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Aquasana Countertop Drinking Water Filter System, White

4.1 4.1 out of 5 stars 935 ratings

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Material
Plastic
Capacity
2400 Liters
Included Components
Countertop Filter, diverter, filters
Purification Method
Ion Exchange

About this item

  • Removes over 97% of chlorine and reduces 76 other contaminants - NSF certified to remove lead, pharmaceuticals and more
  • No waste water or harmful contaminants added to your drinking water during the filtration process
  • Retains the healthy minerals like calcium, potassium, and magnesium for the healthiest water
  • Only 11 cents per gallon - 11 times the capacity of the leading gravity-based filter pitcher
  • Easily attaches - no permanent fixtures or installation required. Filtered water right from your tap
  • No plumber required - replacements are a simple twist
  • Instantly Transform Ordinary Tap Water Into Clean, Extraordinary Water - Removes up to 99% of 77 contaminants while leaving healthy minerals so you can drink with confidence. This system will NOT reduce Total Dissolved Solids (TDS).
  • Works with faucets that have a threaded aerator and includes 13/16 and 15/16 fittings. Does not work with integrated pull-down sprayer faucets. Additional fittings available through support. Contact Aquasana at (866) 662-6885 for warranty support.

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 9 x 4 x 9.5 inches; 2.91 Pounds
  • Item model number ‏ : ‎ AQ-4000W
  • Date First Available ‏ : ‎ October 12, 2011
  • Manufacturer ‏ : ‎ Aquasana Inc.
  • ASIN ‏ : ‎ B005V08722
  • Customer Reviews:
    4.1 4.1 out of 5 stars 935 ratings

Product Description

Amazon.com

The countertop filter installs in minutes. [View Larger]Use only the healthiest water for drinking and cooking.

Overview

Transform ordinary tap water into great tasting healthy water with Aquasana’s innovative filter. Get always available, healthy water, right from your tap. No need to ever refill any drip pitchers. This water filter system provides the healthiest, best tasting water by selectively filtering more contaminants like lead, chlorine, and cysts while preserving beneficial minerals like calcium and magnesium. Aquasana gives you exceptional value, with water costing as little as ten cents a gallon when you replace your filters every six months. Each time you replace the filters, you can give yourself credit for not using 4,000 16-ounce plastic bottles.

Performance

The AQ-4000W Aquasana under counter water filter, featuring NSF-certified Claryum three-stage filtration, is ultimate convenience. Aquasana's unique Claryum filtration technology is certified to filter 60 contaminants including the following:

  • 97.4% of Chlorine, Free Available
  • 99.9% of Particulate
  • 99.9% of Cyst Live Cryptosporidium &Giardia
  • 96.6% of Mercury
  • 99.3% of Lead
  • 81.8% of Methyl Tertiary Butyl Ether (MTBE)
  • 99.0% of Turbidity
  • 99.4% of Volatile Organic Compounds (VOC)
  • 99.0% of Asbestos

For a complete list of contaminants reduced, see the Aquasana AQ-4000W Performance Data Sheet. System tested and certified by NSF International against NSF/ANSI Standard 42 and 53 for the reduction claims specified on the Performance Data Sheet.

How it Works

  • Unique twin cartridge, three-stage filtration system uses a combination of carbon filtration, ion exchange, and sub-micron filtration.
  • Tap water is forced under pressure over filtration material covering more than two million square feet of surface area.
  • Selective Claryum filtration technology removes harmful contaminants and preserves beneficial minerals like calcium, magnesium, and potassium for optimal hydration.

Compare Aquasana Drinking Water Filter Systems

ModelAQ-4000WAQ-4000BAQ-4000PAQ-4600AQ-4601.55AQ-4601.56AQ-4601.62 InstallationCountertopCountertopCountertopUnder SinkUnder SinkUnder SinkUnder SinkFinishWhiteBlackBrushed SteelChromeBrushed NickelChromeOil-Rubbed BronzeFaucet / DiverterStandardStandardPremiumStandardPremiumPremiumPremiumReplacementsAQ-4035AQ-4035AQ-4035AQ-4035AQ-4035AQ-4035AQ-4035Contaminant ReductionNSF CertifiedNSF CertifiedNSF CertifiedNSF CertifiedNSF CertifiedNSF CertifiedNSF CertifiedChlorineLeadAsbestosTurbidityMercuryCystsCryptosporidiumGiardiaParticulateBenzeneTrihalomethanesChloroform

