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 4.3 out of 5 by 208.
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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: 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 80 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 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 reverse osmosis system water tastes fine. Had the unit professionally installed during kitchen remodel.
Date published: 2018-05-17
Rated 5 out of 5 by from Better water quality taste. Aquasana RO filter meets my water quality expectations compared to my old type RO filter sets been used for the last 15 yrs. The water is fresh and delicious. It is easy to install and replace the filters when needed.
Date published: 2018-05-09
Rated 5 out of 5 by from Great Great product, easy to install, certified to remove trace contaminates.
Date published: 2018-05-08
Rated 5 out of 5 by from Great Product with excellent instructions It is rare that I buy a product that needs to be installed or assembled that has instructions as good as what came with the OptimH2O RO. Installation took 2 hours, it took me 40 minutes to get the slotted washer on the faucet assembly, ( tough reach), I kept dropping it. The trick for me was to turn the faucet assembly 90 degrees to allow the washer to slide on more easily. The water is Great!
Date published: 2018-05-01
Rated 5 out of 5 by from Really enjoying it! I just started using my water system, and my water tastes great! Thank you!
Date published: 2018-05-01
Rated 5 out of 5 by from Just as advertised It has been installed for 2 weeks and have had no problems. Was easy to install.
Date published: 2018-04-23
Rated 5 out of 5 by from Exceeded Our Expectations We've had The RO about 3 weeks now and we LOVE IT !! I wish we had ordered one sooner. My husband had no problem installing it, the longest process was drilling a hole in the sink as per our sink wasn't adapted for a water feature. I like the idea of setting up a starship for new filters so I dont have to remember when to order. The Quality of the water is supreme, my whole family has felt various health benefits. From a decrease in inflammation, weigh loss, cleared up acne and taste buds for certain foods are more enlightened. Definitely give the Auqasana a 5 star rating.☆☆☆☆☆
Date published: 2018-04-19
Rated 5 out of 5 by from R O system Installed another a month it was a great value works well fairly easy to install
Date published: 2018-04-16
Rated 5 out of 5 by from great price and high quality purchased filter about 1 month ago, very good customer service, promptly addressed shipping issue I encountered. installation was very straight forward for DIYers. helpful installation video as well. enjoying my water and recommending to family and friends!!
Date published: 2018-04-11
Rated 5 out of 5 by from Greatness Great water. Easy install. Incredible customer service.
Date published: 2018-04-10
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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

We are interested in one of your filtering systems (OptimH20 + claryum) what is the freight cost and how long will it take for delivery? Thanks, Larry Menser - Carmel California

Asked by: Claudy
Hello! Delivery of this item typically takes 3-5 business days. The cost will depend on the delivery speed you select, and your enrollment status in our Water For Life program. Please feel free to contact our team at 866.662.6885 for more information. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-15

What are the dimensions of the unit?

Asked by: Cimoka
They system dimensions are: Manifold: 12" X 4.5" X 12" Tank: 12" diameter, 12.5" Height Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-11

Help with amount of water the storage tank should hold? I currently am only getting 2.2 gallons of storage before the tank is empty? Is this normal for what looks like a 4 gallon storage tank? Mine is a 4 stage R.O with re-mineralizer

Asked by: H20 Drinker
This system has a total gallon capacity of 3.2 gallons. If your tank is not filling up, you may need to check the pressure in the tank. Please contact our customer support team at 866.662.6885 if you would like troubleshooting assistance. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-11

I replaced my red and yellow cartridges with our first 6 month replacement cartridges and now the red canister (outside container) is leaking profusely. The system is currently not operable. How can I fix this?

Asked by: Scotty G
Hi Scotty, Please contact our customer support team at 866.662.6885 so that we can assist in troubleshooting the system. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-11

can this system handle the volume required for a commercial espresso machine and 1.5 gallon coffee maker? Can I return it if I don't need it?

Asked by: k09ne
The system has a daily production capacity of 13.32 gallons. If you use more than 13 gallons of water a day, this system may not meet your needs. We do have commercial water filtration options. If you would like more information on our commercial product, just send an email to aaron.little@aquasana.com Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-10

does this system remove both arsenic 3 & 5

Asked by: DL626
Reverse osmosis (RO) water treatment systems do not remove trivalent arsenic from water very well. RO systems are very effective at removing pentavalent arsenic. A free chlorine residual will rapidly convert trivalent arsenic to pentavalent arsenic. Other water treatment chemicals such as ozone and potassium permanganate will also change trivalent arsenic to pentavalent arsenic. A combined chlorine residual (also called chloramine) may not convert all the trivalent arsenic. If you get your water from a public water utility, contact the utility to find out if free chlorine or combined chlorine is used in the water system. The AQ-RO-3 system is designed to remove pentavalent arsenic. It will not convert trivalent arsenic to pentavalent arsenic. http://cdn.aquasana.com/assets/AQ-RO-3_Performance_Data.pdf Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-09

While I have the faucet turned off, it still sounds like the unit under the sink the still running water. Why is it still making this noise. When I shut off water to the unit via the shut off valve under the sink, it finally stops making the noise.

Asked by: Corey
Hello! The system does produce waste water, so when the tank is re-filling you may hear the sound of water flowing down the drain. You may be able to re-position the drain line so the sound is not so loud. If you are hearing the water drain when the tank is already full, please contact our service team at 866.662.6885 so that we can assist with troubleshooting. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-07

I recently purchased and installed the RO system and it works great except for the gurgling noise that the system makes when it drains water. Is there a way to solve this problem?

Asked by: Vernon
Hello! The system does produce waste water, so when the tank is re-filling you may hear the sound of water flowing down the drain. You may be able to re-position the drain line so the sound is not so loud. If you are hearing the water drain when the tank is already full, please contact our service team at 866.662.6885 so that we can assist with troubleshooting. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-07
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