Best Whole House Reverse Osmosis System: 2021 Reviews

Why Have a Whole House Reverse Osmosis System?

Reverse osmosis is a common form of water filter that can deliver high-quality, safe, and delicious drinking water. It works by forcing water through a partially permeable membrane, eliminating pollutants and making the water clean and safe to drink.

Contaminants such as lead, arsenic, chemicals, viruses, germs, total dissolved solids, and others are removed by the best whole house reverse osmosis systems.

With this extensive guide, you can read my best whole house reverse osmosis system reviews and discover how to choose one for your unique needs!

Best Whole House Reverse Osmosis System in 2021 Review

1. AquaTru Countertop RO System

The AquaTru Countertop Water Filtration Purification System is an NSF-certified under-sink whole house reverse osmosis system that removes toxins, hormones, microplastics, carcinogens, and other impurities from unfiltered drinking water.

This RO water system is convenient for both home and workplace use, with four filter stages, including the all-important whole house reverse osmosis process, and takes only minutes to set up. The AquaTru is one of the most convenient countertop water filtration devices available, requiring no plumbing or installation.

There’s no need to guess when it’s time to change the filters; the machine’s digital display will alert you when it’s time. This whole house reverse osmosis system is sleek and compact in design, and it checks all the boxes in terms of visual appeal.

The water purifier is one of the more efficient whole house reverse osmosis filter systems in terms of water waste, especially when compared to a normal under sink design.

While traditional systems normally waste 3 gallons of water for every 1 gallon generated, the AquaTru wastes only around 25% of the water produced by the whole house reverse osmosis process.

If you want some assurance about the functioning of your water filters, AquaTru offers a money-back guarantee as well as a 1-year warranty.

When compared to conventional under sink RO systems, which typically use a 1:4 water ratio, the AquaTru is more efficient, wasting just about 25% of the water throughout the RO process. This guarantees that filters may be flushed out continuously, increasing their life.

2. Waterdrop WD-G3-W

The Waterdrop WD-G3-W is a 400 GPD fast flow tankless whole house reverse osmosis water filtration system that successfully eliminates fluoride, limescale, heavy metals, and other total dissolved solids from drinking water.

This efficient water system works faster and wastes less water during the RO process than other whole house reverse osmosis filters since it has a 1:1 pure water to drain ratio. The method does not utilize a storage tank, which prevents secondary water pollution, and instead generates pure filtered water instantly at the touch of a button, ready for drinking.

The device may be readily installed in an under-sink area, freeing up more cupboard storage space. The internal pump of the system generates filtered water at a rate of 400 gallons per day, filtering a cup of water in about 12 seconds.

Because the Waterdrop WD-G3-W lacks a water storage tank, water must be created and sent directly to the faucet when it is switched on.

The system includes an integrated booster pump that provides the optimal pressure for speeding up the RO process, filling a standard-size glass with clean drinking water in around 12 seconds.

The Waterdrop RO is significantly more efficient than a conventional RO system without a booster pump, operating at a clean water to wastewater ratio of 1:1.

While typical RO systems waste 4 gallons of water for every gallon generated, the Waterdrop WD-G3-W wastes only one gallon for every gallon produced.

It is important to note that, while the system is more efficient and ecologically beneficial in general when it comes to water production, the user is required to flush it with water for 30 minutes after it is first installed. This water is not fit for drinking, and the company suggests using it for anything else, such as watering flowers.

The Waterdrop RO WD-G3-W has three filters that work together to deliver seven stages of the whole house reverse osmosis water filtration system.

3. APEC ESSENCE ROES-PH75​

The APEC ESSENCE ROES-PH75 whole house reverse osmosis system eliminates up to 99 percent of germs and other contaminants from drinking water in six stages.

Among other things, the equipment includes a 3-stage pre-filter set, a lead-free faucet, and a storage tank. The APEC Essence contains added calcium and magnesium minerals from a food grade calcium alkaline inline filter to improve the alkalinity, taste, and odor of the filtered water.