From the Manufacturer

The AQ-4000 Aquasana countertop water filter is the most economical way to get clean, crisp, healthy water for your family. Named one of Health Magazine's Healthiest Gadgets for 2011, our countertop drinking water filter offers Aquasana's unbeatable drinking water filtration technology in a convenient, portable package. There's no need for an extra hole in your sink to enjoy healthy, filtered water. Simply attach our diverter to your existing tap, and the countertop unit takes up just a small space on your counter. Water under pressure means better filtration. Our unique twin cartridge 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 removes over three times more contaminants than leading pitcher filters. Some water filter systems strip out the healthy Total Dissolved Solids (TDS) leaving you with zero calcium, magnesium and potassium. The Aquasana water filtration system is uniquely designed to remove pollutants, reduce odor, and improve taste while preserving healthy minerals for optimum hydration. Certified contaminant reduction 97.4-Percent of Chlorine, Free Available 99.9-Percent of Particulate 99.9-Percent of Cyst Live Cryptosporidium and Giardia 96.6-Percent of Mercury 99.3-Percent of Lead 81.8-Percent of Methyl Tertiary Butyl Ether (MTBE) 99.0-Percent of Turbidity 99.4-Percent of Volatile Organic Compounds (VOC) by Surrogate 99.0-Percent of Asbestos For a complete list of contaminants reduced, see the Aquasana AQ-4000 Performance Data Sheet. System tested and certified by NSF International against NSF/ANSI Standard 42 and 53 for the reduction claims specified on the Performance Data Sheet.


From the manufacturer

Countertop Water Filtration

Instantly transforms tap water into healthy, great-tasting water with no installation or permanent fixtures.

Reduces 10x More Contaminants than the Leading Gravity Pitcher

NSF Certified Claryum filtration technology

Independently tested and proven to remove over 97% of chlorine and chloramines.

Reduces Heavy Metals

Including lead, mercury, and more.

Reduces Organic Chemicals & Pharmaceuticals

Including herbicides, pesticides and VOCs.

Removes 77 Total Contaminants

  • Lead
  • Mercury
  • Herbicides
  • Pesticides
  • Pharmaceuticals
  • Chlorine & Chloramine
  • PFOA & PFOS
  • For a full list of contaminant removal view our performance data sheet.

NSF Certified

How It Works

Activated Carbon: Reduces pharmaceuticals, herbicides, pesticides, VOCs and MTBE.

Catalytic Carbon: Targets chlorine and chloramine.

Ion-Exchange: Filters heavy metals like lead and mercury.

Absolute Sub-Micron Mechanical Filtration: Captures asbestos and other contaminants.

Easy Attachment

No permanent fixtures or installation required. Simply twist on the faucet attachment for filtered water right from your tap! No more big, bulky filters cluttering up your sink space.

Full System NSF Certified

Full system certified to NSF/ANSI Standards 42, 53, 401 + P473 to reduce 77 contaminants including lead, mercury, herbicides, pesticides, pharmaceuticals and more . The counter-top water filter will not leach contaminants back into your water.

Convenience & Value

Fewer filter replacements. More clean, great-tasting water.

One Aquasana Claryum filter gives you 11x the capacity of the leading gravity-based pitcher at only 11¢ per gallon.

Designed with the environment in mind! Intelligent system design reduces plastic waste by minimizing disposable plastic parts.

Aquasana Countertop Water Filter AQ-RO-3 Aquasana 2-Stage Water Filter 3-stage water filter 3-stage max flow water filter Clean Water Machine
AQ-4000 AQ-RO-3 AQ-5200 AQ-5300 AQ-5300+ AQ-CWM2-B
Customer Reviews
4.1 out of 5 stars
935
3.8 out of 5 stars
84
3.8 out of 5 stars
4,337
3.8 out of 5 stars
4,337
3.8 out of 5 stars
4,337
4.0 out of 5 stars
279
Product Aquasana Countertop Water Filter Aquasana OptimH2O Reverse Osmosis System Aquasana 2-Stage Water Filter System Aquasana 3-Stage Water Filter System Aquasana 3-Stage Max Flow Water Filter System Aquasana Clean Water Machine
Capacity 450 Gallons 365 Gallons 500 Gallons 600 Gallons 800 Gallons 300 Gallons
Heavy Metal Reduction (lead & mercury)
Fluoride Reduction
Flow Rate 0.5 Gallons/Minute 0.5 Gallons/Minute 0.5 Gallons/Minute 0.5 Gallons/Minute 0.72 Gallons/Minute 0.5 Gallons/Minute
Filter Life 6 months 6 months 6 months 6 months 6 months 6 Months
Installation Countertop Under Sink Under Sink Under Sink Under Sink No Installation
Replacement AQ-4035 AQ-RO-3-R AQ-5200R AQ-5300R AQ-5300+R AQ-CWM2-R

