The Aquasana Reverse Osmosis (RO) Water Filter System carries NSF 42, 53, and 58 certifications and is certified by NSF to remove 74 contaminants. Aquasana uses their “Claryum” filtration technology to remove chlorine and chloramines, VOC’s including TTHM’s, lead, mercury, MTBE; and the RO filter to remove arsenic, fluoride, nitrate and nitrite, radium 226/228, and the other “RO only” contaminants.
Made in the USA.
Why NSF Certifications are Important
If you are evaluating other Reverse Osmosis water filter systems, be sure to ask if the filters have certifications for 42, 53 & 58 by NSF which is an independent third party tester. Also, ask for a copy of the test report. The report will show you what percentage of each contaminant the filter removes.
Some systems aren't as effective as others. We selected this RO system as the best because it had three certifications by a third party and the test results were better than other systems tested. We've read hundreds of test reports and this filter's results really stood out. View the test report at the bottom of this page.
This RO System Remineralizes Your Water
Some have expressed concern that the effectiveness of RO filters causes them to remove some desirable minerals such as calcium, magnesium, and potassium from your drinking water.
To counteract this, Aquasana includes a “remineralization” component after the RO filter that adds these desirable minerals back into your filtered water.
Reverse Osmosis filter systems offer the highest level water filtration available for home use. In addition to the activated carbon filters, a Reverse Osmosis system employs a Thin Film Composite (TFC) membrane capable of removing many toxic contaminants other methods cannot, such as Arsenic (pentavalent), Barium, Fluoride, Nitrate and Nitrite, Perchlorate, Radium 226/228, and Selenium. Reverse Osmosis filters carry their own, specific NSF certification, 58. The best systems and the only ones you should consider will also have NSF certifications 42 and 53, and remove all of the key contaminants we have been tracking in our previous filters.
Because of the science behind Reverse Osmosis, these systems require a separate holding tank (2-5 gallons) that you will need space for, and also produce waste water so they will need to be tied into your drain. Most systems come with “quick-connect” attachments making DIY installation possible, but it will be more involved than a regular under the counter filter and you will probably need a plumber. It's typically a 1-2 hour job.
Filter Life: 6 months-2 years
Filter Cost: $23.99-$64.99
Filter Media: carbon, ion exchange/RO
Flow Rate: 0.5 GPM
Have more questions? Call us at 1-800-221-5109 or email us.