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Aqua Sky, inc. Since 1998 

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U.S.A (tech support ) +1-954-297-5093



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Website last update / the 30th of October 2023

Order Processing


  • U.S.A, Canada, Europe and Australia free shipping all orders.

  • Orders will be dispatched within one business day after an order has been received.

  • Orders placed on Friday after 3pm (Pacific Time) will begin processing the following Monday.

  • Confirmation email will be sent to customers once the order has been dispatched.

  • Please feel free to contact us for any additional information by email Phone toll free  1(800) 551-3221 

  • (New York U.S.A.) 

  • (California U.S.A.)

  • (Ontario Canada.)

  • (Athlone, Dublin Ireland.)   

  • (Manchester, U.K.)

  • (Dijon, France.)

  • (Nürnberg, Germany.)

  • (Kapfenberg, Austria.)

  • (Alice Springs, Australia.)

Buy online -  watersheield Replacement Filters - Set Of 3 Reverse Osmosis Cartridges organic cellulose reverse osmosis water system replacement filters, under sink 3 stagen watershield replacement filters, it includes 2 pre-filters and a membrane that must be replaced periodically. The different filters represent the different stages that the water goes through while being purified. Generally Pre - Filters and Post-Filters in watershield replacement filters can last around 8 To 12 months between changes. Only the Organic RO membranes can last as long as 5 years Stage

stage 1-

  • Sediment filter is the first filter installed in watershield replacement 3 stage  systeme . The main function of a sediment filter is to remove large and fine particles from a drinking water, such as sand, dirt, silt, and rust particles. Removal of such particles allows for a better performance of all the following filters, such as carbon block or GAC filters.
  • Micron rating: 5 Micron.
  • Dimensions: ( 11.9/7" ) x 2.2" (Almost 12 inch length)
  • Lifetime: Replace every year, depending on the water quality.
  • This filter is wrapped and sealed and meets NSF standards and regulations.
  • Filter will fit any residential reverse osmosis unit that features standard 10” filter housing Stage

stage 2-

  • Organic activated carbon filter are well-known for their highly efficient reduction of chlorine taste and odor taste and odors of many organic chemicals and volatile organic compounds.
  • All carbon filters are made with Organic high quality coconut shell carbon.
  • Micronrating: 5 Micron.
  • Dimensions: (11.9/7" ) x 2.2" (Almost12 inch length filter)
  • Lifetime: Replace every year, depending on the water quality.

This filter is wrapped and sealed and meets NSF Standards and Regulations. Filter will fit any residential reverse osmosis unit that features standard 10” filter housing

stage 3-

  • Organic reverse osmosis membrane 14 - 36 Gallon per day NSF certified Thin film TFC membrane is the main component of aquasky rot-4 Reverse osmosis unit.
  • Made with 100% Organic fine thin film flat sheet
  • 99% reduction rate of bacteria, pesticides, herbicides, and heavy metals from tap water.


Only the organic membrane has The micron rating of a thin film less than 1/10000th of a Micron
which is 620,000 Times finer than A human hair 2,500 Times smaller than bacteria 20 Times smaller than any virus .

Product Features:

  • 14 -36 Gallons per day capacity
  • 99% Stabilized salt rejection (Minimum Rejection 98%)
  • NSF/ANSI standard 58 listed
  • Operating Conditions Performance specifications based on 500 ppm tap water, 50psi (0.35 MPa) applied pressure, 67°F (25°C) feed water temperature, feed water pH 7.5-8.5 and 17% recovery. Element permeate flow may vary ± 11%.
  • Maximum operation pressure: 125 psi (0.89 MPa)
  • Maximum feed flow rate: 2 gpm
  • Maximum operating temperature: 111° F (46° C)
  • Maximum feed water turbidity: 1, 2 NTU
  • Maximum feed water SDI (15min): 6
  • Chlorine tolerance: 0
  • Feed water pH range: 3-12
  • Minimum brine flow to permeate flow ratio: 4.5:1

Watershield Replacement Filters - Set Of 3 Reverse Osmosis Cartridges

  • Set Of 3 Organic Flexcon reverse osmosis filters cartridges under sink reverse osmosis water systems - flexcon reverse osmosis for 122 -  3 stage water system

    This 3 stage systems uses:-

    1- Sediment pre-filter.

    2- Organic coconut shell carbon block pre-filter usa made.

    3- Organic RO membrane 50-75 GPD with different flow rates usa made.



    • US Water Reverse Osmosis Water Filters.
    • US Water Galaxy Reverse Osmosis Water Filters.
    • US Water Aquapurion Reverse Osmosis Water Filters.
    • Watts 5 stage Reverse Osmosis Water Filters.
    • Purevalue Reverse Osmosis Water Filters.
    • Proline Plus Reverse Osmosis Water Filters.
    • Proline Gold Reverse Osmosis Water Filters.
    • Nelson Reverse Osmosis Water Filters.
    • Isopure Reverse Osmosis Water Filters.
    • iSpring Reverse Osmosis Water Filters.
    • Tier1Reverse Osmosis Water Filters.
    • Hydronix Reverse Osmosis Water Filters.
    • Max Reverse Osmosis Water Filters.
    • AQUARIUM Reverse Osmosis Water Filters.
    • APEC Reverse Osmosis Water Filters.
    • APEX Reverse Osmosis Water Filters.
    • Titan Water Pro Reverse Osmosis Water Filters.
    • Home Pure Reverse Osmosis Water Filters.
    • Premier Reverse Osmosis Water Filters.
    • Blue Wave Water Reverse Osmosis Water Filters.
    • COP and all standard 5 stage RO Systems.
    • 3 stage ro filter replacement kit
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