Drinking Water Filter
OptimH2O^® Reverse Osmosis + Claryum^®

The OptimH2O Reverse Osmosis + Claryum combines premium filtration technology and reverse osmosis for optimum healthy and hydration. The only proven water filtration method to effectively remove fluoride plus 87 additional contaminants.

Tested & proven to remove 5X more contaminants than other RO systems

Select a faucet finish: Brushed Nickel

OptimH2O Reverse Osmosis - Brushed Nickel

another view of the OptimH2O Reverse Osmosis

another view of the OptimH2O Reverse Osmosis

another view of the OptimH2O Reverse Osmosis

another view of the OptimH2O Reverse Osmosis

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OptimH2O® Reverse Osmosis - Brushed Nickel is rated 4.2 out of 5 by 259.

50% OFF REVERSE OSMOSIS SYSTEMS - limited time!

Questions? We can help

866-662-6885
MON–FRI: 8AM–7PM CDT
SAT: 9AM–5PM CDT

Whole Health

Ultimate Purity*

Aquasana OptimH2O Reverse Osmosis + Claryum delivers the best drinking water available for optimal hydration.

This is the first reverse osmosis system of its kind to pair powerful reverse osmosis filtration with Claryum selective filtration PLUS remineralization.

Remove the most contaminants from your water while maintaining the benefits of healthy minerals other reverse osmosis systems simply remove.

OptimH2O Reverse Osmosis + Claryum removes:

our reverse osmosis filters 5 times more contaminants

For a complete list of contaminants reduced please see our Performance Data Sheet.

Whole Health

Goodbye
Fluoride

Remove over 95% of fluoride without demineralizing your water for optimally healthy, clean water.

Reverse Osmosis is the only proven water filtration method on the market to effectively remove fluoride from regular tap water.

Whole Health

Healthier
Drinking Water

Remineralizes water to put back the healthy minerals lost in the reverse osmosis process like calcium, magnesium, and potassium.

Improves water pH balance for optimally alkaline drinking water.

Pure Performance

Reverse Osmosis + Claryum^® Technology + Remineralization

Reverse
Osmosis Filters out dissolved solids smaller than 1 micron like fluoride and arsenic.

Activated
Carbon Reduces organic chemicals like herbicides, pesticides, VOCs and MTBE.

Catalytic
Carbon Targets chlorine and chloramines (chlorine + ammonia disinfectant).

Ion
Exchange Filters heavy metals like lead and mercury.

Absolute Sub-Micron Filtration Captures asbestos and chlorine resistant cysts like giardia and cryptosporidium.

Remineralization Puts back healthy minerals to improve pH balance & water alkalinity.

The result: Effectively removes >95% of fluoride plus 87 additional contaminants and puts back healthy minerals for optimal drinking water.

Pure Performance

Easiest filter Replacement

Replacements engineered for ease. Eco-friendly carbon and Claryum filter housings easily twist off so replacing your filters is a snap!

Pure Performance

Ultra Fast

Aquasana OptimH2O Reverse Osmosis + Claryum features a reliable flow rate to deliver optimally clean, healthy water fast!

0.5 GPM

How It Works

Superior Filtration

Reverse osmosis reduces 14 impurities including fluoride, nitrates, nitrites, lead, radium and arsenic.†

Selective Claryum^® Filtration reduces 74 contaminants including chlorine, chloramines, heavy metals, pesticides, and herbicides.

Remineralization designed to provide healthy amounts of calcium, magnesium and potassium for optimally alkaline, pH balanced water.

certified by NSF

Tested and Certified to NSF/ANSI Standards 42, 53, 58, 401 + P473 in model AQ-RO-3 for the claims specified on the Performance Data Sheet

1 year RO membrane life^**
1 year remineralizer life^**
6 month carbon/ Claryum filter life
2 year warranty
90 day guarantee

** Capacity depends on water quality and usage.

Help & Support

Video Help

How to install the under counter reverse osmosis system
How to replace the membrane cartridge and the remineralizer in the AQ-RO-3

Installing the RO under counter system

Replacing the membrane cartridge and the remineralizer in the AQ-RO-3

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Product Information

Daily Production (DPR): 13.32 gallons
Operating Pressure: 40-100 psi
Operating Temperature: 40-100 F

