7 Best Reverse Osmosis Systems in 2021- Reviews and Buyer’s Guide

APEC 6-Stage Reverse Osmosis Water Filter System is designed to improve the water quality for drinking and cooking. The unique filtration system eliminates up to 99 percent of hazardous toxins, sediments, and impurities. These premium filters are rigorously tested to ensure the highest contaminant removal rate.

Capacity

Unlike most models in the market, APEC 6-Stage Reverse Osmosis System features extra-capacity cartridges and long-lasting RO membranes. This product can purify up to 90 gallons of water per day, which is more than enough even for a large family. Additionally, the RO membrane of this filter is extremely durable, which only requires annual maintenance for optimum performance.

Micron Rating

The pre-filtration technology of the APEC RO system removes water contaminants down to 5 microns. This feature is significant for the durability of the RO membrane. Once the water passes through the prefilter, the membrane does the rest. The RO membrane removes the remaining particles up to 0.001 microns and produces pure water.

Flow Rate

The flow rate of APEC 6-Stage Reverse Osmosis System is exceptionally high. With 0.5 gallons per minute, this model outperforms most of the systems of its kind in this category.

Design 

The premium APEC system has a flexible design that virtually fits anywhere you want. The sturdy metal frame can also be mounted on the wall. The comprehensive kit of APEC includes cartridge set and holding tank. All the plastic components in the system arebuilt with food-grade materials. Additionally, this system is easy to install and requires no electricians and plumbers.

This top-rated RO system by Express Water is equipped with ten-stage filtration technology. As each filtration stage serves its individual purpose, it is highly effective in eliminating dirt, sediment, debris, and other contaminants to produce pure and clean water. This model is loaded with some great features and wastes relatively less water compared to other systems.

Filters

As this RO system is powered with a 10-stage filtration technology, it is highly effective in removing waterborne contaminants. The first five stages of the filtration process are somewhat similar to other RO systems. However, the filtration process gets even more advanced once the water passes to the sixth stage. While most manufacturers have considered remineralization as a one-step process during filtration, Express Water RO system counts each step in remineralization as a significant stage.

Easy Installation

When it comes to the installation process, the Express Water RO system is a cinch. The model comes with detailed instructions that are easy to follow. However, it may take a couple of hours to set up the entire system. The additional pressure gauge will make it convenient for you to monitor the operating pressure of the system.

Design

This system comes with a unique, flawless, and easy-to-use design. The system includes a membrane, a polishing filter, and three carbon filters. Designed for a high flow rate, the filtered water passes through the remineralization stage to produce crystal clear water.

Home Master Artesian Full Contact RO System delivers pure Alkaline Mineral Water. This system produces clean and safe water by removing 98% of contaminants using the RO process and then remineralizes it using patented Full Contact Technology. It comes with a Fast Flow RO Kit, which delivers double the flow rate than the typical faucet.

Water Efficiency

Home Master Artesian Full Contact RO System comes with a Fast Flow kit that produces 50 gallons of pure water every day. However, it is one of the least efficient systems on the list. With every gallon of pure water, this system creates about four gallons of water waste. This is an excessive amount of wastage. 

Filtration Design

This system features a modular filter design which makes replacing the filter elements extremely easy. You do not need any tools for filter replacement — simply pull the old filter from the housing and push the new one for replacement. The filter replacement should be carried out at least once every year.

Easy Installation

This appliance is extremely easy to install and requires no professional plumber for the installation. The only complication that comes during the installation is drilling a hole in the sink top. For your convenience, it also comes with a user’s manual that provides detailed instructions for installation.

Waterdrop RO System is powered by a triple-stage filtration technology with supreme performance. With filtration accuracy of 0.0001 micrometers, this system effectively removes water contaminants from the tap water to produce highly pure water. The revolutionary design of this RO system features no storage tank. Therefore, this compact system can fit virtually anywhere and occupies less space, unlike traditional appliances.

Triple-Stage Filtration System

Waterdrop RO System has three-stage filtration technology with pre-sediment and carbon-block filter, reserve osmosis filter, and post-activated carbon filter. The triple-stage technology guarantees to remove all the contaminants from the water. Its RO membrane is nothing like regular membranes available in the market. The 0.0001-micrometer filtration accuracy whips out about 99% of water pollutants, and its carbon filter improves the taste of the water

LED Display

Another impressive thing about this RO system is its LED display at the faucet. This display comes in handy to monitor the quality of the filtered water. Also, the system panel has another display that indicates the exact amount of TDS.

