UNDER SINK WATER FILTERS

Drink with confidence.
Our award-winning under sink filters remove up to 99% of 88 contaminants to instantly transform ordinary tap water into clean, healthy water.
Select where you want filter
UP TO 58% OFF UNDER SINK SYSTEMS UNTIL APR 19
  • Delayed Shipping
Faucet Finish: Brushed Nickel
Brushed Nickel Chrome Oil Rubbed Bronze

SALE PRICE $224.99 $499.99 MSRP
Water For Life Price
$224.99 55% OFF + Free Shipping!
Combines Claryum® and reverse osmosis technology to remove 88 contaminants including fluoride and arsenic.
55% OFF REVERSE OSMOSIS SYSTEMS
  • Delayed Shipping
Faucet Finish: Brushed Nickel
Brushed Nickel Chrome Oil Rubbed Bronze

SALE PRICE $167.99 $399.99 MSRP
Water For Life Price
$167.99 58% OFF + Free Shipping!
Remove up to 99% of 77 contaminants, plus sediment. Now with 44% faster water flow for ultimate hydration.
58% OFF 3-STAGE MAX FLOW SYSTEMS
Top Rated
  • Delayed Shipping
Faucet Finish: Brushed Nickel
Brushed Nickel Chrome Oil Rubbed Bronze

SALE PRICE $129.99 $299.99 MSRP
Water For Life Price
$129.99 57% OFF + Free Shipping!
Immediate access to clean, healthy water. 77 contaminants reduced, plus a Pre-Filter to tackle sediment and rust.
57% OFF 3-STAGE UNDER SINK SYSTEMS
  • Delayed Shipping
Faucet Finish: Brushed Nickel
Brushed Nickel Chrome Oil Rubbed Bronze

SALE PRICE $99.99 $199.99 MSRP
Water For Life Price
$99.99 50% OFF + Free Shipping!
Reduce 77 contaminants and instantly transform ordinary tap water into clean, extraordinary water.
50% OFF 2-STAGE UNDER SINK SYSTEMS
Patented Claryum® Technology = Healthy, Delicious Water
Our independently-certified Claryum® filtration removes the most contaminants while retaining naturally-occurring beneficial minerals to turn ordinary tap water into extraordinary water.
bubble-image
PEACE OF MIND
Ion exchange and sub-micron filtration tackle heavy metals like lead and mercury, along with asbestos and cysts.
Activated carbon removes pharmaceuticals, herbicides, pesticides, PFOA/PFAS, VOCs, and more.
Catalytic carbon filters chlorine and chloramines from the water you drink and the air you breathe.
Selective filtration retains healthy minerals like calcium, magnesium, and potassium for purely delicious filtered water.
See the full list of contaminants filtered
As seen in
Good Housekeeping
Martha Stewart
This Old House
Mens Health
Replacements
Replacements
Replace your filters regularly to keep clean, healthy water flowing.
WATER FOR LIFE®
Replacement filters auto-delivered to you — for less.
No contract, 15% OFF filter replacement, an extended warranty and free shipping. That's Water for Life®.
Learn More
Don't just take our word for it
I am extraordinarily amazed at the quality of water I am tasting, since installing the OptimH2O Reverse Osmosis. I thought we had great water but I can definitely taste the difference. I don't taste chemicals nor any residual aftertaste. Highly recommend!
STEFANIE - EASTCHESTER, NY
We are enjoying our new filter. It was an easy install, we just used our soap dispenser hole in our granite countertops. Getting rid of bottled water was a priority. We are looking forward to realizing the health benefits of our new product. It was also important for us not to be wasting any incoming water with the use of the filter, and this product does just that.
JIM & JANE - EDMONTON, AB
I love it so much I bought one for the entire family!
RUBESCUBE - FORT WORTH, TX
I have been a long time user of Aquasana products and they work very well. I upgraded to this larger capacity filter because we use the filter for all of our drinking and cooking needs. It does a great job of improving the water quality and the higher flow rate is a plus. Thanks for a well-engineered product.
CANENDS - TRAVERSE CITY, MI
I am completely satisfied with my Aquasana water filter. The water tastes better than bottled water.
ROBBIE - LOS ALAMITOS, CA
I love my new water filter system. It was very easy to install and it was reasonably priced. Great quality and easy instructions. Thanks much!
WINGNUT - CODY, WY
Aquasana — an immediate difference in every drop
microscope