What's in the box

  • Countertop Filter, diverter, filters
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.1 out of 5 stars
    4.1 out of 5
    935 global ratings

    Customers say

    Customers like the taste, ease of installation, and performance of the water purification unit. For example, they mention it improves the taste of thewater, it's very easy to set up, and it works well. That said, some complain about the leakage and flow. Opinions are mixed on quality and value.

    AI-generated from the text of customer reviews

    109 customers mention98 positive11 negative

    Customers like the taste of the water purification unit. They say it's phenomenal, smooth, and delicious. Some say it does a good job filtering bad taste and odor out of city water, and an excellent job getting the bad tasting chlorine out of the air.

    "...The filters recommend 3mo. I went 4mo. Water still tasted good, no bleach smell. But after I replaced, breath of fresh water!Tips:..." Read more

    "...It's delicious and it is a hassle if you don't come prepared because it is a good piece of equipment, no quick fix like a pitcher but the..." Read more

    "...Which sucks, because I really like the unit I bought! The water tastes good, install was a breeze, but given all the "bait and switch" slick..." Read more

    "Great taste, convenient to have the on/off switch right on the faucet...." Read more

    97 customers mention90 positive7 negative

    Customers find the installation process of the water purification unit to be easy. They mention that it's compact and easy to place on or near the sink.

    "...All the info is there. Its easy, but you may need a wrench to replace filters. It seems to embed. Not a bad thin, keeps it from leaking...." Read more

    "...The water tastes good, install was a breeze, but given all the "bait and switch" slick marketing campaigns going on, I'm much less confident!..." Read more

    "...Installation was very easy, as the hose ends are color coded. Blue to blue and white to white...." Read more

    "...for more than 1 year now and love the flavor and how easy it is in terms of installation...." Read more

    87 customers mention71 positive16 negative

    Customers like the performance of the water purification unit. They say it works well, the filter works well and is effective. Some say that the faucet valve works great and that it doesn't need electricity to work. Overall, most are satisfied with the quality of the filtration and the water that it produces.

    "...Got the black one this time and works better than ever. I still haven't seen a better alternative to this overall...." Read more

    "...The water is fantastic, if not transformative.The 3 stars is only because the unit drips at the faucet...." Read more

    "for the cost, it works very well. the only downside for me was when...." Read more

    "The system works well, but it is extremely difficult to loosen the filter caps when it is time to replace filters...." Read more

    52 customers mention40 positive12 negative

    Customers like the quality of the water filter. They mention that it works well, filters the water very well, and makes the water drinkable. Some say that the water comes out crystal clear and tastes better than using a Brita filter. Overall, most are happy with the quality and performance of the product.

    "...I get a jug of clean fresh water inside 4 minutes. Still beats pitchers and replacing filters...." Read more

    "This aquasana water filter is superb. Much better than the Pur water filter for taste...." Read more

    "...I gave the product two stars because the filter is good and the diverter works ok until it breaks, and then you are in trouble." Read more

    "...All the info is there. Its easy, but you may need a wrench to replace filters. It seems to embed. Not a bad thin, keeps it from leaking...." Read more

    60 customers mention27 positive33 negative

    Customers are mixed about the quality of the water purification unit. Some mention that it's a good quality filter that is easy to install, and gets out all the impurities. However, others say that it has broken in the exact same way twice, and is not built very well.

    "...Also, the inside casing for the filter broke so it started leaking from the inside. I opened the outer casing to find water spraying out...." Read more

    "...a pitcher but the distinction makes it worth it because the quality is unmatched. Great buy!..." Read more

    "...- as much as I like what your product does, I'm pretty unhappy with longevity and reliability of your solution - It's cannot even lasts until first..." Read more

    "...Ran for 10 minutes as instructed. After that, just good clean water. Vegas tap water has some funky taste, but this definitely passed my taste test...." Read more

    58 customers mention34 positive24 negative

    Customers are mixed about the value of the water purification unit. Some mention that it's affordable, good, and saves money. However, others say that it is expensive, the replacement filters are a bit pricey, and it'll not last six months.

