5 Best RO Systems with Remineralization

If shopping for a water filtration system, reverse osmosis systems make a great choice. These systems can remove up to 99% of Total Dissolved Solids from your water.

Although RO systems are the best when it comes to purifying water, they also have a downside. They get rid of all essential minerals from the water, which are highly important to the body.

Therefore, when choosing an RO system for your household, you need to ensure that it comes with a remineralization filter. The filters add back the essential minerals like calcium and magnesium to the already purified water.

And since we know that picking the right RO system might be a bit overwhelming, we’ve listed the best RO systems with Remineralization that you can find in the market today.

In the guide, we’ve shared the reviews of the top 5 RO systems with remineralization and the factors to consider when buying for an RO system.

A Quick Comparison of our Favorites

  • Best Overall: iSpring RCC7AK 6-Stage Reverse Osmosis System: A 6 stage RO system that removes 99% contaminants, is space-saving, comes with an alkaline remineralization filter, produces 75 GPD, has a drain ratio of 1:3, is easy to install, and is NSF/ANSI 58 certified.
  • Best Storage Capacity: APEC Water System ROES-PH75: This unit filters water in 6 stages, removes 99% TDS, comes with a 4-gallon storage tank, has a lead-free designer faucet, is WQA certified, purifies 75 GPD, has a drain ratio of 3:1, is space-saving, easy to install and produces tasty water.
  • Best for Well Water: Home Master TMAFC Artesian Under Sink Reverse Osmosis System: A 7-stage RO filtration system with 2 pre-filters, an RO membrane and a post remineralization filter that restores minerals, has a fast flow rate, comes with a 3.2 storage tank, has long-life filters and is NSF certified.
  • Best Tankless RO System: Frizzlife PX500 Tankless Reverse Osmosis Water System: This model purifies water in 3 stages, eliminates 99.99% water contaminants, produces 500 gallons per day, has a low drain ratio of 1.5:1, connects to a refrigerator using an ice maker that is easy to clean, maintain and install.
  • Best for Small Apartments: Waterdrop WD-G2MNR-W: An RO filtration system that features an elegant tankless design, filters 400 gallons per day, has a low drain ratio of 1:1, saves water by 300%, has a smart filter life monitor, is eco-friendly, cost-efficient and easy to install.

Best Reverse Osmosis System with Remineralization

1. iSpring RCC7AK 6-Stage RO System

iSpring is a well-known water treatment company that has been in the market for more than a decade already. The company specializes in commercial, under sink and whole house RO water filters.

The iSpring RCC7AK is a 6-stage RO system exclusively designed to restore water’s mineral balance and natural alkalinity. It removes up to 99% of harmful contaminants, including arsenic, asbestos, fluoride, chlorine, lead, sodium, mercury, among others.

 The system comes with a beautiful European-style kitchen faucet and boasts a transparent 1st stage housing that helps you to inspect the sediment filter with ease visually. It also fits nicely under any standard kitchen sink hence space-saving.

The 6 stage RO system is packed with 3 extra-long filters that remove large contaminants, an Ultra fine RO filter that removes contaminants down to 0.0001 microns and a fine GAC filter for final polishing to the purified water.

RCC7AK includes an alkaline remineralization filter introduced in the last stage (6th stage) to restore the healthy minerals removed during the filtration process. It produces balanced alkalinity giving your water a more natural taste.

The RO membrane in this system can process 75 water gallons per day with waste water to filtered water ratio of 3:1.

The system is also easy to install and comes with all necessary parts for installation. You can do it all on your own by following the well-written instructions manual and instructional videos.

It is also certified against NSF 58/ANSI for TDS reduction.


  • Easy to install
  • Leak-free
  • Transparent first stage housing
  • NSF/ANSI 58 certified
  • High-quality installation parts
  • Easy-to-read instruction manual
  • Removes up to 99% TDS in tap water
  • High production capacity of 75 GPD


  • Wastes 3 gallons to produce 1 purified water gallon
  • Large footprint

2. APEC ROES-PH75 Top Tier Reverse Osmosis Drinking Water

APEC has been present in the water treatment market for almost 2 decades now. The company specializes in RO water filters and whole house water filtration systems.

