a filtration system capable of filtering a water stream, a water purification system capable of purifying said water stream in a non-batch process, a mixing system capable of producing a stream of dialysate from mixing one or more dialysate components with the water stream in a non-batch process, and a dialyzer system. The dialyzer may be a microfluidic dialyzer capable of being fluidly coupled to the stream of dialysate and a blood stream.

Abstract: A method and system for wastewater treatment comprising a first treatment zone (11) fluidly connected to one or more further treatment zones (12, 13, 14), a membrane module (16) comprising a filter membrane positioned in or fluidly connected to the further treatment zone (14), a gravity settling device (15) fluidly connected to the first treatment zone (11) to receive overflow therefrom; and a flow control device (23) between the first treatment zone (11) and the gravity settling device (15) to control the flow of liquid therebetween.

Abstract: A carbon adsorption vessel for use in a CIP (carbon in pulp) or CIL (carbon in leach) process may be constructed. A slurry is obtained having dissolved (leached) precious metals. The slurry is brought into contact with carbon particles and is passed through a retention screen in the vessel. The dissolved precious metals adhere onto the carbon particles. An air lift pump provides the pressure differential necessary to drive the slurry through the retention screen, wherein the carbon particles are retained by the retention screen and the slurry passes through the retention screen. After passing through the retention screen, the slurry is received in to a receiving vessel that may be situated at, below or above the level of source vessel.

Abstract: Plant for filtering substances to be cleaned of various kinds of semi-solid or liquid polluting substances, constituted by filtering devices (5) connected to each other, including a first circulation circuit of the substances to be cleaned introduced into each filtering device (5) for discharging the polluting substances after having been cleaned; a second circulation circuit of the cleaned liquids and the exit from the plant, and the possible collection into suitable containers; a third circulation circuit of suitable plant washing liquids, so as to clean the various plant component parts of the polluting substances remaining after one or more working cycles. The plant being arranged to set pre-established operative programs, such as to determine a working cycle composed by a first rest step, a second filling step, a third filtering step, a fourth emptying step, a fifth discharge step, a sixth rinsing step and a seventh washing step.

Abstract: A multipurpose hemofiltration system and method are disclosed for the removal of fluid and/or soluble waste from the blood of a patient. The system continuously monitors the flow rates of drained fluid, blood, and infusate. When necessary, the pumping rates of the infusate, drained fluid and blood are adjusted to remove a preselected amount of fluid from the blood in a preselected time period. A supervisory controller can monitor patient parameters, such as heart rate and blood pressure, and adjust the pumping rates accordingly. The supervisory controller uses fuzzy logic to make expert decisions, based upon a set of supervisory rules, to control each pumping rate to achieve a desired flow rate and to respond to fault conditions. An adaptive controller corrects temporal variations in the flow rate based upon an adaptive law and a control law.

Abstract: A portable water purifier for purifying a liquid to a safe form acceptable for drinking may be provided. The portable water purifier may include a container configured to hold the liquid, a filtering mechanism connected to the container configured to filter out dirt or sediment floc from the liquid, and a transport mechanism in communication with the filtering mechanism configured to transport the liquid into the filtering mechanism. The portable water purifier may also include a mixer inside the container configured to disperse a chemical disinfectant or a flocculating agent tablet within a liquid, for instance water.

Abstract: A water filtration system utilizing line pressure is disclosed. The water filtration system comprises an optional carbon or KDF filter unit or a series of membranes, line pressure filter system, water tank and water pump. Water from a pressurized water source (e.g., municipality water or well) is passed through the carbon or KDF filter and line pressure filter system prior to being deposited into the water tank. A pressure-regulated pump draws water from the water tank upon demand. An automatic pressure regulator on the pump ensures that the water pressure at water-dependent devices (e.g., showers) remains at a desired level regardless of demand. An optional ozone generator may also be incorporated into the system such that water in water tank is provided with O3. A second water tank may be dedicated to holding and supplying non-purified water thereby eliminating any waste water.