With a 2-year manufacturer’s warranty extension. It has a waste water ratio of 1:3, which is significantly greater than the normal 1:4 ratio used in whole house reverse osmosis systems.

The APEC ROES-PH75 system is one of the most comprehensive reverse osmosis systems water treatment options available, with 6 stages of whole house water filter system.

The system has a feed water pressure of 40 to 85 PSI, which can be increased if necessary using a booster pump. In this system, a pressure of 60 PSI produces water at a 1:3 water ratio, which means that for every gallon produced, 3 gallons is lost down the drain. This is slightly more efficient than the normal 1:4 RO water ratio.

The APEC Essence is a simple, low-cost water filtering equipment for anyone looking to increase the purity of their water supply while retaining the alkaline taste.

4. iSpring RCC1UP-AK

The iSpring RCC1UP-AK is a high-quality reverse osmosis system that filters water through seven stages to eliminate pollutants and remineralize it for alkalinity.

The iSpring RCC1UP-AK uses a high efficiency booster pump to apply additional pressure, minimizing backflow, which can sometimes lead to slower pure water output in other under-sink whole house RO processes. This, in turn, decreases water waste during the whole house RO system and allows the water storage tank to fill to capacity more quickly.

This whole house RO system includes a high-tech UV laser filter kit that kills up to 99 percent of germs and viruses from polluted sources. This allows you to use well water, lake water, stream water, or even contaminated city water in the iSpring RCC1UP-AK with confidence that the whole house RO water generated is clean and safe to drink.

If the whole house water pressure is lower than the necessary 60 PSI, the performance of a conventional whole house reverse osmosis system may suffer, resulting in slower output of filtered water and more water waste.

The iSpring RCC1UP-AK includes a built-in booster pump that raises the water pressure traveling through the membrane to the ideal level. As a result, water pressure at the source is no longer an issue, and the iSpring RCC1UP-AK can create whole house RO water more quickly and with less waste.

The normal iSpring RCC7-AK filters water at a 1:3 ratio, whereas the RCC1UP-AK filters water at a 1:1 ratio. This indicates that one gallon of water is lost for every gallon produced. The efficiency of ordinary RO systems without a booster pump is substantially lower than that of the iSpring RCC1UP-AK.

The filtered water to water waste ratio in the system is 1:3 – for every gallon of refined water produced, 3 gallons are lost.

5. Home Master TMHP HydroPerfection

The Home Master TMHP HydroPerfection is an under sink RO system that removes up to 98 percent of total dissolved particles from a drinking water supply using advanced whole house water filter systems and purification steps.

The Home Master TMHP HydroPerfection removes typical water impurities such as iron, chemicals, heavy metals, and other debris using innovative, long-lasting filters. The system can create 2000 gallons of water before needing to be replaced.

The Home Master TMHP HydroPerfection has an integrated UV filter that kills germs in water without the use of dangerous chemicals. The filter allows this device to be used with regular whole house water or well water.

For better tasting, less acidic water, the Home Master TMHP HydroPerfection remineralizes its generated water by adding calcium and magnesium twice throughout the purification process.

A permeate pump boosts pressure in this whole house reverse osmosis filtration system. In the typical system, the waste-to-pure ratio is 4:1, or 1:1 with a permeate pump.

The Home Master TMHP HydroPerfection incorporates several technologies that improve RO efficiency and reduce water waste. When combined with a permeable pump, the system generates water at a waste-to-production ratio of 1:1, which means that for every gallon produced, 1 gallon is wasted.

This is considerably superior to the normal RO water ratio of 1:4, which wastes 4 gallons of water for every gallon generated.

To function, the system requires a minimum whole house pressure of 40 PSI. When the water pressure is this high or greater, the permeate pump may create RO more quickly. Whole houses with less than 40 PSI water might consider acquiring a booster pump to increase efficiency.

This system cleans water thoroughly and removes impurities and toxins through nine stages of filtration, purification, sterilization, and improvement.