Max Contaminant Removal

Industry-leading results for your peace of mind.

water-drop

Nothing Added

No chemicals are added to your water during the filtration process.

star-rating

The Reviews Are In

15,000+ five-star reviews from customers just like you.

speaker

You Talk, We Listen

Your feedback drives our product innovation.

Under Sink Water Filters for Healthy, Great-Tasting Water

Under sink water filters are a popular way to get healthier, better-tasting water because they remove more contaminants than most pitcher-based options and even bottled water. Additionally, using an under sink filtration system enables you to instantly enjoy clean water straight from the tap without waiting or taking up valuable counter/fridge space.

Clean, healthy water is essential. After all, you use water for so much — from washing produce to watering plants to filling your family's glasses (and Fido’s bowl!) at dinner. The majority of municipalities use chemicals such as chlorine and chloramines to treat drinking water for bacteria, but the process can miss other contaminants that may be detrimental to your health. This is why we recommend installing a water filter under your sink, on your countertop, or for your whole house.

Compared to most pitcher filters, Aquasana’s under sink water filters reduce 15x more contaminants. In fact, our NSF tested and certified Claryum® filtration technology removes up to 99% of harmful contaminants including mercury, fluoride, lead, asbestos, and others.

Choose the Best Under Sink Water Filter for Your Home

Aquasana offers several under sink water filtration systems to fit the unique needs of your home, and many include a dedicated faucet that dispenses filtered water.

To help determine the best under sink water filter for your home, start by reading your water quality report and consider what level of filtration you’ll need to reduce contaminants in your area. Our OptimH2O® Reverse Osmosis + Claryum® offers our most powerful filtration, but we also offer several other under sink water filters that are great at reducing contaminants.

OptimH2O® Reverse Osmosis + Claryum® Filter

The OptimH2O® Reverse Osmosis + Claryum® Filter stands in a league of its own when it comes to effectively removing contaminants. This powerful under sink water filter features the only filtration method proven to significantly reduce the presence of 88 harmful contaminants including 95% of fluoride and mercury, 99% of lead and asbestos, and 97% of chlorine along with several other potential tap water hazards.

It should be noted that some reverse osmosis (RO) systems are so efficient at filtering that they also remove healthy minerals, impacting the taste and health benefits of your water. However, our remineralization technology restores a good pH balance—along with calcium, magnesium, and potassium to ensure your drinking water contains vital minerals, has optimal alkalinity, and tastes great.

  • Claryum® 2-Stage : Reduces the presence of 77 harmful contaminants including lead and mercury
  • Claryum® 3-Stage : Removes up to 99% of lead & 76 other contaminants
  • Claryum® 3-Stage Max Flow : An upgraded version of the Claryum® 3-Stage, now featuring a 44% faster flow rate and 800 gallons of filter life
  • Claryum® Direct Connect : An easy to install, fast-flowing water filter that connects directly to your existing faucet and removes up to 99% of 77 harmful contaminants

All of these under sink water filters are tested and certified to reduce chlorine, chloramines, herbicides, pesticides, pharmaceuticals and more in your tap water.

If you prefer a countertop water filter, our systems use NSF certified Claryum® filtration technology proven to remove up to 99% of lead, asbestos, chlorine, chloramines, and 73 other harmful contaminants.

How to Install and Replace Our Under Sink Water Filters

Each under sink water filtration system comes with its own detailed step-by-step installation instructions in addition to a video guide to help simplify the setup process. Replacements are quick and easy, but will vary in frequency depending on use. For more information on how often to replace components within our under sink water filters — check out our under sink and countertop filter replacement page.

If you have additional questions about installation, replacement, or our products in general—please contact us for customer support.