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Aqua Sky - Since 1998



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Active  website / last updated February 2023

Order Processing

  • 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 -
  • tel U.S.A (954)297-5093  -  Worldwide Toll free number 1 (1800-551-3221)

Returns Accepted

  • within 10 days of the date you received your order .

  • Full refunds will be made in the same form of the original payment  .

  • Items must be returned unused, and must be in its original packaging and boxes .

  • refund will be same day we receive the item.  

  • please contact us by email before you ship items back to us -

Free  From The Following Locations :-  ​


(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.)

Aquasky ROT-4 and tankPro PRO-3.2, PA E RO 132 replacement filters for reverse osmosis water systems the original organic cellulose replacement filters Aquasky rot 4 under sink 3 stage systems, the Aquasky rot 4 Reverse osmosis water systems replacement filters include 2 pre-filters and a membrane that must be replaced periodically. The filters represent the different stages the water goes through while being purified. Generally, Pre - Filters and Post-Filters in RO systems can last around 8 To 12 months between changes. Only the Organic RO membranes can last as long as five years Stage

stage 1-

  • The sediment filter is the first filter installed in the Aquasky rot-4 Reverse Osmosis water filters system. The primary function of a sediment filter is to remove large and fine particles from 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: ( 8 3/4 ) x 2.5"
  • Lifetime: Replace every year, depending on the water quality.
  • This filter is wrapped and sealed and meets NSF standards and regulations.
  • The filter will fit any residential reverse osmosis unit that features a standard 10” filter housing Stage.

stage 2-

  • Organic activated carbon filters 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.
  • Micron rating: 5 Micron.
  • Dimensions: ( 8 7/8" ) x 2.5"
  • Lifetime: Replace every year, depending on the water quality.

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

stage 3-

  • Organic reverse osmosis membrane 50 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:

  • 50 Gallons per day (15.8 Liters per Hour) capacity
  • 99% Stabilized salt rejection (Minimum Rejection 97%)
  • NSF/ANSI standard 58 listed
  • Operating Conditions Performance specifications based on 500 ppm tap water, 50psi (0.35 MPa) applied pressure, 77°F (25°C) feed water temperature, pH 7-8, and 15% recovery. Element permeate flow may vary ± 15%.
  • Maximum operation pressure: 125 psi (0.86 MPa)
  • Maximum feed flow rate: 2 gpm
  • Maximum operating temperature: 113° F (45° C)
  • Maximum feed water turbidity: 1 NTU
  • Maximum feed water SDI (15min): 5
  • Chlorine tolerance: 0
  • Feed water pH range: 2-11
  • Minimum brine flow to permeate flow ratio: 4:1

Aquasky rot-4 replacement filters - Set Of 3 Cartridges

  • Set Of 3 Original organic replacement filters cartridges under sink reverse osmosis water systems aquasky ROT 4.

    This 3 stage aquasky ROT-4 RO systems uses a


    1- Sediment pre-filter usa made .

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

    3- Organic RO membranes 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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