Highly Effective

When it comes to water waste, Waterdrop RO System produces three times less water waste than other RO systems on the market. With every gallon of filtered water, this appliance only produces one gallon of wastewater. Additionally, no tank design prevents secondary contamination that generally occurs in the storage tank.

Versatile Design

The design of the Waterdrop RO system is simply revolutionary. Having a 5.7-inch slim body with no storage tank, this system can fit anywhere and consumes less storage space. Additionally, this compact system can also be attached to your refrigerator.

Olympia Reverse Osmosis Water Filtration System (OROS-50) comes at a reasonable price and gets the job done. Manufactured in the United States, this RO system is NSF certified and uses a 5-stage filtration system to purify the water and enhance its taste. This system has a top-quality RO membrane that delivers 50 gallons of water per day.

High-Quality Water Purification

With five stages of the filtration process, OROS-50 effectively removes contaminants and impurities from the water to produce pure drinking water. Rigorously tested, this system guarantees to remove arsenic, fluoride, lead, radium 226/228, copper, and also reduces turbidity from water.

NSF Certification

The entire system of OROS-50 is NSF tested and certified. This high-quality system has been tested and certified against NSF/ANSI 42 for the removal of chlorine, taste, and odor. Additionally, it is NSF/ANSI 58 approved for effectively reducing the Total Dissolved Solids.

Easy Installation

The installation process of OROS-50 is ridiculously straightforward. With a step-by-step manual, installing the RO system has never been so easy. Also, for your convenience, it comes with a colorful tubing. The only complication you might face while installing this system is drilling the holes in the stainless steel sink drain.

All-in-One Kit

This system comes with an all-inclusive RO kit that is required while installing and operating the device. It includes three filter housings, an automatic shut-off valve, a flow restrictor, two carbon block filters, a sediment filter, RO membrane, a post-carbon filter, and a gallon tank.

The deluxe RO system of iSpring consists of a 7-stage filtration system that delivers quality, performance, and durability. The layered filtration technology of this system is precisely built around the RO membrane to remove over 1,000 types of contaminations. Unlike regular filters, the second and third filter combines both GAC and CTO to provide additional protection against harmful chemicals. It features an extensive 75 gallons per day capacity RO membrane.

Efficiency

This RO filtration system is highly efficient, with a ratio of 2:1. This means with every gallon of filtered water produced from this system, only 2 gallons of wastewater will be wasted. This efficient unit is not only cost-effective in the long run but is also better for the environment.

Filters

When it comes to the filtration system, iSpring is one of the most reliable names in the market. Its 7-stage RO filtration technology guarantees to remove up to 99% of bacteria, debris, and chemicals from water. In addition to the standard filters, this RO system also features a carbonite filter for remineralization and a red mineral filter to add ionized minerals to the water.

The additional UV Sterilization Lamp in the system provides added protection from bacteria and other microorganisms to improve the water quality.

Installation

The installation process of this RO system is easy and straightforward. If you have prior experience with DIY projects, installing this unit will be much easier. Even if you do not have prior experience, you’ll still be able to fix it by yourself. Thanks to the step-by-step instruction manual that explains the entire installation process. However, the instruction manual is not well written and is slightly tricky to follow.

This reverse osmosis system by iSpring is a six-layered unit that guarantees protection from over 1,000 types of water contaminants. Along with multiple filtration stages, the final stage of the purification process helps to re-introduce minerals back to water that is often lost during the earlier stages. This additional function helps to produce more natural-tasting water than regular water filters.

Performance

The six-stage filtration technology of this iSpring RO system removes up to 99% of water contaminants, including lead, chlorine, arsenic, sodium, and fluoride. With the additional filters, this system not only purifies the water but also restores minerals and alkaline balance.

Features

This RO system comprises of all the necessary components that are required for installation. The entire set includes premium quality components that ensure high reliability and low maintenance. It comes with a brushed nickel faucet, shut-off valve, filter cartridges, storage tank, and reverse osmosis membrane along with the system.

This RO system has a filtration capacity of 75 gallons per day. It includes both GAC as well as CTO filters. The GAC filter traps large contaminants, leaving smaller particles to pass through the CTO carbon block filter. This combination functions with maximum efficiency and lasts longer than standard filters.

Installation and maintenance

Installing this RO system is extremely effortless and straightforward. Designed for DIY users, this unit can be easily installed within an hour if you have prior experience. However, even if you have no idea how to install the system, following the instructional video from the manufacturers will do the job. It also includes a step-by-step manual.