The 10 Best Reverse Osmosis Systems in 2024 (Including Countertop and Customizable Options)

Welcome to the Thomas guide to the best reverse osmosis system 2024. Thomas has been connecting North American industrial buyers and suppliers for more than 120 years. When you purchase products through our independent recommendations, we may earn an affiliate commission.

Reverse osmosis is a modern technique for purifying water. The secret lies in the specialized membrane that filters out impurities, enhancing the flavor and aroma of the water while removing contaminants such as chlorine, lead, arsenic, and others. This scientific breakthrough is aimed at a better future, free of water-borne diseases and industrial pollution that endangers our water resources. This technology, which ranges from individual water purifying systems to industrial desalination facilities, has the potential to usher in a new era of sustainability by making clean water available to all.

By removing harmful substances, reverse osmosis systems not only improve the taste and odor of water but also protects health, giving peace of mind to individuals and families. In addition to its health benefits, water purification has environmental advantages. Instead of using single-use plastic bottles or unsustainable water sources, having a home purification system allows for the use of tap water. This reduces plastic waste and the carbon footprint associated with bottled water production and transportation.

Here is a list of the top reverse osmosis systems, followed by a buying guide to help you select the best reverse osmosis system for your needs.

From countertop to under-sink options, we've found a reverse osmosis system for every need.

Best Reverse Osmosis System Overall: Waterdrop WD-A1 | Buy Now

Best Reverse Osmosis Water Filtration for the Whole House: Aquasure AS-WHF64D | Buy Now

Best Countertop Reverse Osmosis System: Bluevua RO100ROPOT | Buy Now

Best Under Sink Reverse Osmosis System: iSpring RCC7AK | Buy Now

Best Tankless Reverse Osmosis System: Waterdrop G2 Reverse Osmosis System | Buy Now

Best Reverse Osmosis System for your Water Storage Tank: FS TFC FS-RO-100G-A | Buy Now

Best Customizable Reverse Osmosis System: EXPRESS WATER UV Reverse Osmosis | Buy Now

Best Ice-Making Reverse Osmosis System: ICEMAKER-KIT-RO-1-4 | Buy Now

Best Instant Hot Water Reverse Osmosis System: MELISSANI M1 | Buy Now

Best Budget Reverse Osmosis System: Whirlpool WHAROS5 | Buy Now

Scroll down to read more about these top picks for the best reverse osmosis water filtration according to many happy buyers.

*Prices listed in this article were as shown in US$ on amazon.com (USA) as of September 2023

1. Best Reverse Osmosis System Overall—Waterdrop WD-A1

With so many different products on the market, finding pure, clean water might feel like a monumental undertaking. The Waterdrop WD-A1 Countertop Reverse Osmosis System achieves a happy medium between portability and high-tech filtration mechanisms. The system can also provide water at a variety of temperatures for drinking, such as room temperature, chilled, or hot enough for a cup of tea.

The ratio of clean water to waste water in conventional RO systems is normally 1:3, but this product offers the added improvement of having an eco-friendly construction resulting in cost and resource savings. Being bottle-free by design, it reduces wasteful consumption and helps preserve the planet's natural resources. 

Easy setup means that even users with no technical knowledge can get it up and running without calling in the pros. One satisfied customer wrote, "Took 10 seconds to unwrap, replace and reset. Easy to install and only took five minutes to prime the system." The initial investment may seem high, but the product's long-term usefulness and its stellar warranty make it a worthy option.

Specifications

Water Filtration System: Countertop reverse osmosis system

Stages of Filtration: 6-stage reverse osmosis system 

Production Rate: 100 gallons

Water Supply or Storage: Storage tank

Certification: NSF/ANSI 53, 58, 42, and 401 standard

BUY NOW: US$699, Amazon

Also Available at: Waterdrop

2. Best Reverse Osmosis Water Filtration for the Whole House— Aquasure AS-WHF64D

A reliable whole-house water filtration system is important, especially for families with kids or people with sensitive skin. The Aquasure AS-WHF64D water filtration bundle offers a system with 75 GPD production that is more than enough for larger families. The system is especially scalable, so whether you need one bathroom or six, your initial investment will cover it all. The addition of pre-filters is a noteworthy addition to this system. 

