Remineralization process promotes optimal water quality. Detailed instructions for easy installation, and water pressure remains unaffected. Great customer service.
Multiple components look daunting to install. Pricey.
Tankless design saves impressive amount of space compared to other systems. Innovative filter design installs and replaces in seconds. Low drain rate and high flow rate uses water efficiently.
Some note difficulty fitting to home pipes.
Impressive faucet quality for the price. Very easy to install with no pipe threading required. Features attractive European-style kitchen faucet. Users frequently highlight quality taste.
Water flows slowly. Requires a fair amount of water. Included O-rings are flimsy.
Easy to install. Its 5-stage filtering system significantly improves water taste and removes odors. Faucet has a sleek chrome design. Mid-range price.
Filters may not last as long as desired. May leak and/or reduce water pressure.
Fits 600GPD Reverse Osmosis System unit. Installs and replaces in seconds with simple twist. Includes water softener, chemical filter, particle filter, and membrane filter for excellent water quality. Lasts two years.
Fits only Oasis Osmosis Home tankless unit.
We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.
Water is a big part of our lives, especially since it makes up 50% to 60% of the adult human body. When you feel dehydrated, reaching for a glass of water is a quick solution to quench thirst. However, to some, tap water isn’t the most appealing solution, so they reach for bottled water, filtered water, and other alternatives. Thanks to the rising popularity of reverse osmosis systems, fewer people find themselves second-guessing the quality of that glass of tap water.
Reverse osmosis systems filter impurities and contaminants from tap water. They’re installed beneath your kitchen sink and connect to a separate dedicated faucet. Not only can they catch contaminants missed by municipal water filtration, they can also reduce the residue pulled from household pipes on the way to the faucet. This easy solution also cuts down on bottled water use, as well as the wait time for water to go through filtration pitchers.
If you’re looking for a cost-effective, healthy, and green solution for drinking water, a reverse osmosis system is a worthwhile investment.
A reverse osmosis system is comprised of a tank, filters, and tubing. It takes up considerable room in an already limited space under the sink. Some compact models can be neatly edged against a side wall; others have a lot of girth and monopolize the area. On average, reverse osmosis systems take up a bit more space than a gallon jug of milk.
It’s a long-term investment to purchase a reverse osmosis system, so it’s expected that maintenance, like changing filters, will be an ongoing expenditure. Because models vary in their number of stages and filtration methods, some require more filters than others. They also vary in their frequency of change, as some last longer than others.
Reverse osmosis systems are low-maintenance items, but they do occasionally need parts replaced. Washer tubes are the most common pieces to be changed out at some point. Some systems have plastic pieces, like washers and fasteners, that are recommended to be replaced with metal versions.
Reverse osmosis systems are efficient in homes with septic water, though they’re not always recommended if you have well water. Some manufacturers are frank and either state the system is not designed for well water use or offer system modifications to accommodate it. Other manufacturers advertise their product’s ability to accommodate both types of water as a perk.
The amount of water a reverse osmosis system puts out per day is measured in gallons per day, or GPD. The typical system puts out 50 GPD, though some can reach 100 GPD. Bear in mind that a product’s GPD is an average or approximation.
Number of stages: Reverse osmosis systems remove pollutants through different stages for a rigorous cleaning and purification process. The number of stages range from three to 10, with five stages being the most popular amount. The price of the model doesn’t really affect the number of stages, so there are quite a few expensive systems that have five stages. In fact, some models indicate they have five consolidated, efficient stages instead of drawing out the process with more.
Reverse osmosis systems are designed to filter as many contaminants as possible — and there are thousands out there. The standard filtration across the board targets larger particles (think visible ones) like dirt, sand, and sediment. As for the other types of dedicated filters, there are a variety of combinations. Some systems even include more than one of the same filter type. This either creates redundancy for overall cleaner water, or it targets different particles between the stages.
Sediment filters: Dirt, sand, and sediment are among the larger particles in water. In addition to being pollutants themselves, they attract other harmful particles. As a result, they’re usually targeted in the first stage of reverse osmosis systems.