6. APEC Water Systems RO-90 Ultimate Series​

The APEC Water Systems RO-90 Ultimate Series Top Tier reverse osmosis water filter is a certified point-of-use reverse osmosis water filter that provides ultra-safe pure drinking water.

This water filtration system incorporates five total stages for efficient water filtration, including a super capacity sediment filter, two carbon blocks, a semi-permeable RO membrane, and a refining coconut carbon filtering cartridge.

The APEC RO-90 Ultimate Series Top Tier, designed, developed, and assembled in the United States, has a WQA Gold Seal certification for removing up to 99 percent of all pollutants in drinking water, including chlorine, arsenic, lead, heavy metals, and many others.

For the most thorough and effective water purification, the APEC RO-90 has five separate filtering stages, including the reverse osmosis process itself. The reverse osmosis method eliminates up to 99 percent of total dissolved solids from water, while the subsequent filtration steps remove bigger particles and chemical pollutants.

In the APEC RO-90, the filtered water to wasted water ratio is 1:3, which means that for every gallon of filtered water, 3 gallons are wasted. The greater the pressure inside the machine, the faster the tank will fill and the less water will be wasted.

This system can run at pressures ranging from 40 to 85 PSI, although it is advised that your unit pressure be at least 60 PSI to ensure minimal water waste. If necessary, you might purchase a pump booster to increase pressure.

With a two-year manufacturer’s warranty, registration, and excellent customer support, this RO machine ensures clean drinking water for improved health.

7. Express Water 10 Stage RO Mineralizing Water Filter

The Express Water Reverse Osmosis Filtration System has ten stages of water filtration and creates the cleanest, healthiest alkaline water without the undesirable chemical pollutants and pollutants.

This sophisticated RO system not only removes up to 99 percent of chemicals and pollutants from water, such as arsenic, lead, chlorine, fluoride, and bacteria, but it also remineralizes the water with calcium, magnesium, potassium, and other beneficial minerals your body requires from healthy alkaline water.

The Express Water Reverse Osmosis Filtration System’s simple design allows users to set up the system themselves, saving money on expert installation.

This RO system comes with a one-year warranty and automatically replenishes its pure water tank anytime the water level falls below full, eliminating the need to manually refill or activate the device.

The Express Water 10-Stage Reverse Osmosis System has a water pressure range of 40-80 PSI, depending on the temperature, type, and flow of the drinking water entering the system. In general, a water pressure of 60 PSI is ideal for optimal water flow, minimal waste, and faster tank refill. If water flow is lower than typical, users may need to purchase a booster pump to maximize efficiency.

Depending on the water pressure inside the unit, this RO system has a 1:3 or 1:4 ratio. This means that for every gallon of water produced, three or four are lost down the drain. The 1:4 ratio is normal for all reverse osmosis systems that lack an integrated function for increasing RO efficiency.

The system can filter up to 100 gallons of water every day, ensuring that water is always ready to flow from the faucet as needed by the user. If a suspected leak is identified, the system features a built-in leak stop valve that cuts off water flow.

8. Global Water RO-505​

The Global Water RO-505 is a 5-stage RO system with four additional filters that removes up to 99 percent of pollutants from drinking water such as chlorine, bacteria, and lead.

The quick connect connectors on the filter unit make installation straightforward and secure. The system works with a regular whole house water pressure range of 40 to 80 PSI, with a pressure of 60 PSI giving the least water waste and the quickest tank refill time. The filters and RO membrane have a purification capacity of up to 50 gallons per day.

A sediment filter, a GAC coconut shell filter, a coconut shell filter, a RO membrane, and an inline filter are all included in the system’s setup, which removes larger particles of sand and dust, chemicals and odors like chlorine, heavy metals, bad mineral substances, and any other rough taste and odor from water.

Filters should be replaced every six months to a year, depending on the water quality and level of use. Because the system includes an extra set of filters, the first replacement will be free.