Removing bigger impurities before they damage the delicate reverse osmosis membrane helps primary filtering systems last longer. It's built to waste as little water as possible, too, which helps the planet and the bottom line. The pairing of the reverse osmosis filters with the digital metered control softener guarantees the best possible water filtration standards while also providing optimal water softening. 

Up to 99% of silt, chlorine, and dangerous microbes are eliminated. After having the system for a year, one customer explained, "I am SO THRILLED with both the water softener and RO filter. They have been holding up great. No problems whatsoever. All I have to do is add salt to the softener."

Specifications

Water Filtration System: Whole house osmosis water filtration system

Stages of Filtration: 4-stage reverse osmosis system 

Production Rate: 75 gallon

Water Supply or Storage: Cold water line

Certification: Not available

BUY NOW: US$929.99, Amazon

Also Available at: Aquasure, and The Home Depot

3. Best Countertop Reverse Osmosis System—Bluevua RO100ROPOT

Those looking for a countertop reverse osmosis system typically prioritize portability in addition to efficiency, and filtration capacity. The Bluevua RO100ROPOT reverse osmosis water system is an excellent option for people after a high-quality countertop water filter as it performs admirably in every category. This reverse osmosis filtration system is a beautifully crafted, portable option that doesn't require a sizable space commitment on a countertop. 

One customer explained, "The unit takes up little space (about the equivalent of a stand mixer), which makes it easy to fit onto a kitchen countertop with plenty of clearance under the cabinets." Its design allows it to be used in spaces where a permanent installation would be impractical, such as smaller kitchens or rentals. A rigorous four-stage filtration process assures that the water is fit for human consumption and other uses. The Bluevua system was created to be simple to use and maintain. 

Countertop systems are notorious for requiring more regular filter replacements than other types of systems due to their compact design; nonetheless, this product requires your attention once every 12–24 months. "We have owned several brands that required maintenance on a regular basis and never lasted more than 2–3 years," wrote a customer. "[In this case] the maintenance was easy, just replace a seal."

Specifications

Water Filtration System: Countertop reverse osmosis filters

Stages of Filtration: 4-stage reverse osmosis system 

Production Rate: N/A

Water Supply or Storage: Storage tank

Certification: SGS

BUY NOW: US$389 (Was $434), Amazon

Also Available at: Sears

4. Best Under Sink Reverse Osmosis System—iSpring RCC7AK

The iSpring RCC7AK strikes a fine balance between high-tech filtration, intuitive operation, and elegant construction. This device, designed to fit neatly under your sink, filters water six times before it reaches your faucet, giving you pure drinking water. The RO filtration system stands out from the crowd thanks to its six-step filtration process, one of which is a pH+ Remineralization stage. Although reverse osmosis does a great job of cleaning water, it typically also removes healthy minerals in the process, leaving the water slightly acidic and lacking in flavor. 

This system's alkaline remineralization filter corrects this by reinstating calcium and magnesium, which in turn normalizes the water's pH and enhances its flavor. With a GPD capacity of 75, this system is a good option for homes with varied water demands, such as medium to large families, as it guarantees a steady supply of clean water without the need to replace the filter frequently. 

A customer who was specifically looking for a good drinking water solution remarked, "We did some cost analysis and figured we were spending about $500 per year on bottled water, and saw that the filter system was about half that price, and about a quarter the price each year after for replacement filters."

