#1 Home Improvement Retailer

Internet #204406453

Model #THD-4000W

Premium Counter Top Water Filter System in White

  • Drastically reduces odors and contaminants in tap water
  • Treats the equivalent of 4000 16 oz. water bottles
  • Backed by a 1-year limited manufacturer warranty
  • See More Details

Product 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 or wait for a drip pitcher again. This water filter system provides the healthiest, best-tasting water by selectively filtering more contaminants like lead, chlorine, chloramines and cysts while preserving beneficial minerals like calcium, potassium and magnesium. Aquasana gives you exceptional value, with water costing as little as ten cents a Gal. 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 oz. plastic bottles.
  • Aquasana drinking water filters reduce more contaminants at the best value
  • Attaches in minutes to your existing tap and takes only a small space on your counter
  • Latest model featuring easy-change cartridges, a reinforced housing and a new diverter
  • Unique claryum filtration technology is certified to filter over 60 different types of water contaminants including: chlorine, chloramines, particulates, mercury, lead, volatile organic compounds and 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 standards 42 and 53 for the reduction claims specified on the performance data sheet
  • Stylish, sleek design fits with any decor style
  • Also available in black

Info & Guides

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BrandAquasanaHome MasterHome MasterMatterhorn
NamePremium Counter Top Water Filter System in WhiteHome Master Jr F2 Counter Top Water Filtration SystemHome Master Jr F2 Counter Top Water Filter System in Black10-Stage Mineralized Alkaline Countertop Filter in Clear
Contaminants FilteredLead, ChlorineChlorine, FluorideChlorine, FluorideLead, Chlorine, Copper, Iron
House Hold Size3-4 people8+ people8+ people3-4 people
Filtration MethodCarbon BlockActivated Alumina,Coconut Shell Carbon,GAC,SandActivated Alumina,Coconut Shell Carbon,SandKDF
IncludesFilter,HardwareFilter,Hardware,Installation kit,SpoutFilter,Hardware,Installation kit,SpoutInstallation kit
View ProductView ProductView ProductView Product



Fitting size (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Application Type
Water Treatment
Bacteria Reduction (%)
Chlorine reduction (%)
Contaminants Filtered
Lead, Chlorine
Copper Reduction (%)
No additional features
Filtration Method
Carbon Block
Fitting style
Fluoride Reduction (%)
House Hold Size
3-4 people
Iron Reduction (%)
Lead reduction (%)
Maximum feed water pressure (psi)
Maximum feed water temperature (F)
Maximum filtered water flow (gallons per min.)
Minimum feed water pressure (psi)
Minimum feed water temperature (F)
Number of filters included
Number of Stages
2 Stage
Pack Size
Product Type
Filter System
Product Weight (lb.)
Replacement Filter Type
Countertop Replacement Filters
Water Filtration System Type
Counter Top

Warranty / Certifications

Certifications and Listings
NSF Listed
Manufacturer Warranty
1 Year

Questions & Answers


What color , the blue or white, tubing goes into the connector plugs on convertor?

Asked by piano lady January 5, 2021

Hello, Thank you for contacting us. I have provided the instruction manual down below for installation of the system if you have any further questions please contact us at 866-662-6885. https://cdn.aquasana.com/assets/AQ-4000_Install.pdf?_ga=2.124845834.1499470051.1609952472-773233525.1590676156 Thank you, Aquasana Customer Support

My faucet does not have a screw/unscrew capability and is installed with a pullout hose/faucet. Will this still be compatible? Do you have other attachments?

Asked by AndyM November 30, 2020

Hello Andy, We appreciate your question. The only faucets the AQ-4000 water filtration system will not be compatible with are the 2-in-1 faucets that have a detachable sprayer at the faucet opening. The AQ-4000 will fit most standard faucets and also comes with two adapters. Unfortuatnely, we do not carry any other attachments that will fit a 2-in-1 faucet. -Aquasana

looking for O - Ring replacement for undersink AQ- 4000.