The Global Water RO-505 is one of the more efficient, modern RO systems on the market, thanks to its flow restrictor and automated shut-off valve. When the tank is full and the reverse osmosis process is not taking place, the automatic shut-off valve prevents water wasting by preventing the system from pouring water down the drain.

The flow restrictor on the Global Water RO-505 raises pressure during reverse osmosis, forcing water through the semi-permeable membrane and preventing it from returning the way it came. This decreases wastewater production and shortens the time it takes to replenish the tank.

The RO unit works best at a pressure of 60 PSI while operating at a water pressure range of 40-80 PSI. One gallon of water is created for every three gallons of water utilized. It can take up to two hours for the tank to reach full capacity.

This system is NSF tested and approved, and it is manufactured in the United States. The water ratio of the system is 1:3, which is greater than the usual RO water ratio of 1:4.

9. Greatwell 400 GPD​

The Greatwell 400 GPD is a tankless reverse osmosis water filter that produces pure drinking water while reducing wastewater by up to 450 percent.

The Greatwell 400 GPD may be simply stowed in a typical under sink space because to its seamless design, leak-proof water route, easy-change filters, and slim body. This system looks stylish and saves countertop or cupboard space because to its all-in-one tankless design.

The RO system achieves thorough filtering results thanks to a three-stage water purification whole house water filter system that removes up to 99 percent of over 100 contaminants commonly found in unfiltered drinking water, such as lead, chloramine, fluoride, bacteria, salt, and viruses.

The Greatwell 400 GPD features premium quality components that are built for efficiency and longevity, as well as a one-year limited manufacturer’s guarantee and lifelong technical support from top customer care. All materials are FDA-approved and NSF-compliant.

The Greatwell 400 GPD features a fast water flow of roughly 0.3 to 0.4 gallons per minute and uses a booster pump for maximum RO. Despite the fact that the system lacks its own water tank, a user will not have to wait for water to be generated.

Wastewater exits the drain line only while the RO process is running, contributing to a waste-to-water ratio of around 1:5:1. According to the producers, the Greatwell 400 GPD can save up to 450 percent on water waste.

Filters will need to be replaced every 6 months to a year and will cost roughly $100 in total.

10. NU Aqua Platinum Series

The NU Aqua Platinum Series is a large capacity 5 stage reverse osmosis water purifier that provides clean, delicious, and healthy water on demand. This RO device generates pure drinking water at twice the output speed of a normal RO system, with a flow rate of 100 gallons per day.

The NU Aqua Platinum Series comes with a PPM meter to assess the quantity of total dissolved solids left in the water after the reverse osmosis process for consumers who want to assess the quality of their filtered water.

The high capacity system cleans water through five stages: sediment filter, carbon GAC filter, carbon block filter, reverse osmosis membrane, and post filter. When these steps are combined, the system can remove up to 99 percent of the more than 1,000 pollutants found in drinking water, such as arsenic, lead, fluoride, chlorine, and bacteria.

The NU Aqua Platinum Series generates RO water at a rate of around 1:2, creating 1 gallon of purified water for every 2 gallons of wasted water, depending on the pressure of domestic tap water.

The NU Aqua Platinum Series removes over 1,000 pollutants from domestic drinking water through 5 separate water filtering stages, including reverse osmosis.

The use of clear sediment housing allows consumers to observe pollutants being removed. The integrated PPM meter can be used to check TDS levels in water.

The NU Aqua Platinum Series generates water with a pure water-to-wastewater ratio of about 1:2. This indicates that for every gallon of water produced, two gallons are wasted, which is a better average than the normal 1:4 ratio for most RO systems.

Incoming water pressure may have an impact on the efficiency of this RO system. To reduce water waste and speed up the flow of water into the holding tank, a user should ensure that their incoming pressure is between 40 and 70 PSI.

If necessary, a booster pump can be purchased to increase incoming water pressure.