Abstract: A drainless reverse osmosis (RO) water purification system provides relatively pure water for on-demand dispensing, while recycling brine to a domestic hot water system. The drainless purification system includes a pre-filter catalyst cartridge for removing chlorine-based contaminants from a tap water supply upstream from an RO membrane. The catalyst is regularly refreshed by a high through-flow of water to a conventional cold water dispense faucet, thereby significantly prolonging the service life of the RO membrane. The RO membrane is incorporated into a multi-cartridge unit adapted for facilitated slide-out removal and replacement as needed. A control valve recycles brine from the RO membrane to the hot water system during pure water production, and recirculates tap water through the RO membrane when a pure water reservoir is substantially filled. The multi-cartridge unit may further include an air filtration system for providing a flow of filtered air.

Abstract: The present invention relates to a deaerator 2 including: a liquid flow space; reduced-pressure spaces 25A, 25B, and 25C; gas permeable films 21A, 21B, and 21C that separate these spaces; and a pump for discharging gas from within the reduced-pressure spaces 25A, 25B, and 25C to the outside, and to a liquid chromatograph equipped with the deaerator 2. The deaerator 2 further includes gas partial pressure variation suppression means 23A, 23B, 23C, 25Ab, 25Bb, 25Cb, 29A, 29B, and 29C for suppressing variations in partial pressures of a specific gas in the reduced-pressure spaces 25A, 25B, and 25C.

Abstract: The invention concerns a filter element (1), in particular of a fuel filter for motor vehicles. The filter element (1) is provided for exchangeable use in a filter housing (2) and comprises a filter body (3) with a filter material (5) that is arranged in folds (4). Between two folds (4) a heating element (6) for the fuel is arranged.

Abstract: According to an aspect of the present disclosure, a fluid supply assembly fluidly connectable to a source of fluid is provided. The fluid supply assembly includes a housing (702); a hydraulic assembly (710) supported within the housing (702), wherein the hydraulic assembly (710) is configured and adapted to pressurize the fluid which is supplied to a solenoid shut-off valve (724); a tank assembly (714) supported within the housing (702) for retaining a quantity of pre-conditioned fluid therein; and a filter assembly (720) supported within the housing (702) and in fluid communication with the hydraulic assembly (710).

Abstract: The present invention relates to a method of removing blood from an extracorporeal blood circuit following termination of a blood treatment session, wherein blood is concurrently removed both from an arterial conduit portion and from a venous conduit portion of the extracorporeal blood circuit. It further relates to a method for recognizing and/or eliminating air inclusions in or from an extracorporeal blood circuit and a treatment apparatus as well as a tube system.

Abstract: Continuous flow water treatment systems, devices and methods that reduce the costs associated with using oxidizing agents in water treatment by maximizing mixing energy with pressure of the solution in a continuous flow system. The systems comprise an inflow conduit that provides water to be treated to a mixing chamber in a housing, a first chemical injector mounted into either the inflow conduit or the housing that provides an oxidizing agent into the water flow, a driven impeller mounted within the mixing chamber that maintains the flow of fluid through the apparatus and provides agitation to the fluid within the mixing chamber, and an outflow conduit for expelling the treated water from the mixing chamber. The outflow conduit may be pressurized to increase the mixing energy in the mixing chamber.

Abstract: A water-purifying device for increasing oxygen content has at least one filter and a gas-liquid mixing device, and the gas-liquid mixing device comprises a pump and a spiral tube, wherein air enters the pump through a first gas inlet valve disposed at the front end of the pump and is mixed with the water source in a gas-liquid phase within the spiral tube to form a large amount of fine bubbles, thereby achieving the effect of increasing the oxygen content in water.

Abstract: A process for separating a feed F by simulated moving bed adsorption in a SMB device is described, the device comprising external bypass lines Li/i+1 which directly connect two successive plates Pi, Pi+1, the index i being either even or (exclusive of the foregoing) odd, along the whole length of the column, in order to flush said plates, in which each of the bypass lines Li/i+1 comprises automated means for regulating the flow rate in the bypass lines, the degree of opening of said regulating means being defined by the following three rules: a) establishing a flow rate corresponding to an oversynchronicity in the range 15% to 30% in all of the open bypass lines of zone 1; b) establishing a flow rate corresponding to the synchronicity to within plus or minus 8% in all of the open bypass lines of zones 2 and 3; c) establishing a flow rate corresponding to an oversynchronicity in the range 20% to 40% in all of the open bypass lines of zone 4.

