In this review, you will learn all about the advantages and drawbacks that come with the Aquasana OptimH2O RO filter system.
The system features a 3-stage filtration process with an additional remineralization stage.
The recommended pressure for operating the Aquasana OptimH2O is between 40 and 100 psi.
Anything lower than that and you will have to use a booster pump or the filtration process will be ineffective.
And lastly, at .5 gpm the system wastes about 4 gallons of water for every gallon filtered which equals a 17.91% efficiency. The flow rate is rather low compared to other RO systems, however, the filtered water to wastewater ratio seems about average.
The full system is tested and certified to NSF standards 42, 53, 58, 401 and also conforms to NSF Protocol P473. We have to admit that we haven’t even heard of NSF Protocol P473 prior to reviewing this filtration system.
Needless to say that, if you are looking for a water filter to finally get rid of a bunch of nasty contaminants lurking in your tap water, this is it!
Just for clarification:
Open the following tab to check out some of the reduction rates that the Aquasana OptimH2O was able to achieve in independent lab tests.
Please note: This is only an excerpt!
NSF Standard 42
NSF Standard 53
NSF Standard 58
Chromium Hexavalent: 97.0%
Radium: 226/228 80.0%
Bisphenol A: 98.9%
NSF Protocol P473
PFOA & PFOS: 96%
All in all, the system is capable of removing up to 99% of 88 different contaminants. And as far as filtration capacity is concerned, the RO membrane can produce up to 35 gallons of water per day – in theory.
Real-life daily system production is 13.32 gallons as per NSF Standard 58 (measured at 50 psi, 77°±2°F, and 717 mg/l TDS). This is not as much as you will get with many other models, but for regular use it’s more than enough.
Last but not least, Aquasana offers a 2-year limited warranty on this product which got you covered in case something goes wrong.
The full package includes the first set of filters, a lead-free faucet available in 3 different finishes (brushed nickel, chrome, oil rubbed bronze) to match your kitchen decor, and all the bits and pieces that are required to set everything up – at least for most customers. More on that below.
Overall, the system is quite easy to install. All you need is some patience and you want to make sure to follow every single step as disclosed in the user manual, especially when it comes to installing the hose. By the way, we really like the manual, because it’s straightforward and makes sense for a change.
And if you are stuck, don’t hesitate to contact Aquasana’s friendly customer service. From our experience, they are more than happy to answer all your questions and help you out as good as they can.
If you’ve never drilled a hole in your life before and you haven’t heard of a tool called wrench, it’s probably a better idea to have a professional do the installation for you.
This video explains the installation in great detail (we know the music is a bit annoying, but we couldn’t find a better one):
This system is definitely low in maintenance. The carbon housings twist off easily, which makes changing the filters a painless process.
Here’s how often you will have to change each component as per manufacturer specifications:
Please remember that these are rough guideline. The exact lifetime of each of the components depends on your water usage and quality. Also keep in mind that timely replacements will protect the RO membrane from high levels of chlorine and/or sediment.
Annual costs? About $180 which is much more than what you pay for maintaining most other RO systems.
The Aquasana OptimH2O manual is available here.
Here is what we don’t like:
On a side note: We saw many users complain about the system producing 3 to 4 gallons of wastewater for every gallon of drinking water. The reason why we don’t consider this a drawback is because it’s simply how the reverse osmosis filtration process works.
If this bothers you, consider buying an additional pump which helps to reduce water wastage by up to 80%. Another trick is to collect the remaining wastewater in a bucket and reuse it, for example to water your garden.
We would recommend the Aquasana OptimH2O under counter RO water filter system to anyone who doesn’t want to make any compromises when it comes to drinking water quality. 5 NSF certifications for a single filtration systems, that’s hard to find.
And let’s not forget that the unit adds bits of healthy minerals to your water for optimum hydration and great taste. The biggest drawback? Exceptionally high maintenance costs for a 3-stage system due to overly expensive replacement parts.
Our verdict: 3.5 out of 5 stars!
Here you can find reviews for all of Aquasana’s water treatment systems.
Not what you are looking for? How about the best reverse osmosis under sink systems?
This completes our Aquasana reverse osmosis review. If you have any questions about the OptimH2O, please don’t hesitate to leave a comment below!