Drinking Water Filter
OptimH2O™ Reverse Osmosis + Claryum®

Reverse Osmosis plus Claryum® Filtration Technology for optimum health and hydration: the only proven water filtration method to effectively remove fluoride.

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
OptimH2O Reverse Osmosis - Brushed Nickel is rated 4.5 out of 5 by 105.
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50% OFF REVERSE OSMOSIS SYSTEMS until Oct 23
  • 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: 9AM–5PM CDT

Whole Health

Ultimate Purity*

Aquasana OptimH2O delivers the best drinking water available for optimal hydration.

OptimH2O 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 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 over 70 other 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 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 65 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

Installing the RO under counter system

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)

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Read the Reviews

Rated 5 out of 5 by from good system, good customer service! I did a lot of research on what the best option for a water system would be for us, and finally chose this one. I watched the "how to install" right here at this website and between that and the instruction booklet that came with the system, got it installed. The one thing that threw me off was the hole in the back of the faucet. Once I supplied water to the system, this faucet began to make noise and dribble a few drops of water out the back. I turned every thing off and called the toll free number. Customer service was great. They explained the faucet is designed that way and also explained that one line going from the faucet to the drain pipe should have NO sag in it at all. Mine had a gentle U shaped slope to it. They assured me that would fix the issue. I didn't understand how making a minor adjustment to the line (easy to trim off a few inches) would work. But it did! The system works great! Good flow rate. Wonderful, sweet tasting water. It is so nice to know if I have any issues or questions, helpful customer service is only a phone call away. Bottom line - LOVE this system! Goodbye buying bottled water - hello filtered water in my home!
Date published: 2017-10-17
Rated 5 out of 5 by from Better than advertised Our family has used the refrigerator's built-in water filter for years, but I could still taste the impurities of our tap water, even with a new filter installed. Once we purchased and installed the Aquasana RO under sink unit, we immediately noticed the clarity and purity of the water. The entire family is noticing improvements in our health within the first 2 weeks of use. Thank you! Great quality product.
Date published: 2017-10-11
Rated 4 out of 5 by from Filter itself = great the connection components that come with the RO system are horrible plastic. Be prepared for trip(s) to the hardware store. Once installation is complete, filter is great.
Date published: 2017-10-04
Rated 4 out of 5 by from Great Water The unit was fairly easy to install. I had a little trouble finding a good location to place the tank and filters.After it was installed and checked all the lines for leaks the water came out great tasting.
Date published: 2017-10-04
Rated 5 out of 5 by from The Best Tasting Water from this system! I purchase and easily installed this water filter, and have enjoyed it. My water is so fresh and clean, and the price for this unit was simply unheard of. It is well worth the money! Great product
Date published: 2017-09-29
Rated 5 out of 5 by from I love my water filter! I bought this a month or two ago and couldn't be happier. The water tastes great and the tap looks beautiful. Aquasana is a great company and I would order again!
Date published: 2017-09-28
Rated 5 out of 5 by from Convenience It is good knowing I'm not putting chemicals in or on my body. We Love the convenience of having filtered water on hand all the time!
Date published: 2017-09-28
Rated 1 out of 5 by from Poor quality Horrible product, made of plastic. About to return it.
Date published: 2017-09-26
Rated 5 out of 5 by from Water taste great We had a skilled plumber/handy man install the system with no issues. The water taste very smooth, clean, and fresh. After filling up about 1.5 gallons the water pressure slows down a lot so I just give it a break for a few minutes and let the pressure build up again.
Date published: 2017-09-25
Rated 5 out of 5 by from Excellent product I have a whole house system and the reverse osmosis system under sink and I love these products! Thank You Aquasana! I also purchased a second reverse osmosis system for my son!
Date published: 2017-09-23
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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 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

I have a portable dishwasher that hooks up to my sink faucet. Is it possible to turn off the filter while my dishwasher is running so that I can use the filters only for drinking?

Asked by: Anonymous_M
Thank you for your question. This system will utilize a separate beverage faucet, so it should not have any affect on your main faucet or portable dishwasher. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-12

Hi, which is the shipping weight with the box?????

Asked by: Delta
Hello! This system weighs about 20 pounds Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-12

We have installed this system around April this year. It was working fine until a week ago. It does not produce drinking water at all. There is a small amount of water on the faucet (about few table spoon) please help to identify and correct the problem

Asked by: Ozzy23
Hello! I'm sorry to hear that your system is not flowing properly. Please contact our service team at 866.662.6885 and we will assist in troubleshooting. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-12

I am interested in buying OptimH2O but it is not equipped with UV light. Can I install a separate UV light to work with this system?

Asked by: edongski
Hello, Thank you for your interest in Aquasana! We do not currently have a point of use system that can be fitted with a UV, but we do offer a whole home UV filter that can be purchased individually, or with a whole home filtration unit. Please give us a call at 866.662.6885 if you would like more information on any of our systems and we will be happy to help. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-12

What psi does the purified water come out at in this system?

Asked by: Rioleck
Hello! OptimH2O flows at a rate of 0.5 gpm (gallons per minute). Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-12

does OptimH2O Reverse Osmosis - Brushed Nickel remove chromium-6 or specific model remove chromium-6 ?

Asked by: Bill Li
Thank you for your question! The Reverse Osmosis system is NSF certified to reduce 97% of chromium 6. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-11

Does this system remove micro plastics

Asked by: Ronnie
Thank you for your interest in Aquasana! Microplastics are small plastic particles in the environment. While there is some contention over their size, the U.S. National Oceanic & Atmospheric Administration classifies microplastics as less than 5 mm in diameter. They can come from a variety of sources, including cosmetics, clothing, and industrial processes. 5mm = 5000 microns. Aquasana drinking filters are certified by the NSF to remove contaminants down to 0.5 microns, and the Reverse Osmosis system reduces to .001 microns. However, while our filters remove many of the known contaminants that make up various microplastics, our systems have not been certified specifically for the term “microplastics.” Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-16

Osmosis reverse H2O Optimum: for the filter, do you have a Absolute pore size of 1 micron or smaller? Thank you

Asked by: carole
Thank you for your question. All of our drinking water filters are rated at .5 microns. Additionally, the membrane of a RO system is 0.001 microns. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-11
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