Abstract: Methods and systems are disclosed for treating a drilling fluid mixture including feeding the drilling fluid mixture to a hydrocyclone (or hydrocyclones) with a flow-volume-adjustable inlet for controlling flow of the drilling fluid mixture into the hydrocyclone(s). This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).

Abstract: The invention relates to a multi-component part transducer assembly for determining the pressure of a fluid of interest. One part of the assembly comprises a reusable transducer, another part a disposable component comprising a flexible membrane which is in pressure connection with the fluid of interest, and another part comprises a locking component for securing the reusable and disposable parts together.

Abstract: A pressure driven apparatus comprising a housing, at least one flexible membrane located within the housing so as to divide the interior of the housing into a plurality of chambers, one or more inlets through which a pressurised fluid enters the housing and one or more outlets through which the pressurised fluid exits the housing, and wherein the membrane is adapted for connection to a drive member such that movement of the pressurised fluid within the housing results in the membrane imparting a force to the drive member.

Abstract: A local sewage processing unit is provided that receives sewage from a local source of sewage, extracts water from the received sewage that is suitable for re-use and includes a pump that is configured to pump sewage from a receiving section of the local sewage processing unit into a pressure sewer network, as required.

Abstract: A system is provided for water purification for a recirculation shower in a transport with a filtration unit, a first backwash line and a second backwash line. The filtration unit is designed to filter used shower water. The first backwash line and the second backwash line are designed to clean the filtration unit with a backwashing. The first backwash line is designed to convey backwash water to the filtration unit. The second backwash line is designed to discharge backwash water from the filtration unit.

Abstract: Intended is to reduce pressure fluctuations across a filter (14) for filtering a resist liquid.

Abstract: A filter unit for separating target materials from microparticles using an eluent includes: an inlet; a separator unit which separates the target materials from the microparticles using the eluent; an outlet; and a filter which is interposed between the outlet and the separator unit and filters the microparticles. A volume of the separator unit is less than a volume of the eluent provided to the separator unit.

Abstract: Treating wastewater by receiving wastewater having a reduced concentration of waste solids into a secondary containment space and allowing the waste solids to distribute into a lower horizontal sludge layer, an upper horizontal scum layer, and a relatively clear horizontal layer of liquid therebetween; flowing the liquid from the relatively clear layer through at least one filter element enclosed in a housing the top of which is submerged below the wastewater level of the secondary containment space; and thereafter flowing the filtered effluent out of the housing. In some embodiments, the filtered effluent may be discharged from the secondary containment space using an effluent pump configured with a conventional flow inducer or, alternatively, using an effluent pump sealably configured with a shortened flow inducer thereby allowing discharge of the filtered effluent to a wastewater level below that of the pump's intake.

Abstract: The arrangement for connection of a medical device, particularly a dialysis device, to a permeate line for the supply of permeate into the device is characterized by an adapter comprising a first supply line section with a terminal coupling member for connection to the water line, a pressure sensor and two successively arranged shut-off valves, and two second supply line sections that branch off from the first supply line member by means of a branching member. Both second supply line sections are connected to two different lines of the device in such a manner that disinfection fluid flows through both second supply line sections in a disinfection process of the device.

Abstract: An apparatus and a method for an ozone-based treatment of polluted water are disclosed. The apparatus and the method generally comprise three stages. The first stage is an ozone treatment stage wherein the polluted water is treated with ozone gas. The second stage is a gas-liquid separation stage wherein excess non-dissolved gases, from the ozone treatment stage, are removed from the water whereby the water exiting the gas-liquid separation stage is substantially saturated with dissolved gases and substantially free of non-dissolved gases. The last stage is a membrane filtration stage wherein the gas-saturated water generally undergoes micro-filtration or ultra-filtration. Microbubbles formed during this final stage generally prevent the accumulation of particles and pollutants on the surface of the membranes and/or inside the openings or pores thereof; thereby acting as a self-cleaning mechanism for the membrane filter.

Abstract: The invention describes a process for the separation of an oil/water mixture into an oil rich phase and a water rich phase using an inline separation device, an inlet, a vortex generating chamber, a central separation chamber, and an outlet and providing an oil rich phase discharge pipe and a water rich phase discharge pipe. The process further also comprising a) the provision of an additional tangential or axial inlet into the vortex generating chamber or the central separation chamber and introducing an additional amount of oil/ater mixture tangentially and/or axially into the vortex generating chamber or the central separation chamber, or b) adjusting the vortex generating means to control the rotation of the vortex, or a combination of a) and b). The invention further relates to a device for carrying out the above process and to the use of such a device in the separation of oil/water mixtures.