Specifications

Water Filtration System: Under sink reverse osmosis water filters

Stages of Filtration: 6-stage reverse osmosis system 

Production Rate: 75 gallons

Water Supply or Storage: Cold water line

Certification: NSF/ANSI 58

BUY NOW: US$196.64 (Was 218.49), Amazon

Also Available at: Walmart, Lowe's, and The Home Depot

5. Best Tankless Reverse Osmosis System—Waterdrop G2 Reverse Osmosis System

The Waterdrop G2 reverse osmosis filter system is ideal for those who want space efficiency and a streamlined design without having to sacrifice the purity of their water. It has a seven-stage filtering process, high throughput, and an environmentally-friendly construction. After using a test kit, one customer confirmed, "The system claims to reduce TDS by about 90% or more, and that's right where I am at."

This all-encompassing method of filtration guarantees that the water consumers receive is not only clean but also of consistent quality. The system's trustworthiness is confirmed by its inclusion on the FCC's approved list. Its high water output makes it perfect for houses with large families who use a lot of water, and it's even suitable for small commercial establishments. Its environmental credentials are bolstered by the 1:1 pure-to-drain ratio, which indicates no water is wasted during the purification process.

This reverse osmosis water filter also has the added benefit of being tankless, which is a major plus. Space limitations and bacterial growth are common problems for conventional RO systems that use tanks. A long-term user enthusiastically shared, "My in-laws have a traditional R/O system that takes up the entire cupboard under their sink. Doing some research, these can have issues with mold growth if left unused for any sort of prolonged period. I feel much better with this system, and it fits in nicely aside my waste disposal unit."

Specifications

Water Filtration System: Tankless reverse osmosis systems

Stages of Filtration: 7-stage reverse osmosis system 

Production Rate: 400 gallons

Water Supply or Storage: Water supply

Certification: FCC

BUY NOW: US$299.99 (Was $333), Amazon

Also Available at: Walmart, and Waterdrop

6. Best Reverse Osmosis System for your Water Storage Tank— FS TFC FS-RO-100G-A

For places that keep their water in tanks, the FS TFC FS-RO-100G-A reverse osmosis water filtration system is an attractive option. The five-stage filtering process plays a crucial role in achieving water purity. It is built to efficiently filter out sediments, chlorine, and heavy metals, leaving clean water fit for consumption. The total water quality is improved by the multi-stage process's attention to each individual type of contamination.

There are four extra filters included that not only reduce the frequency of required maintenance but also help save money on filter replacements. Another major factor in the success of a water filtration system is how easily it is installed and maintained. This RO filter system is intended for do-it-yourself installation, as attested to by both official company documentation and user feedback. 

"The package was well packed and all components were present," reads one customer review. "Included was a small but complete installation manual. It was installed easily and quickly." Considering the importance of a proper installation and the technical nature of this reverse osmosis system, work by a professional might be preferable.

Specifications

Water Filtration System: Whole house reverse osmosis filter systems

Stages of Filtration: 5-stage reverse osmosis system 

Production Rate: 100 gallons

Water Supply or Storage: Water storage

Certification: Not available

BUY NOW: US$118.99 (Was $139.99), Amazon

7. Best Customizable Reverse Osmosis System—EXPRESS WATER UV Reverse Osmosis

The EXPRESS WATER UV Reverse Osmosis Water Filtration System stands out as a great option for people looking for a fully customized and all-encompassing water purification system. This system not only removes harmful contaminants but also adds beneficial minerals to the water through an 11-stage filtering process that includes a UV light filter and an alkaline filter. It's a strong option for homes of varying sizes because of its 100 GPD capacity.

The system's 100 GPD capacity means it can handle the demands of both large and small households with ease. This high rate of flow guarantees that clean water for drinking, cooking, and washing is always within reach. In addition, the system's under-sink placement, built-in faucet, and tank significantly simplify its operation. It makes water filtration more accessible by placing it in a single location in the home.

The introduction of a UV light filter is advantageous because it can destroy microbiological pollutants that may have passed through earlier filtration processes. Users who care about water safety, particularly in places with documented water quality issues, will find this system indispensable. A happy customer noted, "The taste is great, but what makes this stand apart from the competition is the support and ease of installation. With color-coded jacks and hoses, with much of the system preassembled, the installation can be done by anyone."

