6 Stage Reverse Osmosis Micro Computer Controlled+TDS 75 gallons per day
  • p1050669

6 Stage Reverse Osmosis Micro Computer Controlled+TDS 75 gallons per day

6 Stage Reverse Osmosis Unit Micro Computer Controlled+TDS


Item#: DA-RO75 +TDS

Out Of Stock



NSF 58 Standard 6 stage Reverse Osmosis Unit Micro Computer Controlled & TDS meter 


NOW WITH Fully automated Micro Computer Control + TDS Meter built in.

Now compare this to other units! Great Value! 

If you are in the market for an RO filtration system, WATCH OUT.  Most Budget Priced RO systems are bare basic 3 or 4 stage filtration units, without their own inbuilt pressure pump.

With this unit, however you are getting the real McCoy, at a fraction of its retail cost.

This water filter enables the user to bring nearly any quality water to drinkable standard.

FUNCTIONALLY CONVENIENT  A processor controlled digital output TDS meter tracks water purity and performance. Finally, standardized fittings and cartridges remove all suppositions from installation and replacement routines.

EXCLUSIVE FEATURES  ~1:1 Pure/Waste water ratio (source water temperature dependant)
Fully-Automated water management
Professional grade digital TDS meter
Automatic backflush system prevents TDS creep
High-pressure electronic shut-off for reservoir use
High efficiency booster pump.

Footprint 15" x 8"
Height 18"
Hydrotek-75 GPD membrane
5 µ polypropylene sediment cartridge
0. µ carbon block cartridge
High capacity Granular Carbon cartridge

PP Spun Filter
DOW HP-100 booster pump
All ¼"push-connect fittings
Includes canister wrench and all installation adaptors and fittings



Replacement cartridge set for sale here


Procuring pure water rests at the very baseline of success for the modern aquarist.  It rises to this challenge with the conception of the Deluxe RO water filter. Through sound component selection and optimization of contaminant extraction, Deluxe  RO units minimize energy use, water consumption and media replacement.
The on-board microprocessor controller enables every Deluxe  RO unit to function with full automation. At set intervals, the unit will perform routine system backflushes, preserving the longevity of the membrane and efficiency. The unit is further featured with a shut-off solenoid which halts all water transit during instances of backpressure or loss of power to the controller.
Each Deluxe DOW RO system is furnished with a DOW HP-100 Booster Pump, enabling the setup to operate at the lowest source water pressures. By closely monitoring the water input, Deluxe  RO systems are amongst the most eco-friendly units, producing pure water with absolutely minimal waste.

  • All the pure water system Reverse Osmosis models consist of RO and Post Treatment process when added together produce the finest complete water treatment system.   

This is the only proven way to take out the contaminants in your Town Water, Tank Water and Dam / Pond Water. For those that do not like Fluoride this is the only means of eliminating this additive in your Town Water.   

Micro Computer  Controlled for  full  automation, this is the  main  advantage over  other system  being  currently sold. Added Value at no Extra Price.   

The stages are as follows (please refer to attached diagram):  

  1. Poly Sediment Filter - this filter is designed for purity, corrosion and chemical resistance, available at 10 micron. This removes sand, salt, dirt and rust particles.  
  2. Active Carbon Filter - this filter is for the effective removal of chlorine, foul taste and other filter problems generated over a long period of time.
  3. Block Carbon Filter -  this filter is for the effective filtration of water for certain VOC’s (Volatile Organic Compounds (are organic chemical compounds that have high enough vapor pressures under normal conditions to significantly vaporize and enter the atmosphere. A wide range of carbon-based molecules, such as aldehydes, ketones, and other light hydrocarbons are VOCs), eg: chlorine taste and odor and sediment reduction down to 5 microns.
  4. Reverse Osmosis Filter – This is for the RO desalting through and RO membrane. 

  5. In-line Granular Active Carbon Filter – this filter is for the removal of further taste and odor.  

  6. What is Reverse Osmosis?

    Reverse osmosis (RO) is a separation process that uses pressure to force a solution through a membrane that retains the solute on one side and allows the pure solvent to pass to the other side. More formally, it is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure. This is the reverse of the normal osmosis process, which is the natural movement of solvent from an area of low solute concentration, through a membrane, to an area of high solute concentration when no external pressure is applied. The membrane here is semi permeable, meaning it allows the passage of solvent but not of solute.   

