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High-efficiency reverse osmosis system removes up to 99.99% of 90 contaminants, including fluoride, arsenic, chlorine, and lead.
UP TO 58% OFF REVERSE OSMOSIS SYSTEMS
New Product
New and improved! Instantly remove up to 99.99% of 78 contaminants from tap water. Features 44% faster water flow for ultimate hydration.
UP TO 60% OFF 3-STAGE MAX FLOW SYSTEMS
New Product
Get immediate access to healthier water with 78 contaminants reduced. Includes a Sediment Pre-Filter and 20% more capacity.
UP TO 57% OFF 3-STAGE UNDER SINK SYSTEMS
New Product
Tackle 78 contaminants and instantly transform ordinary tap water into cleaner, extraordinary water
UP TO 52% OFF 2-STAGE UNDER SINK SYSTEMS
Advanced Claryum® Technology = Healthy, Delicious Water
Our tested and certified Claryum® filtration removes the most contaminants while retaining naturally occurring beneficial minerals to turn ordinary tap water into extraordinary water.
PEACE OF MIND
Ion exchange and sub-micron filtration tackle heavy metals like lead and mercury, along with asbestos and cysts.
OUT WITH TOXINS
Activated carbon removes PFAS, microplastics, pharmaceuticals, herbicides, pesticides, VOCs, and more.
WHOLE HEALTH
Catalytic carbon filters chlorine and chloramines from the water you drink and the air you breathe.
OPTIMAL HYDRATION
Selective filtration retains healthy minerals like calcium, magnesium, and potassium for purely delicious, filtered water.
Replacements
Replace your filters regularly to keep clean, healthy water flowing.
WATER FOR LIFE®
Replacement filters auto-delivered to you — for less.
15% off filter replacements, an extended limited warranty, and free shipping — no contract required. That's Water for Life®.
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Hear from people who love Aquasana
Healthy living starts with healthy water
Discover all the ways cleaner, filtered water improves your well-being.
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Healthier Water
With exposure to environmental toxins on the rise, filtering your water is essential.
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Better Taste
We all need to drink more water. It’s easier if it tastes better.
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Softer Skin & Hair
Treat yourself to the ultimate self-care experience by bathing in water free from harsh chemicals.
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Easier Breathing
Improve indoor air quality by filtering out chemicals that evaporate and contaminate the air you breathe.
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Protected Home
Lessen sediment and scale-build up that can wreak havoc on your pipes and appliances.
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Eco-Friendly
Reduce your carbon footprint by minimizing your reliance on single-use plastic water bottles.
Enjoy Healthier, Better-Tasting Water with Aquasana's Under Sink Water Filters
Aquasana's under sink water filtration systems provide a powerful, convenient solution for cleaner, great-tasting water — straight from your tap. Compared to pitcher filters and bottled water, our filters remove significantly more contaminants while saving counter and fridge space. They also help reduce plastic waste by eliminating the need for single-use plastic water bottles, making them a more sustainable choice for your home and the planet.
Why Choose an Under Sink Water Filter?
Installed directly beneath your sink and connected to your water line, these filters deliver a continuous flow of filtered water without the hassle of refilling or slow drip filtration. Whether you're cooking, filling water bottles, or hydrating your pets, you'll have easy access to clean water whenever you need it.
Municipal water is typically treated with chlorine or chloramines, but many other contaminants can still make it through. Aquasana's under sink water filters are designed to address these additional threats to your health — including lead, PFAS (specifically PFOA/PFOS), pesticides, microplastics, and more.
Aquasana Under Sink Water Filters Remove 15x More Contaminants Than the Leading Pitcher Filters
Our Claryum® filtration technology is tested and certified to remove up to 99.99% of 78 contaminants — 15x more than the leading pitcher filter — all while keeping the beneficial minerals that naturally occur in water like potassium and magnesium. Our SmartFlow® Reverse Osmosis system goes even further, leveraging both Claryum® and reverse osmosis technology for even more comprehensive protection and up to 99.99% of 90 contaminants removed.
Certified Performance You Can Trust
All Aquasana under sink water filters are independently tested and certified to reduce chlorine, chloramines, PFAS (“Forever Chemicals”), microplastics, VOCs, pharmaceuticals, and more. Each system comes with a Limited Warranty and a 90-Day Satisfaction Guarantee to ensure your confidence and peace of mind.
Choose the Best Under Sink Water Filter for Your Home
Each Aquasana under sink filter is tailored to meet specific needs. Here's a quick comparison of our filters:
- SmartFlow® Reverse Osmosis: Our most powerful under sink water filter removes up to 99.99% of 90 contaminants including fluoride and arsenic. Combines Claryum®, reverse osmosis, and SmartFlow® technology for maximum performance and efficiency.
- Claryum® 2-Stage: Removes up to 99.99% of 78 contaminants such as chlorine, PFAS, lead, and microplastics.
- Claryum® 3-Stage: Removes up to 99.99% of 78 contaminants and includes a pre-filter to tackle sediment and rust.
- Claryum® 3-Stage Max Flow: An upgraded version of the 3-Stage model, now with a 44% faster flow and extended 800-gallon filter life.
- Claryum® Direct Connect: An easy-to-install system that connects to your existing faucet — great for renters or DIYers — with the same proven Claryum® contaminant removal of up to 99.99% of 78 contaminants.
Easy Installation and Maintenance
Each under sink water filtration system includes step-by-step installation guides and video tutorials. Filter replacements are quick and easy but will vary in frequency depending on the use and the system purchased. For more information on how often to replace components within our under sink water filters, check out our under sink filter replacement page
If you have additional questions about our under sink water filtration systems, installation, replacement, or our products in general, please contact us for customer support.