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
  • all-metal brushed nickel faucet
  • all-metal chrome faucet
  • oil rubbed bronze faucet
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
another view of the OptimH2O Reverse Osmosis
another view of the OptimH2O Reverse Osmosis
another view of the OptimH2O Reverse Osmosis
‹
›
OptimH2O® Reverse Osmosis - Brushed Nickel is rated 4.3 out of 5 by 243.
  • y_2019, m_5, d_21, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.12
  • cp_1, bvpage1
  • co_hasreviews, tv_12, tr_231
  • loc_en_US, sid_309, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getAggregateRating, 5.52ms
  • REVIEWS, PRODUCT
50% OFF REVERSE OSMOSIS SYSTEMS - limited time!
  • MSRP: 399.99
  • Sale: 199.99

Save 50% + free shipping with Water for Life $199.99

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–6PM CDT
  • SAT–SUN: 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:

  • 95% fluoride and mercury
  • 97% chlorine and chloramines
  • 99% lead, asbestos and arsenic
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

Learn More

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)

Learn More

Read the Reviews

Rated 5 out of 5 by 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 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 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 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 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
Rated 5 out of 5 by from Great Product - Piece of Mind Just recently moved to an area where the city water is not the best quality so we bought water from the store for drinking and cooking. To remedy the situation I installed a whole house filter and the OptimH2O RO system and we are very pleased with the taste and quality. I had the whole house system installed by a professional plumber and I installed the RO system myself. It was very easy to do the install. Instructions were complete and there was also a video to help if needed.
Date published: 2019-01-04
Rated 5 out of 5 by from Excellent product!! By far the best water filtration system we have tried.
Date published: 2018-12-30
Rated 5 out of 5 by from Excellent I was able to install the filter with no problems and no leaks. As far as the water itself, it's clear, no bad smell to it, and it taste good. I don't drink a lot of water by itself but the coffee taste very good and is smooth. No complaints from my dog either. Without having the water tested for any contaminants I am hoping the filter is doing it's job.
Date published: 2018-12-30
Rated 5 out of 5 by from We are enjoying the great water. We are enjoying the system and great tasting waster.
Date published: 2018-12-26
Rated 5 out of 5 by from Love It I’ve had the system installed for a couple of months now and I am really enjoying it. Although it is not advertised to provide 9.5 pH or higher, it’s holding its own with the Essentia water I use to purchase. I bought a water testing kit and tested it for five times over the last couple of months and consistently have a reading above 10.0 pH. I have the under sink system along with the whole home system. I’m not sure of having both systems helps to produce such fabulous results but I’m very happy. I did have some issues with installation and having the plumber come out a couple of times to troubleshoot why there was so much noise when the tank refills. It turned out the plumber failed to install the water flow restrictor. The Aquasana team was great about diagnosing the issue and even sending out a replacement flow restrictor when we realized the plumber threw it out. The only down side is the faucet could not be installed very tightly. So long as no one slams it on or off it has not been a problem. I also had to have a hole drilled into my countertop in order to have the system installed.
Date published: 2018-12-23
  • y_2019, m_5, d_21, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.12
  • cp_1, bvpage1
  • co_hasreviews, tv_12, tr_231
  • loc_en_US, sid_309, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getReviews, 3.67ms
  • REVIEWS, PRODUCT

Learn More

Aquasana FAQs

  1. 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.

  2. 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.

  3. 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 60 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.

  4. 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).

  5. 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.

  6. 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.

  7. 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.

  8. Does the Aquasana OptimH2O remove fluoride?

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

  9. Does the Aquasana OptimH2O remove arsenic?

    Yes. The Aquasana OptimH2O is NSF Certified to remove over 97% of arsenic from your drinking water.

  10. How many gallons does the RO holding tank store?

    The RO holding tank stores 3.2 gallons of water at a time.

  11. What is the flow rate of the Aquasana OptimH2O?

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

Learn More

User Q & A

Does the tank have to be empty before it re-fills, I find that I'm always running out of water. Is this normal? I thought the system would continually replenish the water supply in the tank.

Asked by: Thirsty in Arizona
The tank automatically keeps itself full. It is slow about refilling so you might be using the water faster that it can replenish what was used.
Answered by: jthames
Date published: 2019-05-19

does it remove salt from water softener ?

Asked by: Ramiro
Simple answer is Yes. Reverse osmosis can remove those impurities from your already-softened drinking water –including 98 percent of all sodium left in the water from the softening process. 
Answered by: RonGDallas
Date published: 2019-05-01

Hello.I need exact dimensions of the tank, I'm not sure it's going to fit under the counter

Asked by: Benjamin Peleg
Hello, We are glad to assist. The Reverse Osmosis Manifold Dimensions are: 12" × 4.5" × 12.5" (L × W × H) If further assistance is needed, please contact our support team at 866.662.6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-04-29

hi! can these unit be installed up side down? i have a cabin that is not winterized and i drain the water system to prevent freeze damage. also would they drain near completely in that orientation?

Asked by: nicknock
Hello, It appears you have several questions that would best be answered by a consultation with one of our experts over the phone. Please call our customer service department at 866-662-6885, to discuss a potential solution for your home. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-04-29

The AQ-RO-3 system installed for 2 months. Today suddenly water came out from the faucet air gap and flooded the countertop. I pressed the hole and water stopped leaking and forced to go back to the drain. Why & how to avoid it happen again?

Asked by: Flai
We had the exact same issue. Cust support told us to check for debris inside the red tubing that’s connected to the drain/garbage disposal. It was clogged, so we cleaned out the tubing and haven’t had any problems since. 
Answered by: 4Cats
Date published: 2019-04-27

I was wondering if the expansion tank can be installed in my basement directly Below the sink cabinet Rather then taking up the room under the sink. 

Asked by: Chid
The included lines are meant for going under the sink. If you were to relocate the tank, you might have to get different lines
Answered by: Allan
Date published: 2019-04-19

Will I need to drill a hole in my countertop for the faucet head? If so, is that something a plumber does? 

Asked by: Alison
Yes.  What kind of countertop do you have?  Mine is laminate so I just drilled the hole myself.
Answered by: ebp1
Date published: 2019-04-19

I would like to capture and save the waste water to water my plants and lawn. What size container would I need if I emptied it each time it went through the draining process?

Asked by: Eileen P.
Hello, It appears you have several questions that would best be answered by a consultation with one of our experts over the phone. Please call our sales department at 866-662-6885, options 1 and 1 to discuss a potential solution for your home. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-03-22
  • y_2019, m_5, d_21, h_23CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.12
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_253
  • loc_en_US, sid_309, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 3.96ms
  • QUESTIONS, PRODUCT

Related Products

OptimH2O Reverse Osmosis Stage 1 & 3 Filter Replacements

OptimH2O Reverse Osmosis Stage 1 & 3 Filter Replacements
  • MSRP: $64.99

OptimH2O Reverse Osmosis Stage 2 RO Membrane Replacement

OptimH2O Reverse Osmosis Stage 2 RO Membrane Replacement
  • MSRP: $59.99

Shower Filter with Handheld Wand

Shower Filter with Handheld Wand
  • MSRP: $99.99
  • Sale: $54.99

18 oz Aquasana Glass Water Bottles - 6 Pack

18 oz Aquasana Glass Water Bottles - 6 Pack
  • MSRP: $18.99