Carbon filters: These filters target organic pollutants as well as rust, pesticide, sludge, and other residue. They also reduce chemical levels, including chlorine and fluoride. Some chemicals can cause an odor or metallic taste in water, so these filters are instrumental to the reverse osmosis process.
UV filters: Ultraviolet light (UV) functions as a disinfectant and sterilizer at the microbial level. It’s the main filter that targets bacteria and viruses that fester in water, as they’re resistant and unresponsive to the other filters.
A dedicated faucet is a basic inclusion in reverse osmosis systems. They’re usually thinner and smaller than a main faucet, as smaller amounts of water are dispensed at a time. These faucets sit pretty tall with curved necks to be out of the way of other kitchen sink traffic. In some models, the base rotates, but others can be stationary. In more expensive, package-priced systems, the faucets tend to be more aesthetically appealing with some color or finish options.
Reverse osmosis systems cost between $150 and $600, with the most popular price point between $200 and $400. These mid-range systems offer between five and 10 stages of purification and filtration. Some come with fancier faucets, spare filters, or maintenance kits, which add to the the price.
For systems on the opposite ends of the spectrum, price revolves around stage sophistication and component grade. The least-expensive ones around $150 stick to five stages with very modest faucets, some of which are flimsy. They also have more rudimentary designs and are less compact than others. At the high end, pushing closer to the $600 mark and up, components are made of noticeably better quality. Not all have 10-stage systems, though they’re more efficient and can filter in consolidated stages as opposed to the isolated ones seen in mid-range models.
Establish a maintenance schedule. Reverse osmosis systems require cleaning and maintenance, as explained in their user guides. Set a schedule on your phone or calendar to keep up on it so your system remains in good working condition.
Test the pH of your water. Compare the pH of water between your reverse osmosis system and regular tap with pH testing. Obtain an accurate reading, and check levels on a regular basis to monitor the effectiveness of your system.
Prepare necessary tools prior to installation. Because some reverse osmosis systems are do-it-yourself, check the installation guide to see which tools you need. Power drills and wrenches are some commonly required tools. Plumbing tape and spare washers may also be helpful to have on hand.
Enlist someone’s help. Even though reverse osmosis systems feature easy do-it-yourself installation, certain steps could be completed more efficiently with another pair of hands.
Clear out the space beneath your sink. Reverse osmosis systems take up a reasonable amount of space, so clear out unnecessary items. It’s also a great opportunity to give the space a deep cleaning or a fresh application of cupboard lining.
If tinkering with your sink and plumbing is out of the question, the Aquatru Countertop Water Filter Purification System with Exclusive 4-Stage Ultra Reverse Osmosis Technology is a fair option. There’s no hassle with installation, and you can transport it easily to other rooms. It only purifies one gallon at a time, though, so it might be best for small households or an office cubicle.
The Aquasure Premier Advanced 75GPD Reverse Osmosis Water Filtration System with Quick Change Water Filter has a unique combination of features. It has exclusive leak detector technology as well as a safeguard to prevent against sudden water pressure changes. This model denotes the ease with which homeowners can change filters in addition to a long lifespan. It’s one of the fewer models with the option to choose faucet finishes.
Q. Am I limited to using the faucet that comes with my reverse osmosis system?
A. You may use a compatible faucet as an alternative. Feel free to get one that matches the rest of the hardware and décor of your kitchen, so long as it fits with the rest of the sink’s plumbing components.
Q. I’m moving, so can I take my reverse osmosis system to our new home?
A. Yes. Simply disconnect the system and reconnect the original sink setup. Some manufacturers even have uninstallation tutorials available, or their customer service can guide you during a call. If you’re concerned about the extra hole from the system’s faucet, purchase an inexpensive sink hole cover to plug it.
Q. Can I adjust the temperature of the water coming out of the system faucet?
A. No. It will only stream cold or cool water, as it’s not connected to hot water. These systems and components were designed for cold water, and some manufacturers say hot water could cause permanent damage.