The APEC ROES-PH75 is an under sink 6 stage RO system that removes up to 99% of bacteria, contaminants and solids. It also adds back in magnesium and calcium, minerals that are very essential to your health.

It comes with a 4-gallon pressurized water storage tank that holds the water before it reaches the faucet. The system has a polypropylene sediment filter for removing larger particles and double carbon block filters that remove unpleasant taste and odors.

A semi-permeable RO membrane removes 99% TDS, while the advanced carbon filter (the last filter for water to pass through) removes any lingering taste and odor that the water might have picked in the storage tank.

And since calcium is removed during the RO process, this unit uses an alkaline remineralizing calcium filter that reintroduces calcium back to the water.

The system is WQA certified and uses premium, long-lasting filters to treat tap or well water. It comes with a 100% lead-free designer faucet, JG food-grade tubing and parts to ensure that you get safe and contamination-free pure water.

APEC ROES-PH75 purifies up to 75 gallons of water per day and comes with a flow restrictor and automatic shutoff valve. These help to reduce waste water to 3 gallons for every gallon of purified water produced.

The under sink system measures 11” x 11” x 15” and can fit under any standard sink. It’s easy to install and comes with high-quality leak-free quick-connect fittings that require no extra lock clips to seal.


  • Simple DIY installation
  • Annual filter replacement
  • Has a remineralization filter
  • Saves cabinet space
  • Produces great-tasting water
  • Produces 75 gallons of water per day
  • Clear instructions


  • Wastes a lot of water
  • No air gap faucet

3. Home Master TMAFC Artesian Under sink RO System

Home Master RO systems are among the best-rated RO systems in the market today. Formerly known as Tap Master, the company is well known as one of the most innovative RO filter company in town.

Their products are made in the US and are a patented system.

The TMAFC Artesian is a 7-stage water filtration system that uses 2 pre-filters, an RO membrane and one post remineralization filter.

It has a catalytic carbon filter that outperforms ordinary activated carbon in removing chlorine, stubborn chloramines, chemicals, lead, fluoride, TDs and 1000s more contaminants.

A dedicated 5-micron depth sediment filter prolongs the life of other filters by ensuring the highest possible water pressure and reduced waste water.

After purification, the water passes twice through a remineralization filter and adds back small amounts of magnesium and calcium minerals to balance the PH level of the RO water.

This system comes in a reliable easy to use design and provides a faster flow rate. The fast flow rate results from the Fast Flo Kit, which has larger fittings and tubing.

 It boasts a 3.2-gallon storage tank and comes with NSF certified components that meet/exceed the NSF standards for material safety and performance.

The design of this system is easy to upgrade and requires filter changes once per year or every 2000 gallons.


  • Long-life filters
  • Easy to maintain
  • Double remineralization technology
  • Removes 99% contaminants from tap water
  • Faster flow rate than traditional models
  • NSF certified for material safety and performance
  • Produces great-tasting water


  • Large footprint

4. Frizzlife PX500 Tankless RO Water Filtration System

Although young in the water filter market, Frizzlife is a fast-growing brand that provides diverse water filtration systems that deliver efficient and effective water solutions. The brand has more than 10 years of experience in home water solutions.

The Frizzlife PX500 is a 3-stage RO system that comes with a composite pre-filter, post alkaline filter and a high-grade RO membrane with 0.0001-micron filtration accuracy.

The RO membrane (ASR313-500G) eliminates 99.99% contaminants from the water, including TDS, chlorine, limescale, lead and other heavy metals. The pre-filter (ASR311) prolongs the service life of the reverse osmosis membrane while the post alkaline remineralizes the pure water.

The system has a high capacity of 500 GDP and takes up less space under the counter. It can serve your family with pure water filling a cup within 12 seconds.

