Trusted Shops Banner

Aquasana AQ-4000 Countertop Water Filter System in White

Out of Stock
Free UK Next Working Day Delivery
Free UK Next Working Day Delivery

Product Description


After devoting 18 months to redesigning and reformulating the company's filter cartridges, Aquasana has created its most powerful and best-performing filtration systems to-date. Unique in both design and functionality, the new Aquasana Claryum™ Filtration Technology features three distinct stages, including activated carbon, ion exchange and sub-micron filtration. Together, this unique combination forces water under pressure over more than two million square feet of surface area of contaminant-grabbing filtration material — the equivalent of almost 35 football fields. In addition to reducing a comprehensive list of chemicals and contaminants, Claryum's™ patent-pending selective filtration technology reduces odour and improves the taste of tap water while also preserving its healthiest minerals such as calcium, potassium and magnesium for optimum hydration — which are vital for growth, development and overall health and wellness.

At the touch of a button, Aquasana AQ-4000 Water Filter System transforms tap water into naturally healthy, great tasting drinking water!

Get the best water at a fraction of the cost of bottled water.  Aquasana's exclusive dual filter system uses a combination of carbon filtration, ion exchange and sub-micron filtration to produce truly healthy, great tasting water at the convenience of your kitchen tap

The patented twin cartridge drinking water filter installs in seconds to standard kitchen faucets and provides up to 30 gallons an hour of ultra-filtered high quality water for drinking, cooking and other beverages. Includes filter housing‚ chrome faucet diverter‚ twin filter cartridge set (lasts 6 months/filters 500 gallons), easy to follow instructions and cartridge re-order forms.

Replacement filters available to buy separately (AQ-4035)

If you would like to install this system under the counter you can purchase the AQ-4050 Undersink Conversion Kit

AQ-4000 Highlights

  • Compact design (7"Wx9"Hx4"D)
  • Installs in seconds
  • AQ-4000 Dual-Filter Drinking Water System includes 2 filter cartridges, chrome faucet adapter & instructions.
  • Reduces up to 99% Chlorine, Lead, Mercury, VOC's, THM's, MTBE and 100 other common tap water contaminants!
  • Sub-Micron Filtration
  • Filters out 99.99% of Cryptosporidium and Giardia (chlorine resistant parasites)
  • Leaves in the natural trace minerals
  • Improves taste and smell
  • Lasts up to 500gallons or 6 months
  • Removes Turbidity  
  • Better than bottled water quality!
  • Made in the US
  • Voted Best Buy for water filter by Consumers Digest
  • Aquasana is the #1 rated home water filtration system in America

Remove pollutants, maintain healthy minerals

The unique twin cartridge, three-stage filtration system uses a combination of carbon filtration, ion exchange, and sub-micron filtration. Your tap water is forced under pressure over filtration material covering more than two million square feet of surface area. So it reduces over three times more contaminants than leading pitcher filter brands.



Cartridge A

  •     Filters sediment and turbidity Reduces microscopic particles
  •     Improves taste
  •     Greatly reduces odor
  •     Filters chlorine Chlorine is the most concentrated and competitive chemical in tap water

Cartridge B

  •     Filters lead and mercury Ion exchange reduces heavy metals
  •     Maintains pH levels
  •     Improves taste
  •     Filters synthetic chemicals Herbicides
  •     Pesticides
  •     Industrial solvents
  •     .5-micron absolute filtration Removes cysts

Your water becomes contaminated from a variety of sources throughout the process of collection, treatment and delivery. From groundwater contamination at the source to chemical contamination at the treatment facility to rust and lead contamination as the treated water travels through pipes to your home, the water you drink and bathe in can contain dangerous levels of harmful contamination. This continuing level of contamination makes filtering your water a critical component of maintaining your health. With the AQ-4000 Countertop water filter, Aquasana Claryum™ filtration technology stands between you and the harmful contamination present in your water supply.



Additional Product Information


* Please note the AQ4000 filtration system will only be compatible with a tap that comes with a removable aerator at the tip of the tap

Product Reviews

  • 5
    Amazing & Affordable

    I have heard about Aquasana in - the independent news website. I must admit the water looks and tastes much better. I used to purchase Brita cartridges but Aquasana is much better system. The installation can be tricky, although it looks so simple. Just need to remember to use all parts in the box! I have been using the filer for a few days, but can confirm the green tea and coffee taste much better. Strongly recommend.

    Posted by Izabela on 15th Mar 2017
  • 5
    Perfect Water Filtration System

    This is a very good water filtration system that connects directly to your existing tap which avoids the need to instal a separate tap and not also that expensive compared to other water filtration systems available on the market.

    Posted by Philip on 26th Sep 2016