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The Best Under-Sink Water Filter

Updated Dec 11, 2022
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Anyone who goes through more than a couple of gallons of drinking water a day will probably be happiest with an under-sink filtration system like the Aquasana AQ-5200. If you prefer (or need) filtered water, this provides a continuous supply of it on demand from a separate tap. We recommend the Aquasana AQ-5200 because its certifications are among the best of any system we’ve found.

Aquasana AQ-5200, exceptional, affordable under-sink filtration

Aquasana AQ-5200

Exceptional, affordable under-sink filtration
Certified for the most contaminants, widely available, affordable, and compact, the Aquasana AQ-5200 is the under-sink water filter system we’d look for first.
We recommend
A.O. Smith AO-US-200, same performance, different name

A.O. Smith AO-US-200

Same performance, different name
Identical to the Aquasana AQ-5200 in certifications, specs, and size, the A.O. Smith AO-US-200 is exclusive to Lowe’s, so not as widely available.
Another good choice
Aquasana AQ-5300+ Max Flow, higher flow and capacity

Aquasana AQ-5300+ Max Flow

Higher flow and capacity
With the same great certifications but a higher flow rate and filter capacity, the AQ-5300+ works for homes that use a lot of water—but it costs a bit more and takes up more space under the sink.
A better upgrade
Aquasana Claryum Direct Connect, high water flow, easy installation

Aquasana Claryum Direct Connect

High water flow, easy installation
The Claryum Direct Connect installs without drilling and delivers up to 1.5 gallons of filtered water per minute through your existing faucet.
Another good choice

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