Asked by dan b November 23, 2020

Hello, Unfortuatnely, replacement parts for the AQ-4000 are not available to purchase directly from our online store. We kindly ask you to contact our team directly at 866.662.6885 and our friendly representatives will be more than happy to discuss warranty options and process the order needed. -Aquasana

Replacement filter is not working. No water is coming out after replacing filter?

Asked by cecenck October 18, 2020

Hello, We would love to transfer this to a team specialist who is best-suited to answer any questions or concerns you may have. Kindly email us directly at support@aquasana.com or contact us directly at 866-662-6885, Monday thru Friday from 8am-5pm CST. Thank you, Aquasana Customer Support

I just ordered a countertop filter, how tall is it

Asked by Petcoon September 28, 2020

About 9.5"

Removes rust?

Asked by john do September 19, 2020

Hello, Thank you for your question. The AQ-4000 is NSF Certified Claryum® filtration technology independently tested and proven to remove over 97% of chlorine and chloramines. Also reduces: Heavy metals like lead and mercury https://cdn.aquasana.com/assets/AQ-4000_Performance_Data.pdf?_ga=2.25726133.927680204.1600694812-773233525.1590676156&_gac=1.247744117.1600780583.CjwKCAjwwab7BRBAEiwAapqpTK9F_uyGJH5scBTHS3TtzoqW1ddaO_uU6t1tNtrnnRRv-sG8VhjOHxoCOq4QAvD_BwE If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Customer Support

Hi, When you get water for life, how long is the extended warranty for.  Thank you

Asked by fred.sill September 4, 2020

Good Morning, Thank you for reaching out to us. Once you have enrolled into our water for life program T has a free sign up and you can cancel at any time. Water for Life ensures you the best discounts with 15% off replacement filters, free shipping and no taxes included. The Water for Life also gives you an extended warranty for the products you purchased, the warranty is for as long as you are enrolled in water for life. Per the extended warranty there’s no cost for warranty replacement parts in the even that your system stops functioning due to damage or wear. A small shipping fee of $4.99 will be applied for warranty parts. If you have any further questions please contact us at 866-662-6885. Thank you, Customer Support

Can you get adapters for different tap attachments? Our tap doesn’t screw from the inside, but the outside. And do you ship to NZ?  Thanks 

Asked by Sarah Jane July 18, 2020

To my knowledge, the unit comes with an adaptor for both inside and outside threads on your faucet.

Can you directly drink the water that's filtered from AQ-4000 or do we still need to boil the filtered water?

Asked by Jack208 July 9, 2020

Good Morning, After filtering the water with our system it is safe to drink, no need to boil water. If you need further assistance feel free to contact us at 866-662-6885. Thank you, Aquasana Customer Support

Does it include a filter?

Asked by Texbbq July 3, 2020

Yes it does.