    "...Water filtering quality - most best thing about this filter2) Value (as long as it's keep working)BAD:..." Read more

    "...3. Expensive4. Not the best looking counter-top.One of the plastic hose couplers cracked. No way to fix...." Read more

    "...I would highly recommend this unit for anyone who is looking for affordable, good, tapwater...." Read more

    "...It’s well worth the price. My regular tap water is full of chemicals that downright make it hard to drink...." Read more

    61 customers mention12 positive49 negative

    Customers are dissatisfied with the leakage of the water purification unit. They mention that the connector leaked, water started pouring out of the filter, and the water is coming right through the enclosure. They also say that when they replace the filters, it doesn't always seal properly, causing the water to leak.

    "...Also, the inside casing for the filter broke so it started leaking from the inside. I opened the outer casing to find water spraying out...." Read more

    "...new "Aquasana AQ-4000W Countertop Water Filter System" - whole system is LEAKING very badly now and yes, I have read your website about "solution" -..." Read more

    "...When the filter is engaged there is a small drip of the unfiltered water (yech) that steadily dribbles into your clean water stream...." Read more

    "...The leak got progressively worse. The video attached shows the problem, but that was the brand new casing I bought last...." Read more

    28 customers mention6 positive22 negative

    Customers are dissatisfied with the flow of the water purification unit. They mention that it is very weak and the filtered water comes out slowly. Some say that the filter output is kinda slow and the flow rate is reduced when in filtering mode.

    "...Water tastes like fresh air. The filter output is kinda slow, but it has lasted far longer than the PUR filter, that cracked, and tastes better than..." Read more

    "...Almost like soft water. Only thing is, it flows slow. Not a HUGE deal, but worth noting. I timed 2 minutes to fill a 3qt container...." Read more

    "Very easy install. It does make the water flow quite slowly when you are making filtered water...." Read more

    "...I have no issues with leaks and the flow is good and has not diminished over 5 weeks...." Read more

