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OptimH2O Reverse Osmosis Stage 2 RO Membrane Replacement

Reverse Osmosis Membrane replacement for the AQ-RO-3 OptimH2O Reverse Osmosis Drinking Water System.

OptimH2O® Reverse Osmosis Stage 2 RO Membrane Replacement is rated 4.4 out of 5 by 34.
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  • MSRP: 59.99

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One Reverse Osmosis Membrane (stage 2) replacement for the AQ-RO-3 OptimH2O Reverse Osmosis Drinking Water System.

RO Membrane should be replaced annually based on water quality and usage for optimal filter effectiveness.

Part number - AQ-RO3-RO

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Read the Reviews

Rated 5 out of 5 by from works well Works as it should. Water tastes great. Price is fair.
Date published: 2018-03-21
Rated 5 out of 5 by from very easy to replace I have used an Aquasana filter in the past to remove chlorine and other impurities but I have become very concerned about the effects of Fluoride on our cognitive abilities. This filter takes 95% of Fluoride out. I'm also adding a 2nd mineralization cartridge
Date published: 2018-02-09
Rated 5 out of 5 by from Wonderful! We've had our unit for two years now and still going strong! We installed it into our 50ft sailboat and no matter where we go we know that we have the best water to drink and cook with!
Date published: 2018-02-07
Rated 5 out of 5 by from Lovin it! We purchased our Aquasana filter system over a year ago and just love it. Got rid of bottled water for good.
Date published: 2017-09-29
Rated 5 out of 5 by from Easy Installation! I replace all of my filters once a year and just a few every six months. Facing the first full replacement, I had my doubts and concerns about the job. It couldn't have been easier unless someone else actually did it for me!
Date published: 2017-09-28
Rated 5 out of 5 by from Excellent product! We have gone through a full year now with complete replacement of all the filters which were very easy to replace - the auto ship made it a very simple project as we had all the filters for replacement. The water quality is excellent and we highly recommend this company and their products!
Date published: 2017-09-21
Rated 5 out of 5 by from Love our reverse osmosis !!! Daily drinking water
Date published: 2017-05-16
Rated 5 out of 5 by from I would by this product again I have had this water filter system for one year now. I love how this water taste. I know I am getting a better quality of water through this system. Before my water system, the water from my tap, or filtered refrigerator water would leave a pink residue build up in my dogs water bowl. Since we installed the water filter system, that has never happened. That right there tells me something about the difference.
Date published: 2017-05-14
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User Q & A

Is this a replacement for the brita USF 205

Asked by: Scratch
Good Morning, Thank you for reaching out to us. No we do not sell brita replacements, 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-5pm CST, and weekends from 9am-5pm CST. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-06-29

How often need replacement stage 2 ro membrane

Asked by: Thang
Good afternoon, Thank you for your question. The RO Membrane needs to be switched out every 12-months. If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-06-17

Help me understand, what is the specific point/value of this filter by itself? What does Membrane Replacement, replace? I'm confused by this filter, and the details above don't elaborate/explain.

Asked by: Dagny
The RO membrane is located in stage 2. This membrane reduces the dissolved solids and organic matter. I have linked down below a link to the system to better understand the system. https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum If you have further questions please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-01-28

What type of plastic is the tubing made from? 

Asked by: Andalee
Hello Andalee, Thank you for your question. The RO membrane is made out of a thin polyamide layer (<200 nm) deposited on top of a polyethersulfone or polysulfone porous layer (about 50 microns) on top of a non-woven fabric support sheet. if you need further assistance please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-12-05

My replacement filter is missing drain port elbow. Any helpful suggestions? 

Asked by: Jimmyy
Aquasana doesn't ship a replacement elbow along with the new RO filter, so you have to remove and re-use the old elbow. Push the red ring around the elbow towards the filter, while pulling gently on the elbow. It should come loose pretty easily. Unfortunately the instructions don't mention this AND they tell you to just throw away the old filter, which includes the elbow. I've had my system for two years (and really like it) but last year when I replaced the filter it was the same story. I would have thought they'd fix the instructions by now. Called customer service to let them know about the issue and got a very unhelpful response, so I expect this will continue to frustrate their customers for the foreseeable future.
Answered by: filterFan
Date published: 2019-05-29

Does Ro filter have CTA or TCF membrane?

Asked by: Obixir
Hello, Thank you for your question. The RO filter uses the TCF membrane. If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-02-27

RO Membrane shelf life??

Asked by: Membrane ShelfLife
As long as the filter stays in its original packaging and remains dry, the filter cartridges do not expire. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2019-10-09

How long is this Membrane filter lift time? My previous Aquasana Reverse Osmosis system has Membrane filter life of 2 years. This seems only one year. Why?

Asked by: Tom T
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