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 to filter
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OPTIMH2O® Reverse Osmosis + Claryum®
MSRP$399.99Sale $187.00Maximum removal of 88 contaminants including fluoride and arsenic.
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Claryum® 3-Stage Max Flow
MSRP$349.98Sale $174.99Remove up to 99% of 77 contaminants, now with 44% faster water flow.
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Claryum® 3-Stage
MSRP$285.70Sale $129.9977 contaminants reduced, plus a pre-filter to tackle sediment and rust.
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Claryum® 2-Stage
MSRP$199.99Sale $99.99Reduce 77 contaminants for clean, healthy water.
Claryum® Direct Connect
Easy to install, fast-flowing filter connects directly to your existing faucet to reduce 77 contaminants.
Introducing the new Claryum® Direct Connect
- Certified to remove up to 99% of 77 contaminants for your peace of mind
- Fast, DIY install using the faucet you already own
- Clean, filtered water as easy as turning on your cold water
- Eco-friendly filter replaces 6,250+ plastic water bottles
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.
List of Contaminants
Our patented Claryum® technology reduces 77 contaminants – that’s 15x more than the leading gravity pitcher filter – all while retaining beneficial minerals to give you the best-tasting, healthiest water.
- Water treatment & disinfectants
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- Chlorine
- Chloramines
- Brxomodichloromethane (THM)
- Chlorodibromomethane
- Bromochloroacetontrile
- Dichloroacetonitrile
- Solids
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- Particulate
- Turbidity
- Asbestos
- Biological
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- Cysts (Cryptosporidium & Giardia)
- Metals
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- Lead pH 6.5
- Lead pH 8.5
- Mercury pH 6.5
- Mercury pH 8.5
- Chemicals (Industrial Solvents, Flame Retardents, Glue, Paint, etc.)
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- MTBE
- Bisphenol A (BPA)
- Nonylphenol
- TCEP
- TCPP
- PFOA & PFOS
- Benzene
- Carbon Tetrachloride
- Chlorobenzene
- o-dichlorobenzene
- p-dichlorobenzene
- 1, 2-dichloroethane
- cis-1, 2-dichloroethylene
- trans-1, 2-dichloroethylene
- 1, 2-dichloropropane
- Ethylbenzene
- Dibromoacetonitrile
- Trichloroacetonitrile
- 1,1-dichloro-2-propanone
- 1,1,1-trichloro-2-propanone
- Hexachlorobutadiene
- Hexachlorocyclopentadiene
- Styrene
- 1,1,2,2-tetrachloroethane
- Tetrachloroethylene
- Toluene
- 2,4,5-TP (Silvex)
- Tribromoacetic Acid
- 1,2,4-Trichlorobenzene
- 1,1,1-Trichloroethane
- 1,1,2-Trichloroethane
- Trichloroethylene
- Bromoform
- Chloroform
- Xylenes
- Herbicides, Pesticides, Insecticides, Fumigants
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- DEET
- Linuron
- Metolachlor
- Alachlor
- Atrazine
- Carbofuran
- Chloropicrin
- 2,4-D
- Dibromochloropropane (DBCP)
- cls-1, 3-dichloropropene
- Dinoseb
- Endrin
- Ethylene Dibromide (EDB)
- Heptachlor (H-34, Heptox)
- Heptachlor Epoxide
- Lindane
- Methoxychlor
- Pentachlorophenol
- Simazine
- Pharmaceutical
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- Atenolol
- Carbamazepine
- Estrone
- Ibuprofen
- Meprobarmate
- Naproxen
- Phenytoin
- Trimethoprim
Goodbye, Contaminants
Nothing Added
Better Performance & Value
Eco-Friendly
Easy to Use
Goodbye, Contaminants
Tested and certified to remove chlorine/chloramines, taste & odor, lead, cysts, pesticides, VOCs, and more for maximum protection for your family.
Nothing Added
With Aquasana, rest easy knowing that no chemicals are added to your water during the filtration process.
Better Performance & Value
Filter 15x more contaminants and get 20x more capacity than with the leading gravity pitcher filter.
Eco-Friendly
Designed with the environment in mind, our filters feature minimal disposable parts for reduced plastic waste.
Easy to Use
Engineered for straightforward installation and filter replacements. Because clean water doesn’t have to be complicated.
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 replacements, an extended warranty, and free shipping. That’s Water for Life.
Aquasana — an immediate difference in every drop
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Max Contaminant Removal
Industry-leading results for your peace of mind.
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Nothing Added
No chemicals are added to your water during the filtration process.
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The Reviews Are In
15,000+ five-star reviews from customers just like you.
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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® Filter 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.
water for life
Replace your filters on time, without worry — auto delivered to you, for less.
Free Shipping
Replacements shipped directly to you, right when you need them, at no extra cost.
Discounted Replacements
Lock in a 15% discount on filters to ensure you always get the best price.
Extended Warranty
Our performance promise to you – free replacement parts, just in case.
No Contract
Replacing your filters is serious – but your commitment doesn't have to be.