Manifold Dimensions: 12" × 4.5" × 12.5" (L × W × H)
Tank Dimensions: 16" × 11" (H × Diameter)

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Warranty & Installation

Previously-sold AQ-RO-3 Install Instructions (Chrome Faucet)

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Read the Reviews

Rated 5 out of 5 by Tejinder from Highly recommended, bottled water from home I researched quite a few RO filter systems and decided to buy Aquasana based on online reviews. My wife can tell the taste of tap water and I was sick of buying bottled water (cost and plastic waste). Installed this with the help of a plumber and I’m highly satisfied customer. My wife can’t tell the difference between water from this filter and bottled water (except maybe Smart water) with a blind test. I’m not worried about clean Drinking water at home ever now. Replace filter cartridge at recommended frequency and you’ve clean drinking water!!!

Date published: 2020-03-24

Rated 5 out of 5 by Caitlin from Love this Filter! Removes microplastics This filter provides a good flow of tasty filtered water. It is one of the few filters certified to remove microplastics, which are prevalent in all water supplies in the USA sadly. For the health of my family I ordered this. It took my husband some trial and error to install, so maybe easier to hire a plumber, but in the end he got it right and it works beautifully. The water tastes great, the flow is perfect, and I feel much safer using this for my family's drinking water. I've been recommending it to my family and friends.

Date published: 2020-03-19

Rated 5 out of 5 by Water connoisseur from Love it Installation was a little tricky, we had several leaks at the beginning due to hoses not being pushed in completely! Once that was figured out, the system has been great! We bought this system to replace our counter top zero water filter and have been happy we did. Aquasana’s customer service is also fantastic! They helped me out quickly over the phone and email!

Date published: 2020-03-06

Rated 5 out of 5 by STEVEo77 from Don’t hesitate I use for baby formula and drinking. Great TX company. My professional background is actually water treatment and sanitary sewer‘s. Are use this primarily for baby bottles and for drinking as I hate paying for disposable plastic bottles I like reusing to lower my landfill footprint . The north Texas municipal water District does a chlorine burn every year in the system did a great job of illuminating the chlorine stink and amount in our water. I actually got the water tested and professional lab and it’s amazing what a great job it does. Just because the EPA says your water safe doesn’t mean it’s good. I should’ve upload some photo The north Texas municipal water District does a chlorine burn every year and this system did a great job of illuminating the chlorine stink and amount in our water. I actually got the water tested and professional lab and it’s amazing what a great job it does. Just because the EPA says your water safe doesn’t mean it’s good. I should’ve uploaded some photos of our last filter change I’ll do it when I get a chance don’t hesitate this is a great product the flow is a little bit slow and you have to keep that in mind but it does a great job.

Date published: 2019-07-28

Rated 5 out of 5 by John Tesh from Easy Installation & Works Properly The process to install is easy if you have any type of ability with plumbing or you are good with handy work. You can increase the flow rate by adding a larger tank or buying an additional RO tank.

Date published: 2019-05-25

Rated 5 out of 5 by Gregory Landry from Very good product but cheap fittings This product works great but I really wish they would upgrade all the fittings. I would be willing to pay more for gettwe quality. But, would I buy this again? Absolutely. I'm using this on a dug well in Maine where the water is relatively good. But, this product absolutely made the water better all around.

Date published: 2019-05-17

Rated 5 out of 5 by Natalia from Best tasting water!!! We installed whole house filter and the OptimH2O RO system ourselves Instructions were complete and there was also a video to help if needed. We are very pleased with the taste and quality. As far as the water itself, it's clear, no bad smell to it, and it taste good. We’ve had the system installed for a couple of months now and we are really enjoying the system and great tasting waster.

Date published: 2019-05-11

Rated 5 out of 5 by DrVille from Glad we finally switched to RO We used the standard under counter filter for many years, but wanted something to remove the fluoride. After looking at all of the options, we decided to go with the Reverse Osmosis system. It works great! The re-mineralizer adds back in all of the important minerals that come out with the fluoride and the water tastes great - even better than before. A couple of the reasons that we waited so long to make the switch to RO were concerns about installation and having a more complicated system. Both have turned out to be no big deal. The install was about the same as the standard under counter system and only took about an hour or so. And the system itself has worked flawlessly. We can hear it draining the waste water occasionally and that's about it. Overall, we would highly recommend the Aquasana RO system.