    A little slow to dispense. No biggie
    4 Stars
    A little slow to dispense. No biggie
    (Updated 5/10/19) Time to change out filters on this countertop unit. But I have to say:I've been getting nearly weekly emails from this co. since my original purchase about a year ago. "Half off", or "Oops, we sent you a huge discount by mistake, but we'll still honor it" or "We've extended our discount for one more day"..etc..etc.. If you order direct from their website, its actually a few bucks more than through Amazon. I paid $64.71 originally through Amazon. If I follow the email spam for "half off", I'm directed to their website, where they show the original price at nearly double, and with the "half off" promo, it drops down to anywhere from $65 to $90 bucks! In fact, as of today, I can buy the exact same entire unit for $57.13, OR I can buy JUST the replacement filters for $59.99!? Huh??I feel like Aquasana is more of a marketing company than a water filtration company. Which sucks, because I really like the unit I bought! The water tastes good, install was a breeze, but given all the "bait and switch" slick marketing campaigns going on, I'm much less confident! Why are your prices SO different? Why not just offer the same item at nearly the same price across all of your seller platforms? Give or take a few bucks. I understand that Amazon might take a cut of your sales, but ordering through your own website should be just a tad less expensive? It makes me think the focus is more on marketing and web clicks, and less on good quality products.Now, that said, should I buy 2 replacement filters for $59.99, or just toss my entire current unit, plastic housing, metal fittings and tubes in the trash and buy a whole new unit for $57.21? I'm not an extreme environmentalist, but this just seems silly!! Unit arrived on time, with my prime 2 day order. Everything was present, all parts accounted for. I had to buy an adaptor from home depot, for about 8 bucks (It's the taller chrome one on the right) , as the 2 they included were not long enough to fit in my faucet. No big deal there. Install was a breeze, once I got everything tightened down, using a bit of Teflon tape. Ran for 10 minutes as instructed. After that, just good clean water. Vegas tap water has some funky taste, but this definitely passed my taste test. Almost like soft water. Only thing is, it flows slow. Not a HUGE deal, but worth noting. I timed 2 minutes to fill a 3qt container. My workaround for that is, I spent several minutes filling up my 5 gal upside-down water jugs, and placed them on my dispenser. As my pic depicts, I zip tied the tubes along the faucet so I have full swivel ability, and no kinks.Last noteworthy thing, I emailed the company to inquire how many gallons do they recommend before changing out the filters. 2 days later, I have not gotten a response. (Week days) After actually reading thru the pamphlet included, I saw it was 450 gallons. My fault, but still, I'd hoped the customer care response would come within a 24hr period or so. Let's hope I get something soon? Overall I give 4.5. If this thing goes good, I'll consider a shower unit as well.
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    Reviewed in the United States on February 1, 2018
    Customer image
    4.0 out of 5 stars A little slow to dispense. No biggie
    Reviewed in the United States on February 1, 2018
    (Updated 5/10/19) Time to change out filters on this countertop unit. But I have to say:
    I've been getting nearly weekly emails from this co. since my original purchase about a year ago. "Half off", or "Oops, we sent you a huge discount by mistake, but we'll still honor it" or "We've extended our discount for one more day"..etc..etc.. If you order direct from their website, its actually a few bucks more than through Amazon. I paid $64.71 originally through Amazon. If I follow the email spam for "half off", I'm directed to their website, where they show the original price at nearly double, and with the "half off" promo, it drops down to anywhere from $65 to $90 bucks! In fact, as of today, I can buy the exact same entire unit for $57.13, OR I can buy JUST the replacement filters for $59.99!? Huh??
    I feel like Aquasana is more of a marketing company than a water filtration company. Which sucks, because I really like the unit I bought! The water tastes good, install was a breeze, but given all the "bait and switch" slick marketing campaigns going on, I'm much less confident! Why are your prices SO different? Why not just offer the same item at nearly the same price across all of your seller platforms? Give or take a few bucks. I understand that Amazon might take a cut of your sales, but ordering through your own website should be just a tad less expensive? It makes me think the focus is more on marketing and web clicks, and less on good quality products.
    Now, that said, should I buy 2 replacement filters for $59.99, or just toss my entire current unit, plastic housing, metal fittings and tubes in the trash and buy a whole new unit for $57.21? I'm not an extreme environmentalist, but this just seems silly!!

    Unit arrived on time, with my prime 2 day order. Everything was present, all parts accounted for. I had to buy an adaptor from home depot, for about 8 bucks (It's the taller chrome one on the right) , as the 2 they included were not long enough to fit in my faucet. No big deal there. Install was a breeze, once I got everything tightened down, using a bit of Teflon tape. Ran for 10 minutes as instructed. After that, just good clean water. Vegas tap water has some funky taste, but this definitely passed my taste test. Almost like soft water. Only thing is, it flows slow. Not a HUGE deal, but worth noting. I timed 2 minutes to fill a 3qt container. My workaround for that is, I spent several minutes filling up my 5 gal upside-down water jugs, and placed them on my dispenser. As my pic depicts, I zip tied the tubes along the faucet so I have full swivel ability, and no kinks.
    Last noteworthy thing, I emailed the company to inquire how many gallons do they recommend before changing out the filters. 2 days later, I have not gotten a response. (Week days) After actually reading thru the pamphlet included, I saw it was 450 gallons. My fault, but still, I'd hoped the customer care response would come within a 24hr period or so. Let's hope I get something soon? Overall I give 4.5. If this thing goes good, I'll consider a shower unit as well.
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    43 people found this helpful
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    Top reviews from other countries

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    Eternal
    5.0 out of 5 stars Great filter and seller
    Reviewed in the United Kingdom on June 6, 2023
    Brian Swanton
    5.0 out of 5 stars It hooked up easily. Periodically I have to tighten the faucet attachment
    Reviewed in Canada on April 2, 2018
    3 people found this helpful
    Report
    Cecilia
    3.0 out of 5 stars No era en realidad lo que necesitaba
    Reviewed in Mexico on August 20, 2017
    Apfelstecher
    5.0 out of 5 stars Kompakter Wasserfilter mit gutem Preis/Leistungsverhältnis
    Reviewed in Germany on August 12, 2018
    9 people found this helpful
    Report
    hagop
    5.0 out of 5 stars good, but still i didnt test it with water
    Reviewed in Canada on February 23, 2016