Premium Counter Top Water Filter System in White - page 2

Customer Reviews

  • 4.6
    out of 596 reviews
  • 95% recommend this product
Filter by:
Showing 1-10 of 596 reviews
Was skeptical, pleasantly surprised
This was incredibly easy to install and it’s easy to use. I love having filtered water at my fingertips, and we use it several times a day! This is perfect for apartment living. I did use a rubber band to loosely hold the tubing out of the way, but it doesn’t interfere in anything.
by CarrieJ
Great filter if you don't have much space
Finally have a piece of mind that contaminants have been reduced and that 'drink more water' is actually going to be better for my health!
by Rousanna
It does what you want it to do
I have been a customer for at least 4 years, and my parents even longer. I must say, I truly like the job this filtration system does. And I have attached a picture to prove it. The filter on the right is the first filter the water enters through. Then it goes into the chamber with the filter on the left. This amazes me, and has made me even more of a loyal customer.
by Natalie M
Response from Aquasana Customer CareSep 24, 2018
On behalf of Aquasana, thank you for your great feedback! We are delighted you are happy with your system. If we can ever be of assistance, please let us know!
David Sherman
Its wonderful. Clean water right from the tap. The filters are a total pain to change. I think everyone just buys a new one. I've had it for years and I still can't easily change filters.
by David The Water Drinker
simple and effective
I'm conscious about the choices I make when it comes to what I put in my body. I really like the simple and effective use of this countertop setup. It was easy to install taking anywhere from 5-15 min. The only thing I'd like to know or have is mineralization and a water structurer.
by outdoors enthusiast
works as advertised
Setup was simple with easy to follow instructions. I had it out of the box and operational in less than 5 minutes. Now I can make my coffee using tap water and it tastes great. The unit takes up very little counter space and doesn't get in the way. Water flow is reduced when using it but that's to be expected and there are no leaks
by Tiberius
5 people found this helpful
Installs Fast, Filters up to 450 gallons, Chromed Metal Faucet Fixture
The water filter by Aquasana is great in applications where you want your tap water filtered without installing a large filtration system onto your entire house water supply. Out of the box you'll get the silver plastic filter container with filters pre-installed, the chrome metal hose/faucet attachment, the hose assembly and an assortment of adapters and washers for different sinks. The parts count is low, and installation takes less than 20 minutes including flushing the filter once it's hooked up. NOTE: This filter will NOT work with the type of gooseneck faucets where the entire faucet head pulls off as a sprayer. It's important to know that before you buy it. You insert the color coded hoses into the bottom of the filter housing, then unscrew the faucet strainer and screw on the new faucet adapter/filter lines. If you can attach a hose to your faucet, you can install this filter. No plumbing experience, special parts or plumbing tools are needed. Once installed you have to flush the filter for ten minutes and then you're ready to use it for drinking water. You can only use cold water with this filter. Hot water will ruin the filters. Press the tab on the adapter and turn on the cold water. It flows at about 1/2 gallon per minute with the faucet opened all the way. It's completely silent, no odds sounds like some smaller size filters as the water is pushed through. It doesn't take long to fill a pitcher. Once the container or glass is full, shut off the water and the filter valve automatically closes for you, letting you use the regular faucet again. The filtered water is crystal clear and completely odor free. Just like water should be. Replacement filters can be found easily by searching the model number of the filter you have.
by hpiguy
31 people found this helpful
Easy to install. But it seems to have a continual drip. Overall an inexpensive basic counter filt...
Easy to install. But it seems to have a continual drip. Overall an inexpensive basic counter filter for my travel trailer.
by Ella
I was hoping I could stop shlepping gallons of reverse osmosis water from the store, especially during covid lockdown, but I am not satisfied with the taste of the water. I have countertop aquasana filtration and found there was no change in total dissolved solids in tap water after filtration. I must say our tap water here in suburban Minneapolis is truly awful and virtually everyone buys drinking water. I was used to reverse osmosis drinking water and prefer the taste. But I am sold on the Aquasana water being cleaner and better for you and continue to use it for making tea/coffee, rice or pasta, rinsing berries and making lemonade. But for a straight glass of water, I'm still shelpping.
by Coke feh!
Works great!
I've had this filter for about one year now. I've had no issues with leaking and my water is so crispy fresh, I can't believe it. And NYC is supposed to have the cleanest water but when I compare the non-filtered to the filtered, the Aquasana is clear and doesn't have the cloudy appearance nor the little white particles that the tap water has floating in it. I have a suggestion for the people who are hesitant in purchasing this because some folks said it leaks. My friend has this unit as well and is always moving the unit around which loosens the the tubing which makes her unit leak. I leave mine in the same place, out of the way from the day to day, and I have not had any issues with this leaking and it's been one year. I move it to clean the counter so you can move it around, just be gentle.
by Kimberly615NYC
Showing 1-10 of 596 reviews