Specifications

Water Filtration System: Under sink water filter

Stages of Filtration: 11-stage reverse osmosis system 

Production Rate: 100 gallons

Water Supply or Storage: Water storage

Certification: NSF 58

BUY NOW: US$220.15 (Was $259.99), Amazon

Also Available at: Walmart, The Home Depot, and Express Water

8. Best Ice-Making Reverse Osmosis System— ICEMAKER KIT RO-1-4 

While the ICEMAKER-KIT-RO-1-4 is not a reverse osmosis system in and of itself, it is a helpful addition to current RO systems, as it bridges the gap between pure water and seamless, everyday use. This kit is designed to link reverse osmosis systems to refrigerators and ice machines. Its main benefit is that it allows consumers to easily get cold, purified water and ice cubes directly from their refrigerator. 

RO systems typically distribute purified water through a specialized faucet, which is commonly positioned under the sink. While this satisfies fundamental necessities, having cold, pure water and ice at the touch of a button is a luxury that many will appreciate. The kit includes all necessary components as well as detailed instructions for a simple DIY installation. 

A satisfied user explained that it was "easy to install" and came "with good instructions." They added, "[It] makes ice taste so much better with my RO system. Worth buying the kit versus trying to source all the parts on your own." Additionally, this product is intended to work with a variety of RO systems as well as different refrigerator models. Due to its broad compatibility, it is a versatile option that can be used with practically any existing system.

Specifications

Water Filtration System: N/A

Stages of Filtration: N/A

Production Rate: N/A

Water Supply or Storage: Water Supply

Certification: N/A

BUY NOW: US$15.99 (Was $18.99), Amazon

Also Available at: The Home Depot, and Lowe's

9. Best Instant Hot Water Reverse Osmosis System—MELISSANI M1

With its five-stage reverse osmosis filtration process and its capacity to dispense hot water in just three seconds, the MELISSANI M1 countertop water purifier is a versatile product. Output water is guaranteed to be pure and safe as the five-stage filtration process, along with the LED-UVC sterilization, gets rid of all kinds of harmful substances, such as sediments, chlorine, and heavy metals.

This system is unique in that it can provide hot water in as little as three seconds. Those who enjoy sipping hot beverages on a daily basis or who have an instant need for hot water for cooking will find this option especially useful. It streamlines the cooking process by doing away with the need for a separate kettle or heating water on the stove. One satisfied customer exclaimed, "The literal instant hot water is what surprised me the most."

In relation to the overall quality of water you can get from this osmosis water filtration system, another verified buyer wrote, "The real magic, however, lies in the quality of the water it produces. The Melissani M1 utilizes advanced hydrogenation technology to infuse the water with molecular hydrogen. The result? A crisp, clean taste that's noticeably smoother than regular water."

Specifications

Water Filtration System: Countertop osmosis systems

Stages of Filtration: 5-stage reverse osmosis system and LED-UVC sterilization

Production Rate: N/A

Water Supply or Storage: Water storage

Certification: Not available

BUY NOW: US$499.99 (Was $599.99), Amazon

10. Best Budget Reverse Osmosis System—Whirlpool WHAROS5

The Whirlpool WHAROS5 reverse osmosis water filtration system is an impressive blend of quality and price if you're looking for an affordable alternative for water filtration. This system comes with a sleek chrome faucet and is small enough to fit neatly under most sinks, making it a practical and affordable way to get pure water.

The performance-to-cost ratio of this system is impressive, especially when you consider its reasonable price point. The system's multi-stage filtration process effectively removes sediments, chlorine, and hazardous bacteria from the water, guaranteeing that it meets the highest quality standards.

Its straightforward construction makes it a good option for people who aren't particularly DIY savvy or who are otherwise unfamiliar with water-filtering devices. One happy homeowner wrote, "I am soooo pleased with this purchase, I can't stop telling people to get this one. It was fairly easy to install, I read the manual and installation steps carefully. Planned the installation and did it myself in about an hour and a half."