    The membranes used for reverse osmosis have a dense barrier layer in the polymer matrix where most separation occurs. In most cases the membrane is designed to allow only water to pass through this dense layer while preventing the passage of solutes (such as salt ions). This process requires that a high pressure be exerted on the high concentration side of the membrane, usually 2–17 bar (30–250 psi) for fresh and brackish water, and 40–70 bar (600–1000 psi) for seawater, which has around 24 bar (350 psi) natural osmotic pressure which must be overcome.   

    This process is best known for its use in desalination (removing the salt from sea water to get fresh water), but it has also been used to purify fresh water for medical, industrial and domestic applications since the early 1970s.   

    When two solutions with different concentrations of a solute are mixed, the total amount of solutes in the two solutions will be equally distributed in the total amount of solvent from the two solutions.   

    Instead of mixing the two solutions together, they can be put in two compartments where they are separated from each other by a semi permeable membrane. The semi permeable membrane does not allow the solutes to move from one compartment to the other, but allows the solvent to move. Since equilibrium cannot be achieved by the movement of solutes from the compartment with high solute concentration to the one with low solute concentration, it is instead achieved by the movement of the solvent from areas of low solute concentration to areas of high solute concentration. When the solvent moves away from low concentration areas, it causes these areas to become more concentrated. On the other side, when the solvent moves into areas of high concentration, solute concentration will decrease. This process is termed osmosis. The tendency for solvent to flow through the membrane can be expressed as "osmotic pressure", since it is analogous to flow caused by a pressure differential.   

    In reverse osmosis, in a similar setup as that in osmosis, pressure is applied to the compartment with high concentration. In this case, there are two forces influencing the movement of water: the pressure caused by the difference in solute concentration between the two compartments (the osmotic pressure) and the externally applied pressure.  

    Please refer to the Inorganic Contaminant Chart that is attached for what it does remove.  

    Please also refer to the following explanations to this chart  

    Cellulose triacetate   

    The carbon pre-filter is omitted and cellulose triacetate membrane (CTA) is used. The CTA membrane is prone to rotting unless protected by the chlorinated water, while the TFC membrane is prone to breaking down under the influence of chlorine. In CTA systems, a carbon post-filter is needed to remove chlorine from the final product water.    

    Thin Film Composites   

    In the process of reverse osmosis, Thin film composite membranes (TFC or TFM) are used. Thin film composite membranes are semi permeable membranes manufactured principally for use in water purification or desalination systems. They also have use in chemical applications such as batteries and fuel cells. In essence, a TFC material is a molecular sieve constructed in the form of a film from two or more layered materials.  

    Membranes used in reverse osmosis are, in general, made out of polyimide, chosen primarily for its permeability to water and relative impermeability to various dissolved impurities including salt ions and other small molecules that cannot be filtered. Another example of a semi permeable membrane is dialysis tubing

    System includes:  

    1.      18 litre pressure/storage tank

    2.      Reverse Osmosis Unit  

    3.      White Tubing  

    4.      Accessories: Tank Ball Valve, Drain Saddle Valve, Faucet Assembly, Piping Insert ¼” (5), Screws  

    5.      Manual  


    Volt: AC 220-240V – DC24V

    Daily Production: 189 litres (at 25 degrees Celsius)   

    Pressure Tank: 12 litres   

    Temperature: 5 – 45 degrees Celsius   

    Inlet Water TDS:  < 1000 ppm  

    Main Rejection: 92 – 99%   

    Treatment Stages: 6 

    Unit width is 38cm, depth of 19cm and height of 46cm. The storage tank is height of 38cm and width & depth of 27cm. Micro computer controls the likes of when you need to clean the filters rather than physical inspection as well as telling you when there maybe a water issue eg: blockage etc. 

    Concerned about Fluoride?

    Reverse Osmosis will remove 93.9% of Fluoride added to town water. Also these units have been certified, as indicated, for compliance to NSF standards for the REDUCTION (not complete elimination) of:

    • Arsenic V
    • Barium
    • Cadmium
    • Chloramine (monochloramine-aesthetic)
    • Chlordane
    • Chlroine (aesthetic)
    • Copper
    • Cysts (Giardia, Crytosporidium, Entamoeba, Toxoplasma)
    • Fluoride
    • Hexavalent Chromium
    • Lead
    • Mercury
    • MTBE (Methyl Tert Butyl Ether)
    • Nitrate/Nitrite
    • Particulate Matter, Class I (0.5 micron)
    • PCB (Polychlorinated Biphenyls)
    • Radium 226/228
    • Selenium
    • Total Dissolved Solids (TDS)
    • Trivalent Chromium
    • Toxaphene
    • Turbidity
    • Volatile Organic Chemicals 
    • Includes a storage tank (6th stage)
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