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Your search for the best water filtration systems for your household brought you here. Want to ensure you and your family enjoy unrestricted access to safe and healthy drinking water? You may have considered water filter pitchers and refrigerators, but they can only do much to reduce contaminants and improve odor and smell. To get the best water purification experience, you need a reverse osmosis water filtration system.
There are tons of RO systems out there. You can spend all day looking for the best. But we have made it all easy for you – just read through our Reverse Osmosis Water Filter Buying Guide. We have wp-org-recommended the 5 best reverse osmosis water treatment systems from the best manufacturers in the industry, each with impressive features.

Top-5 Expert Recommendations

1. Waterdrop G3 RO Reverse Osmosis Water Filtration System
Asides from the powerful filtration process this system delivers, you also get a host of great features and a sleek, compact design. It relies on a seven-stage filtration to provide constant clean and great-tasting reverse osmosis water for your household.
Here are the three biggest features that made us recommend the Waterdrop G3 RO System;
NSF Certified Performance
The system has an NSF 58 certification for TDS reduction. The filtration accuracy of the reverse osmosis filtration technology in this system is 0.0001 microns, making it highly effective against most contaminants. This system reduces heavy metals, limescale, fluoride, and even TDS in your tap water. There is also an NSF 372 certification for lead-free materials.
Unlike other under sink reverse osmosis water filter systems with a pressurized storage tank for keeping filtered water, this Waterdrop RO system provides filtered water on demand. It continues producing rather than slowing down to refill the tank. The absence of a tank also makes installation easier.
5x Normal Daily Output
The system is fitted with an internal pump, with a capacity to produce about 400 gallons per day – that’s a major upgrade to the 75 gallons per day most traditional RO systems with a tank of offers. The filtered water to wastewater ratio is 1:1.
2. APEC Water Systems Essence Series Water Filter System
This RO system is known for its seamless installation and high-capacity filters. You get a longer service life from the filters compared to other water filter systems. This RO system from APEC adopts a six-stage filtration system, which allows the filter to last for a full year before they are due for replacement.
This system gets rid of 99% bacteria while restoring the important healthy minerals and calcium into the filtered water. You can get up to 75 gallons of filtered water daily. The wastewater to filtered water ratio is 3:1, i.e., 3 gallons of wastewater for every 1 gallon of filtered water.
You will need sufficient under sink space for this water filter system, thanks to its 11-inch by 15-inch, 4-gallon tank.
3. Waterdrop G2 P600 Reverse Osmosis System
When you opt for this system, you get a 600 GPD output and a highly efficient filtered water to wastewater ratio of 2:1. This is easily the most efficient and fastest RO system on our list. The tankless design makes the system easy to install and maintain. You also need a little space under your sink to accommodate this powerhouse.
TheWaterdrop G2 P600 is a reliable water filter. It is ideal for homeowners who want a system that gets the job done with little or no noise.
with little or no noise
4. iSpring RCC7AK-UV Reverse Osmosis System
If your source water is coming from the well, the iSpring RCC7AK-UV is your go-to RO water filter system. Unlike the municipal tap water that has been treated to remove/reduce microorganisms, well water still contains higher levels of microorganisms.
It comes with an integrated Ultraviolet (UV) light filter that sterilizes the water, killing every virus, bacteria, and other microorganisms that may be present after reverse osmosis filtration. Aside from this RO system’s higher capacity, it relies on a 7-stage filtration to provide pure and great-tasting drinking water. The UV filter included requires a 110V power outlet to work and deliver 75 gallons of purified RO water daily.
The iSpring RCC7AK-UV Reverse Osmosis System only expends 3 gallons of wastewater for every gallon of purified water produced. This may be lower or higher, based on the pressure of your feed water. The user-friendly design of this system means you can easily install it using the components included in the box. You can install every component, including the pressurized storage tank and the faucet, in about an hour.
5. NU Aqua 7-stage Reverse Osmosis System
The NU Aqua 7-stage Reverse Osmosis System has the five basic filtration stages and two advanced stages – the UV (ultraviolet) light filter that eliminates bacteria and microorganisms and the alkaline filter that restores beneficial materials to the filtered water.
There is also a booster pump that minimizes the amount of wastewater while improving efficiency. The 100 gallons per day output capacity is one of the best around. Chances are you will not need this amount of filtered water every day, but the higher capacity guarantees a higher flow rate.
Another feature worthy of mention is the 5-year manufacturer warranty and lifetime support that comes with this system. Having a 5-year warranty on RO systems is not common, but the NU Aqua offers that.
Lastly, you get a free digital PPM meter water tester that helps you easily measure the RO water’s overall quality. This comes as a bonus to the overall package.

Conclusion

Each RO system on this list offers a host of different features. All you have to do is compare the features to your household filtered water needs and see which works best for you. Whichever you end up with, rest assured of a lasting and constant supply of safe, pure, and healthy filtered water for you and your household.

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