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Aqua Sky - Since 1998



we'd love to hear from you

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.)

Buy online replacement filters for aquasky ROT-4 under sink reverse osmosis water systems filters , Aquasky ROT-4 under counter sink systems replacement filters for repair , Cervice  - include 3-4 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 in the aquasky ROT-4 and Post-Filters in RO systems can last around 8 To 12 months between changes. RO membranes can last as long as 2 to 3 years!

Aquasky ROT-4 Carbon Filter

$42.00 Regular Price
$33.60Sale Price
  • Stage 2 & 3 Pre-Membrane

    Stage 2 & 3 Are the same - organic ( CTO ) coconut shell carbon block filter

    • forceful remove pesticide residues in water, water pollution odor of ozone, chlorine .
    • Protects and extends the life of the membrane and system.
    • Recommend replace every 8 To 12 months.
    • Standard Size 24-3/4" / 10" 5.5 /15-( 97%)pxi - CVM
    • Tankpro Pro 3.2 & 4.4 Reverse osmosis replacement filter cartridge .
    • Aquasky Rot-4 Reverse osmosis replacement filter cartridge .
    • PA-E Reverse osmosis RO 132 Replacement carbon filter cartridge

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