Date published: 2019-03-26

Rated 5 out of 5 by TripleGGG from Great Value for a Drinking Water System Works as advertised. Water tastes great and appears to be crystal clear.

Date published: 2019-03-12

Rated 5 out of 5 by Jess the new home owner from User friendly Having hard water with ‘floaters” was concerning. I appreciate the system being relatively easy to install, the quality or the water, as well as the affordability. Not being a multimillionaire, and being able to get a quality system was impressive. My only recommendation would be to watch the installation video as well as reading the guide

Date published: 2019-01-08

OptimH2O® Reverse Osmosis - Brushed Nickel Reviews - page 2

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Aquasana FAQs

Do I need a plumber to install the system or can I install it myself?

Depending on your existing skills and experience, we recommend hiring a professional to install your reverse osmosis system. Installation does require drilling into your pipes which is not recommended for individuals unfamiliar with plumbing and permanent appliance installation. Please read through the owner's manual carefully before attempting to install the system. If you have any questions or need assistance, our technical support representatives at 866-662-6885 can walk you through the installation process.
How often do I have to replace the cartridges and membrane?

• Stage 1 (Carbon) and Stage 3 (Claryum) filter cartridges should be replaced every 6 months or 365 gallons. To make replacements easier and cheaper, these cartridges are eligible for our Water for Life auto-ship program. Get free shipping, the best discounts, and an extended product warranty by joining Water for Life.
• We recommend replacing Stage 2 (RO Membrane) every 2 years depending on usage and water quality. For homes with higher water usage and/or poorer water quality, you may need to replace your RO membrane every 1 to 2 years. For homes with lower water usage and/or better water quality, you may only need to replace your RO membrane every 2 to 3 years.
• We recommend replacing the remineralizer every 1 year depending on usage and water quality.
Is this purified water?

Yes. The Aquasana OptimH2O uses reverse osmosis to effectively purify your drinking water. In addition to reverse osmosis, the OptimH2O system also uses selective filtration to reduce over 70 other contaminants, plus includes a remineralizer designed to put back healthy minerals like calcium, magnesium, and potassium that are removed in the reverse osmosis process.
I'm a renter, so I can't drill or modify the plumbing. What should I do?

Unfortunately, drilling into your water pipes is required to install the Aquasana OptimH2O Reverse Osmosis system. If you already have an existing hole for a vegetable sprayer or soap dispenser on your sink countertop, our AQ-5200 and AQ-5300 Under Counter Drinking Water Systems can be installed without making permanent changes to your sink and are great options for rental properties. If there is not an existing hole on your sink countertop, we also have two countertop options that offer the same professional grade filtration as our under counter options (please see the Powered Water Filtration System or AQ-4000).
I have an existing filtration or side faucet from a previous system. Can I use that with my new Aquasana water filter?

The faucet included with the Aquasana OptimH2O is specifically designed and NSF tested and certified to work with our reverse osmosis system — any other Aquasana faucet or faucet from another filtration system not designed to work with a reverse osmosis system will not work for the Aquasana OptimH2O and may cause damage to your filtration system. If you choose to use another reverse osmosis air gap faucet, we recommend you enlist the help of a plumber to ensure proper installation.
Why is it important to flush my OptimH2O Reverse Osmosis System during the initial installation?

When RO membranes are manufactured, there is a preservative used to protect the membrane fibers from damage. This preservative needs to be flushed out after the system is installed and prior to drinking water from the RO system. In addition, the RO holding tank should be sanitized with a drop of bleach during the install. It is important to flush the system for the entire 24 hours during the initial install to ensure all the bleach from the holding tank is washed away before consumption.
What does TDS mean?

TDS is the acronym for Total Dissolved Solids, the amount of dissolved minerals and metals present in water. TDS meters tell you the concentration of dissolved minerals and metals, but are not an accurate measurement for contamination. Aquasana products reduce and remove harmful TDS like lead, but selectively retain or replace healthy dissolved solids like calcium, magnesium, and potassium. Aquasana OptimH2O comes standard with a 1 year remineralizer designed to replace healthy calcium, magnesium, and potassium lost in the reverse osmosis process.
Does the Aquasana OptimH2O remove fluoride?

Yes. The Aquasana OptimH2O is NSF Certified to remove over 95% of fluoride from your drinking water.
Does the Aquasana OptimH2O remove arsenic?