Abstract: The present application relates to a surface separation system used to separate fluids such as oil, gas, water, and/or sand slurry produced from a well. The separation system may include a pumping system, such as a horizontal pumping system (HPS), a separator, and flow control hardware. The separator system may be mounted on a skid or incorporated directly into a production flow. The separator system may be used in conjunction and/or in parallel with a conventional surface separation facility.

Abstract: A subsurface wave action harnessing system includes a seabed mounting plate adapted for securing to a seabed, a wing having generally opposed first and second wing surfaces extending between a first and second wing ends, the second wing end being pivotably mounted to the seabed mounting plate such that pivoting motion about a pivot axis generally parallel to the mounting plate is imparted to the wing by subsurface wave action acting on the first and second wing surfaces, and a drive arm pivotably connected to the wing to convert the pivoting motion into reciprocal motion. An electrical generator, water purifier or other wave action load can be driven by the drive arm.

Abstract: In a fluidized bed method and apparatus for stimulating reaction between a particulate reactant material and a fluid flowing through the reactant material, the incidence of coalescing of particles of the reactant material is reduced by mixing the particulate material with a particulate abrasive.

Abstract: Methods and systems for processing of liquids using compressed gases or compressed air are disclosed. In addition, methods and systems for mixing of liquids are disclosed.

Abstract: Methods, systems, drain vaults, and tools are employed to treat storm water runoff from a watershed. The methods and system may include multiple drain vaults that function to receive and allow quiescence of the water so that laminate flow may be achieved between adjacent vaults. The drain vaults may be made of stacked together vault sections held in compression, and screens and arrays of tube elements are with different drain vaults. There may be combined systems where in an upstream system flow is uncontrolled during a rainstorm and some of the rainfall water is diverted to a retention structure and then in a control flow rate is transferred to a downstream treatment system that may use tube elements. A tool is used to clean the tube elements.

Abstract: A device for manipulating particles present in a fluid medium is disclosed. The device comprises a planar substrate, formed with at least one primary microchannel to allow passage of the fluid medium therethrough. The primary microchannel(s) has walls and a base and being in fluid communication with a plurality of secondary microchannels via at least one branching point. The device further comprises one or more ultrasound transmission pairs, positioned at opposite sides of the walls to generate ultrasound waves propagating through the fluid medium, substantially parallel to the planar substrate, such as to form a standing wave within the primary microchannel.

Abstract: The present invention provides a membrane filtration system (1) including: a filtering membrane portion (3) for removing impurities in feed water; a drain line (16) for draining a part of concentrate from the filtering membrane portion (3) to an exterior of a system; a concentrate return line (17) for returning a remainder of the concentrate from the filtering membrane portion (3) to an upstream side of the filtering membrane portion (3); a return flow rate adjusting portion (28) for concentrate provided in the concentrate return line (17); and a control portion (30) controlling the return flow rate adjusting portion (28) based on a drain flow rate of the concentrate or a flow rate of product water from the filtering membrane portion (3). With this construction, it is possible to suppress wasteful power consumption in a feed pump (7) for feeding water to the filtering membrane portion (3) and to prevent clogging in the filtering membrane in the filtering membrane portion (3).

Abstract: The disclosure relates to methods and related systems for monitoring and controlling biological activity in municipal and industrial wastewater treatment systems. In particular, the disclosure relates to methods for controlling airflow in a bioreactor type, activated sludge wastewater treatment system by real-time monitoring of one or more parameters of the wastewater treatment system.

Abstract: A hemodialysis apparatus includes a blood processing machine, a blood circuit through which blood led from a patient flows, a blood pump attached to the blood circuit to pump blood, a dialysate circuit, a clamp disposed downstream of the blood pump for the blood circuit to block the blood circuit, a blood pressure sensor for detecting the pressure of a part of the blood circuit between the blood pump and the blocker, and a control unit connected with the blood pump and the blood pressure sensor. The control unit is configured to determine, based on the pressure detected by the blood circuit pressure detector, whether or not the blood circuit has encountered abnormal conditions while the blood circuit blocked by the clamp is filled with liquid by the blood pump (steps SA2, SA3, and SA5).

