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Made in the USA since 1980
The most effective water purification available.
Aquathin's patented reverse osmosis plus deionization (RO/DI) process removes what ordinary filters leave behind. Pure water, straight from your tap.
- EPA registered
- ISO 9001:2015
- 7 patents
Find the right system for your water.
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Under the sink
Pure water from a dedicated faucet.
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Countertop & portable
No plumbing needed. Ideal for apartments, dorms and travel.
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Whole home
Softening and filtration for every tap.
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Commercial & lab
Ultra-pure water for clinics, labs and hospitality.
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Filters & parts
Replacement cartridges, membranes and faucets.
Our most-loved systems
Every system is built on the same patented purification process.
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Aqualite RODI
Our flagship under-sink purifier, with patented auto-flush to protect the membrane.
Price to be set
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Kitchen Top (KT90)
Countertop RO/DI purification with no plumbing or electrical work.
Price to be set
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PortAbout Classic RO/DI Traveler
The same purity in a portable case for travel, dorms and RVs.
Price to be set
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Replacement filter pack
Keep your system at 0 ppm with annual filter changes.
Price to be set
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75% of the earth is covered by water.
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About 75% of the human body is made of it.
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Aquathin purifies 100% of it.
Two technologies. One patented process.
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1 Pre-filtration
Carbon and sediment stages remove chlorine, chemicals and particles.
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2 Reverse osmosis
A high-rejection membrane removes dissolved salts, metals and microorganisms.
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3 Deionization
A final polishing stage removes what reverse osmosis alone leaves behind.
Not all water filters are purifiers.
We rated nine treatment technologies on 20 water-quality measures. Here are five of them.
View the full Tech Ratings| Aquathin RO/DI | Ordinary RO | Carbon filter | |
|---|---|---|---|
| Cysts | A+ | F | F |
| Arsenic | A+ | B- | F |
| Nitrate | A+ | C | F |
| Pesticides | A+ | C | A- |
| Total dissolved solids | A+ | B | F |
Built to last decades, not seasons.
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Minimal maintenance
Most systems need one filter service a year.
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The finest warranty in the industry
And we live up to it. The Golden Guarantee
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Service reminders from the factory
Every owner gets a free annual reminder to have their system checked.
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Trained professionals
Authorized dealers are certified through Aquathin University.
Three generations of Aquathin families
Read more stories →
Owned since 1988
Milwaukee went through a terrible cryptosporidium outbreak some years ago. We had no issues using the water from our Aquathin unit for drinking and cooking. No water boiling.
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Owned since 2011
“On one occasion heavy rains flooded our well pump and our water was yellow. The water coming out of the AquaLite line was crystal clear and perfect.”
Nancy M., Silverton, OR Aqualite -
18 years
“Once I checked this local water using a TDS meter (160 PPM reading), I knew that we were dealing with very hard water. But after we installed it, it started producing water with practically 0-2 PPM reading!”
George V., Myrtle Beach, SC Kitchen Top KT90
Backed by the Golden Guarantee.
Our products make the purest drinking water possible. If you can find a system within 30 days after your purchase with the same features and benefits, lifetime warranty, and the purest water, we will gladly refund your money and buy you their system.