Yes. The Aquasana OptimH2O is NSF Certified to remove over 97% of arsenic from your drinking water.
How many gallons does the RO holding tank store?

The RO holding tank stores 3.2 gallons of water at a time.
What is the flow rate of the Aquasana OptimH2O?

OptimH2O flows at a rate of 0.5 gpm (gallons per minute).

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User Q & A

Does Aquasana offer a 6 stage RO system? I am coming across the 3 stage one. Any advantages of the 3 stage over the others?

Asked by: Nadia83

I am sorry! I don't know about a 6 stage RO system. I am using a 3 stage system. The Aquasana support team can help you about it. Good luck!

Answered by: Duc Tru

Date published: 2020-03-26

What place in the world is this being shipped from?

Asked by: Zimbozim

Somewhere from United States of America.

Answered by: M @ DIY enthusiast.

Date published: 2020-03-14

Can I use my own kitchen faucet? And do you sell it without the faucet?

Asked by: Yared

You can use your own water faucet. It just needs to be able to connect all 3 lines to it. Not sure if they will sell a kit with no faucet.

Answered by: jthames

Date published: 2020-03-13

How do you install this if there is already an existing air gap for the dish washer in the one hole there is. There aren't any other holes to use for the new water faucet. Making another hole is not an option as it is a Kohler ceramic sink. Thanks

Asked by: Yared

Unfortunately, drilling into your water pipes is required to install the Aquasana OptimH2O Reverse Osmosis system. If you already have an existing hole for a vegetable sprayer or soap dispenser on your sink countertop, our AQ-5200 and AQ-5300 Under Counter Drinking Water Systems can be installed without making permanent changes to your sink and are great options for rental properties. If there is not an existing hole on your sink countertop, we also have two countertop options that offer the same professional grade filtration as our under counter options (please see the Powered Water Filtration System or AQ-4000). Thank you, Aquasana Support

Answered by: Aquasana S

Date published: 2020-03-14

does someone come and install the system also?

Asked by: Gurinder

Thank you for your e-mail. We are the manufacturer and distributor but we do not have installation technicians in the field. We do work with a network of plumbers across the US who are familiar with and/or certified to install our systems. If you would like to know if there is anyone in your area, please email us at Support@aquasana.com with your city, state, and zip code. We look forward to hearing from you! Thank you,

Answered by: Aquasana S

Date published: 2020-03-12

Can this be installed in an apartment I rent?

Asked by: Emmy

Hello, Unfortunately, drilling into your water pipes is required to install the Aquasana OptimH2O Reverse Osmosis system. If you already have an existing hole for a vegetable sprayer or soap dispenser on your sink countertop, our AQ-5200 and AQ-5300 Under Counter Drinking Water Systems can be installed without making permanent changes to your sink and are great options for rental properties. If there is not an existing hole on your sink countertop, we also have two countertop options that offer the same professional grade filtration as our under counter options (please see the Powered Water Filtration System or AQ-4000). If you have any further questions please contact us at 866-662-6885 to help further assist. Thank you, Aquasana Support

Answered by: Aquasana S

Date published: 2020-03-05

I already have the aquasana whole house filter.  What additional benefit would an RO system provide?

Asked by: AnnMarie with fluoride

Hello, We would love to transfer this to a team specialist who is best-suited to answer any questions or concerns you may have. Kindly email us directly at support@aquasana.com or contact us directly at 866-662-6885, Monday thru Friday from 8am-6pm CST, and weekends from 9am-5pm CST. Thank you, Aquasana Support

Answered by: Aquasana S

Date published: 2020-03-05

How often do you have to replace filters?

Asked by: Marcela

Hello, Stage 1 (Carbon) and Stage 3 (Claryum) filter cartridges should be replaced every 6 months or 365 gallons. To make replacements easier and cheaper, these cartridges are eligible for our Water for Life auto-ship program. Get free shipping, the best discounts, and an extended product warranty by joining Water for Life. • We recommend replacing Stage 2 (RO Membrane) every year depending on usage and water quality. For homes with higher water usage and/or poorer water quality, you may need to replace your Remineralizer every year. Thank you, -Aquasana Support

Answered by: Aquasana S

Date published: 2020-03-05

OptimH2O® Reverse Osmosis - Brushed Nickel Questions - page 2