Abstract: Methods and systems for energy recovery in desalination or other systems are provided to transfer the pressure energy from one fluid to anther fluid. A system for energy recovery with a container comprises two sections separated by one or plurality of flexible impermeable diaphragms and pressures of the two fluids in the two sections are transmitted during the cyclical filling and pumping operations, as well as flow control valves. As one embodiment, two flexible impermeable tubes operable to receive two fluids of different pressures respectively connect to flow control valves. The first fluid and the second fluid are separated by the flexible impermeable diaphragm formed by the flexible tubes. Cyclical inflows of the two fluids transmit the higher pressure of one fluid to the other through the diaphragm and transfer the energy from one fluid to the other.

Abstract: Artificial kidney for gradual, and at least semi-continuous, blood treatment, wherein a blood stream is fed from a body of a living human or animal being into the artificial kidney, where anticoagulation is first effected, blood cells and molecules of large and medium molecular weight, such as proteins, are then primarily separated from plasma and fed back to the blood stream, regulating a water and salt balance by diverting excess plasma water and further removing from the blood stream, plasma or plasma water accumulated and toxic substances, by removal of specific electrolytes and waste products and wherein purified or partially purified plasma and plasma water is being carried back to the blood tract of the body.

Abstract: This invention concerns a method, devices, instrument and program for extraction an ingredient from a liquid sample by bidirectional transfer of an aliquot of fluid between compartments, the method can be applied to a wide variety of laboratory techniques such as; solid phase extraction by filter disc, column chromatography, magnetic separation, diagnostic tests and others, the system is suitable for single or multi sample handling, manual operation or integrated into an automated system, can be used in a lab or in field.

Abstract: A method for oxidizing an organic material includes the steps of (a) forming a preoxidation mixture comprising the organic material and water, and (b) causing the preoxidation mixture to react with a liquid oxidizer in a continuous flow reactor supercritical conditions for water, including a pressure of at least 3206 psia and a temperature of at least 705° F., to form a post-oxidation mixture containing condensible material and non-condensible material, wherein substantially all of the organic material has been oxidized.

Abstract: An oil filtration assembly for filtering oil comprises a housing having an inlet port and an outlet port defining a flow path for oil to flow therethrough. A diatomaceous earth filtering media layer is disposed in the oil flow path, intermediate of the inlet port and the outlet port and is configured to filter soot and contaminants from oil passing through the oil filtration assembly.

Abstract: The present invention relates to a system and a process of running the system that allows for the long term filtration of product without loss of filtration capability due to clogging or fouling. The system is a normal flow filtration system having one or more filter cartridges attached to an outlet of a housing in the system. The filter cartridge(s) are contained within a bowl and depend preferably vertically from the outlet. Liquid enters the bowl of the housing and contacts the outer surfaces of the one or more cartridges. Impurities are trapped on or in the surface of the filter and the filtered liquid flows through the filter and through the outlet. One or more parameters such as flow rate, transmembrane pressure drop and/or time are measured and when the desired parameter(s) are met, the filtration ceases. A backflushing occurs back through the filter cartridges so as to remove the trapped impurities on or in the filter surface.

Abstract: A screen system having first and second side members, each having a locking gear reversibly movable from a locked position to an unlocked position. A screen is coupled to the side members. The screen has openings and is rotatable from a closed position to an open position. The screen is engagable with the locking gears to preventing the screen from rotating from the closed position to the open position. A trigger plate is movably coupled to the screen, rotates from a first position to a second position and is engagable with the locking gears to prevent the locking gears from moving from the locked position to the unlocked position. The trigger plate disengages with the locking gears when water flows against it, allowing the locking gears to move from the locked position to the unlocked position and the screen to rotate from the closed position to the open position.

Abstract: An immersion lithographic apparatus typically includes a fluid handling system. The fluid handling system generally has a two-phase fluid extraction system configured to remove a mixture of gas and liquid from a given location. Because the extraction fluid comprises two phases, the pressure in the extraction system can vary. This pressure variation can be passed through the immersion liquid and cause inaccuracy in the exposure. To reduce the pressure fluctuation in the extraction system, a buffer chamber may be used. This buffer chamber may be connected to the fluid extraction system in order to provide a volume of gas which reduces pressure fluctuation. Alternatively or additionally, a flexible wall may be provided somewhere in the fluid extraction system. The flexible wall may change shape in response to a pressure change in the fluid extraction system. By changing shape, the flexible wall can help to reduce, or eliminate, the pressure fluctuation.

