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: Oil Rubbed Bronze
  • all-metal brushed nickel faucet
  • all-metal chrome faucet
  • oil rubbed bronze faucet
OptimH2O® Reverse Osmosis - Oil Rubbed Bronze is rated 4.2 out of 5 by 268.
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  • MSRP: 399.99
  • Sale: 187.00

Save 53% + free shipping with Water for Life $187.00

Questions? We can help

  • 866-662-6885
  • 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:

  • 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


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

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

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

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

Targets chlorine and chloramines (chlorine + ammonia disinfectant).

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 Best Tasting Water Install was fairly straightforward. The water produced is absolutely delicious and our family can't stop drinking it!
Date published: 2020-05-18
Rated 5 out of 5 by from Excellent water taste, great value! The taste of the water exceeds my expectations! My handyman installed it. So I can't comment on ease of install. The hardest part for me was waiting for 24 hour rinse to be done so I could taste the water. But wow! So delicious. Worth the wait. And great buy on sale at $199. Incredible value. Couldn't be happier.
Date published: 2020-05-08
Rated 5 out of 5 by from Great tasting water. Great tasting water. No more bio film. Very happy with this purchase. Easy to install. Wish we had bought it sooner
Date published: 2020-04-29
Rated 5 out of 5 by from OptimH2O Reverse Osmosis We have had our Reverse Osmosis system for about a month now. My wife and I are huge into health and keeping our immune system healthy and strong. Taking 95% of Fluorite out of the water plus all the other metals is very important to us. The corona virus is now in full force and the only way to fight it is to be healthy and your water is the start of building your immune system. The install was basic and the unit looks really nice. The only word of advise for people installing it them selves would be how you cut the lines to prevent water leaks. I used a par of scissors to cut the lines and at each spot I did that I had water leaks. I took them all apart and used a brand new razor blade and got a very clean and straight cut and then had no water leaks. We had another system and I thought the water tasted good until we installed this unit, the water with the Aquasana is absolutely amazing. Best water I've ever had. I used to always have to drink my water with ice and get it really cold and that is what I've done for 20 years and now I find myself drinking right out of the faucet with no ice.
Date published: 2020-04-06
Rated 5 out of 5 by from Awesome! We all absolutely love this filtration system. It provides delicious water. It has great pressure and fills a glass in seconds. And honestly the mini faucet is too cute BUT it is super practical having a separate one.
Date published: 2020-03-31
Rated 5 out of 5 by 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 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 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
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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 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.

  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 Clean Water Machine 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

We are on the 24 hours of running the water to initiate the system. We are halfway in and the water had only been trickling most of the time. Is this to be expected?

Asked by: Emily C
Your RO faucet might not be completely closed. Twist to your right. 
Answered by: Artz
Date published: 2020-05-27

How much space is needed under kitchen sink?

Asked by: Anonymous
My space is very small hard to work with and yet it fit fine with space left over for under sink supplies. The system works Beautifully, can’t imagine being without it. Hope this helps
Answered by: Breen
Date published: 2020-05-19

why is the faucet draining water all the time? Is it normal?

Asked by: ROBNY
Robny, We are sorry to hear you are experiencing issues with your system. 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: 2020-05-14

Can we order this without the faucet? we have a matte black faucet and would like to get a separate filter faucet to match.

Asked by: Alyx
i wasn't able to order it without the faucet, but i did use my regular faucet when i installed the RO system. On cold water it was filtered water and on on the hot side it was regular water. The benefit is that the hot water ran much faster because Reverse Osmosis pushes the water out much more slowly and at my house because hot water takes a minute to get to that faucet, you could get cold water out of the hot side of the faucet for a minute at higher pressure.
Answered by: hammer34
Date published: 2020-05-11

We have a whole house well system. Do you make a portable system for travel trailer?

Asked by: Denzel S
Denzel, Thank you for contacting us. We do not currently make a portable whole home system however, please check out our counter top systems. https://www.aquasana.com/countertop-drinking-filters If you have any further questions contact us at 866-662-6885. Thank you, Aquasana Customer
Answered by: Aquasana S
Date published: 2020-05-06

Is there a fee to get water for life Also does the optimh20reverse osmosis and claryum for $187 include all the filters

Asked by: Molly
Molly, Thank you for contacting us. There is no fee for our water for life program. The system does come with the set of filters when purchased. If you need further assistance contact us at 866-662-6885 to help further assist. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-04-22

Do you have it in black

Asked by: Lisy
Lisy, Thank you for your question. Unfortunately we do not have the system in the color black at the moment. If you need further assistance feel free to contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-04-22

I have quartz counter tops. 1 hole for my current faucet. How do I use your system? Will it hook up to my faucet or am I going to have my countertops replaced or pay someone to drill a secondary hole for your faucet...so I will have 2 faucets

Asked by: Additional work?
Yes you will have two faucets. You will pay someone to drill a second hole for the Aquasana faucet. 
Answered by: pkb5
Date published: 2020-04-21
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