Specifications

Water Filtration System: Under sink water filter system

Stages of Filtration: 3-stage reverse osmosis system 

Production Rate: 1 gallon per minute

Water Supply or Storage: Water supply line

Certification: NSF

BUY NOW: US$133.53, Amazon

Also Available at: Walmart, The Home Depot, and Lowe's

Whether you are particularly health-conscious, fussy when it comes to the taste of your water or a staunch advocate for the environment, the best reverse osmosis system might just be the solution you've been searching for. 

Overall, the Waterdrop WD-A1 Countertop Reverse Osmosis System (US$699, Amazon) is a great option for anyone looking for a high-quality, easy-to-use water filtering system. It is a top-tier product for filtered water, has NSF/ANSI 58 certification, and offers low water consumption, and adjustable temperature settings.

On the other hand, the MELISSANI M1 (US$499.99, Amazon) reverse osmosis countertop water purifier is an excellent pick for anyone in need of premium water purification and instantaneous hot water access. Its five-stage filtering process is used by professionals and guarantees high-quality water, while the hot water feature adds a level of convenience not seen in most RO systems. This method is worth considering if you care about the quality of the water you drink as well as your ability to access it quickly and easily.

Choosing the Best Reverse Osmosis Water Filter—Buying Guide

Reverse osmosis systems offer game-changing technology that promises to turn tap water into pure liquid to quench your thirst. But it can be difficult to choose the best water filtration system for you with so many options available. So what should you look for when shopping for these systems?

Reverse Osmosis Systems

When deciding on a residential or commercial reverse osmosis system, it's important to first determine the system's intended purpose to ensure that the system will meet your specific needs. Here are a few things to keep in mind. 

Type of Filtration System

The first thing to consider when selecting a reverse osmosis system for your house is the sort of system that best meets your needs. There are three main types available:

Under-sink systems are hidden under your kitchen sink and provide purified water through a separate tap; 

Countertop systems are portable units that attach to an existing faucet; and

Whole-house systems provide purified water throughout your home. 

Each type has advantages and disadvantages, so before making a decision, consider your household's individual water use patterns and installation process constraints.

Filtration Stages and Customization

Another critical factor to consider is the amount of filtration stages each unit offers. In this regard, an RO filter system can range from a three-stage to an 11-stage filtration procedure. Each stage is intended to eliminate a different sort of pollutant, based on your needs. In general, a higher number of stages results in purer water, but this will typically have a higher starting cost.

It is best to look for a reverse osmosis water filter that you can customize based on the harmful contaminants in your area. If you aren't sure what you need, you can always use the Original Watersafe Water Testing Kit (US29.99, Amazon) and customize your reverse osmosis water filtration accordingly.

Water Pressure

Another critical aspect is water pressure. RO systems require a certain degree of water pressure to perform properly, often between 40 and 60 psi. If your area has poor water pressure, check for systems that include built-in booster pumps. These pumps can increase water pressure, resulting in more efficient operation.

Storage Capacity

The tank volume of the RO system is also crucial. Select a tank size based on your household's daily water requirements. Under-sink tanks typically have capacities ranging from 2–4 gallons. 

Keep an eye on filter life and simplicity of replacement as well. Some systems include alarm devices that warn you when it's time to change the filters, making maintenance easier.

Certification

Another important requirement is certification. Always use systems that have been certified by recognized organizations such as NSF International or the Water Quality Association (WQA). These certifications guarantee that the system is effective in removing impurities and meeting safety criteria.

Finally, think about any extra features that might be of interest. These can include remineralization stages that replenish important minerals lost during the RO process, UV treatment for increased microbiological safety, or smart indicators like Total Dissolved Solids (TDS) meters. 

By carefully analyzing all of these aspects, you can make an informed selection that assures you select a RO system that fits both the qualitative and economic needs of your household's water purification.

We hope our review of the best reverse osmosis system has been helpful. For more suppliers of related products, including water treatment equipment, water filtration & purification systems, water distilling equipment, water-saving devices, and water treatment chemicals consult our additional guides, or visit the Thomas Supplier Discovery Platform.