Abstract: A power source for actuation of a microfluidic device and related devices, methods and systems.

Abstract: A contaminate separation apparatus for use in separating contaminant materials from cellulose and/or paper fibres in a paper recycling process includes a reservoir for receiving a waste paper slurry therein. The reservoir is provided with an inlet opening for the input of the slurry, one or more fibre discharge outlets or passages, and at least one waste outlet positioned vertically above the fibre discharge outlet opening. An agitator provided in a lower portion of the reservoir generates differential flow currents within the reservoir, to selectively divert plastics, waxes, adhesives and/or other sticky waste materials outwardly towards the waste outlet, while providing a flow of suspended paper and/or cellulose fibres to one or more of the fibre discharge outlets.

Abstract: A water treatment apparatus includes a first fluid channel that can circulate contaminated water in the water body, a first inlet that draws the contaminated water into the first fluid channel, and an outlet that allows the contaminated water to exit the first fluid channel. A second fluid channel installed with a filter therein can filter contaminated water in the water body to produce a filtered water flow. A fluid transport apparatus can draw the contaminated water through the first fluid channel and the second fluid channel. A flow control system allows water to flow in a predetermined angular range while blocking at least a portion of the remaining angular range in at least one of the first inlet and the outlet to achieve mixing coverage with different aspect ratio. The position of the outlet can be adjusted to optimize the flow rate and pattern.

Abstract: A swimming pool skimmer formed to include an integral disinfectant dispenser. The disinfectant dispenser is adapted to enable infinite adjustment to the level of disinfectant dispensed into the normal flow of the pool water. The skimmer includes a valve that is used to adjust the flow of water distributed to the disinfectant dispenser. The flow rate of water entering the dispensing chamber is controlled by the valve, which controls the water level within the dispensing chamber. The amount of water exiting the dispensing chamber is controlled by a vertically extending elongated flow slit. The higher the water level in the dispensing chamber causes more exposure to the chlorine tablets, increasing the chlorine level in the dispensing water. Chlorinated water exits the flow slit and enters the skimmer main chamber.

Abstract: A method and system for filtering oil and the like having a feed tank connected to a cell having a sintered or ceramic module that restricts particles greater than 0.1 microns to seep through. The pressure, temperature, and flow rate of the fluid are selected to create optimum viscosity of the fluid.

Abstract: To facilitate cleaning and to facilitate management thereof, a dust-removal managing pit is provided with an upper pit having a bottom and to which an inflow pipe is connected and a cylindrical lower vertical pit having its upper part connected to the upper pit for supplying water flowing down from an upper-end opening portion to a water storage tank. The upper end of the lower vertical pit is provided penetrating a bottom wall of the upper pit, while a peripheral wall of the upper pit is provided so as to surround the upper end of the lower vertical pit, and a peripheral groove for precipitating solid substances contained in water is formed between the periphery of the upper end of the lower vertical pit and the peripheral wall. A mesh plate constituted capable of filtering water leading to the peripheral groove is provided on the upper pit. One end of a drain pipe with the other end connected to a sewer pipe is connected to the peripheral wall, and an adjusting valve is provided in the drain pipe.

Abstract: A gray-water recycling system for reclaiming gray-water for use in toilets and lawn care. The system includes a reservoir adapted to treat gray-water and includes an intake pipe, an outlet pipe and an overflow pipe. An inlet coupled to the intake pipe supplies gray-water to the reservoir. A filter is fluidly coupled to the outlet pipe for filtering gray-water to define processed gray-water. A pump is fluidly coupled to the by a pipe. A first valve (24) controls flow of the processed gray-water from the pump. The first valve is fluidly coupled to the pump, a fresh water inlet and a processed gray-water outlet. The first valve is adapted to open the fresh water if the water pressure from the processed gray-water falls. Also included is a pressure valve (52) adapted to manually adjust the pressure of the processed gray-water outlet and to allow a flow of fresh water in the event the solenoid of the first valve fails to operate.