Moreover, the system produces less waste water and has a drain ratio of 1.5:1.

One major selling point of this unit is that you can easily hook it up to a refrigerator. All you need is an IMC-1 icemaker connection kit to get everything done.

PX500 is easy to install following a comprehensive instructional user manual or an easy step-by-step installation video. It comes with filters loaded and everything needed for installation.

A filter life monitor embedded in the operation panel informs you when a filter replacement is needed.


  • Low drain ratio of 1.5:1
  • Easy to hook up to a refrigerator
  • High capacity of 500 gallons per day
  • Removes 99.9% of contaminants
  • Easy DIY installation
  • Fewer leakage concerns
  • Fast flow rate
  • Tankless hence space saving


  • Expensive

5. Waterdrop WD-G2MNR-W

Waterdrop is one of the best manufacturers in the water purifiers industry. It has actually become the preferred choice for millions of families worldwide because of its top quality products.

The Waterdrop WD-G2MNR-W RO system removes the most harmful contaminants from the water. It comes with an MRO composite filter that removes TDS, heavy metals and fluoride, among others.

The system also uses a CF composite filter to remove large particles from the water. To add beneficial minerals to the purified water, WD-G2MNR-W uses an external mineral water filter.

This unit follows the exact ratio between microelements and adopts natural materials to restore essential minerals like calcium and magnesium.

With a fast and stable water flow of 400 gallons per day, this model lets you fill a cup of water within 12 seconds. It also has a low drain ratio of 1:1 and saves waste water by 300%.

The G2 comes in a tankless design hence avoids harmful contaminants breeding. It is also designed to be smaller than conventional ROs, thus space-saving.

It is also easy to install and maintain since you can complete replacing a filter within seconds without using any tool. DIY installation of the whole system can be done in an hour.

This unit also boasts a smart filter life reminder with 3 colors that show the status of the filter. Blue means that the filters are functioning well, purple indicates that you need to replace the filters soon, and red means replacing the water filters immediately.


  • Fast water flow rate of 400 GPD
  • Low drain ratio of 1:1
  • Saves water by 300%
  • Easy to clean and maintain
  • Easy to install
  • Comes with a filter life monitor
  • Elegant tankless design
  • Eco-friendly and cost-efficient


  • A little noisy

Factors to Consider when buying an RO System

Best RO System with Remineralization
  • Waste Water

With a reverse osmosis system, not all water pumped in comes out through the other side. Only a small percentage of the water is filtered, and the rest is considered waste.

If possible, avoid units with 75% more waste, especially when treating a large volume of water. Always select the unit with the lowest drain ratio possible. If you can get one with a ratio of filtered water to waste water ratio of 1:1, the better.

  • Water Pressure

The Ro process in water filtration systems only works effectively when enough pressure is applied. The pressure forces the water through the RO filter (semi-permeable membrane) to the other side.

Ensure that the unit you get for your home has a pressure of around 60 psi for high functionality.

  • Water Source

The source of your water might affect how an RO process works. This will depend on the type and amount of water contaminants it contains.

For instance, if your well water has more contaminants, it’ll take more time for the unit’s semi-permeable membrane to filter all contaminants than it would with municipal water.

  • Remineralization Needs

During the RO filtration process, some essential minerals like magnesium and calcium are lost. These minerals are good for your health and although you can obtain them from other sources, getting g them through drinking water is much easier.

After all, you drink water daily, right?

Since RO removes these minerals from the water, be on the lookout for one that comes with a remineralization filter to help you restore the minerals.

  • Storage Capacity

You need to get an RO system with a storage tank that can store enough water to accommodate your needs. You can’t go for a smaller unit when you have a large family.


Choosing the right RO system for your home is very important. Keep in mind that RO systems are not the same. Some come with a different number of filters, some are of high quality while others are cheaply made and some waste a lot of water.

Take all the differences into account when selecting the best reverse osmosis system for your home. And with the different models listed above, we believe that you’ll find a good match.


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