





💧 Elevate your hydration game with trusted, twist-and-go purity!
The Aquasana AQ-RO3-RO Replacement Under Sink Water Filter is a certified reverse osmosis membrane designed for the OptimH2O system. It delivers 12 months of advanced filtration, reducing 89 contaminants including fluoride, lead, and arsenic. Engineered for easy twist-off replacement without disconnecting hoses, it ensures sustainable, high-quality drinking water straight from your tap.








| Material | membrane |
| Product Dimensions | 3"D x 10.5"W x 3"H |
| External Testing Certification | WQA |
| Product Benefits | Improves water quality by reducing contaminants and features sustainable, eco-friendly design |
| Brand | Aquasana |
| EU Spare Part Availability Duration | 1 Years |
| UPC | 816749011678 |
| Global Trade Identification Number | 00816749011678 |
| Unit Count | 1.0 Count |
| Compatible Water Purifier Models | Aquasana AQ-RO-3 |
| Number of Items | 1 |
| Manufacturer | Aquasana Inc. |
| Part Number | AQ-RO3-RO |
| Item Weight | 1.08 pounds |
| Country of Origin | USA |
| Item model number | AQ-RO3-RO |
| Is Discontinued By Manufacturer | No |
| Size | 1 Count (Pack of 1) |
| Color | White |
| Style | Potable Water Filter |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Included Components | RO membrane |
| Batteries Included? | No |
| Batteries Required? | No |
R**S
If you are looking for a Brita USF-205 filter for the Brita USS-335 system, READ THIS...
I have a Brita USS-335 RO system that uses two carbon filters and one RO filter. The Brita RO filter is a USF-205 and they are pretty much not available anymore. I found that the Aquasana filter AQ-RO3-RO is identical to the Brita USF-205 in every way *except* for one tiny detail. As shown in the photo, the boss next to the two water connections on the filter top is rotated 90 degrees relative to the Brita filter. This boss does not provide a critical function (my guess is that it is used to prevent brand interchangeability). Cut this boss off flush with the filter top, being careful not to nick or cut into the nearby post with the two black o-rings (see photo). This filter comes with the same flow restrictor as the Brita filter did.
C**A
Fits Culligan RO System
Cut off the plastic tab on the top and it fits for Culligan RO system under sink.
T**R
With modification, works on DuPont ro
These seem to be an exact fit except you will notice the turn tab is 90 degrees, but cut it off flat and it works just fine. Nice to have a way to keep them going.
T**I
Replacement for Brita under sink RO
We were unable to get a brand name filter for our reverse osmosis so we ordered this replacement on Amazon. It works great. Thankful for this option.
S**R
Good
Good
S**E
Glad to find this filter
This was the exact filter we needed and easy to put into place. Thank you!
G**
Tasty tasty water
Best tasting water I've had in awhile. My Pro Tip #1. After filtering your water. Allow out to GAS OFF for 48-72 hrs to evaporate any chemicals or chlorines. And vuala! Presto°
P**E
Great tasting water!
Great tasting water! A little tricky to do the refills right but worth the edfort.
Trustpilot
1 day ago
2 weeks ago