While this is less than the typical measurement of 1 gallon of water for every 4 gallons of water wasted for most RO systems, if you have low water pressure or pressure lower than the necessary 60 PSI, you can install a booster or permeate pump.

11. Olympia Water Systems OROS-50

The Olympia Water Systems OROS-50 uses a 50 GPD membrane to generate pure water. The NSF has verified the whole house water filter system for effectively lowering chlorine, taste, odor, and total dissolved solids.

Five steps of filtration, including two rounds of carbon filtering, provide for the most thorough removal of pollutants from drinking water. The Olympia Water Systems OROS-50 generates clean RO water at a 1:4 ratio using whole house water pressure ranging from 50 to 100 PSI.

This indicates that for every gallon of clean RO water generated, 4 gallons of water are lost, which is the usual ratio for most RO systems without a booster pump. The Olympia Water Systems OROS-50 uses a 50 GPD membrane to generate pure water.

The NSF has verified the whole house water filter system for effectively lowering chlorine, taste, odor, and total dissolved solids. Five steps of filtration, including two rounds of carbon filtering, provide for the most thorough removal of pollutants from drinking water.

The Olympia Water Systems OROS-50 generates clean RO water at a 1:4 ratio using whole house water pressure ranging from 50 to 100 PSI. This indicates that for every gallon of clean RO water generated, 4 gallons of water are lost, which is the usual ratio for most RO systems without a booster pump.

The whole house water filter system only wastes water when creating RO water, and then the water is turned off to avoid waste.

12. Whirlpool WHER25

With an extra long-life filter and a RO membrane that lasts for years, this osmosis water filter system is designed for prolonged use between filter changes. The osmosis water filter system alerts the user when filters need to be changed, assuring continuously clean water output.

The Whirlpool WHER25 under sink RO system has a space-saving design and a tiny footprint, so it won’t take up too much room. The whole house water filter system can be linked to a coffee maker, refrigerator, or ice maker to offer high-quality water for all tastes.

Users seeking quality assurance will appreciate the fact that the Whirlpool WHER25 is made in the United States and NSF certified, which means it has been third-party tested to guarantee it functions as stated by the manufacturer.

The Whirlpool WHER25 has extra long-life filters for greater performance for a longer period of time.

In terms of water waste to water production, the system has a 1:4 filtered water to wastewater ratio, which is typical of most ordinary RO systems that do not employ a pump.

This indicates that the system will squander 4 gallons for every gallon of water produced by the reverse osmosis process. Users can purchase a booster pump to accelerate the passage of water through the system’s RO membrane, hence minimizing water waste.

The Whirlpool WHER25 can produce up to 18.46 gallons of water per day with an incoming water pressure of 40 to 80 PSI. The RO membrane in the system is substantially larger than normal RO membranes, allowing for more complete water filtering during reverse osmosis.

The Whirlpool WHER25 can remove a variety of contaminants from water, including lead, barium, TDS, chlorine, minerals, chemicals, sulphide, and other pollutants.

The system includes WHEERF pre and post filter cartridges that must be replaced every 6 months, as well as a WHEERM membrane that must be replaced every 2 years. The system uses a filtered water-to-wastewater ratio of 1:4.

13. Brondell Circle Reverse Osmosis System

The Brondell Circle Reverse Osmosis System is a stylish, modern reverse osmosis water filter that delivers high-quality filtered water while reducing water waste.

This system is meant to provide optimum water filtering by removing industrial and dangerous pollutants such as pesticides, herbicides, fluoride, lead, radium, and a variety of other compounds, as well as any undesirable tastes or odors from water.

The system’s smart valve, which incorporates unique water-saving technology, eliminates back pressure, which is the leading source of inefficiency in most typical reverse osmosis systems. This ensures that the system can produce more water while wasting less water.

The Brondell Circle RO System is quite compact in form and fits comfortably beneath a kitchen sink. It is easy to install and maintain, and everything needed for installation is included. The faucet’s built-in LED water filter change indication can notify you when it’s time to change the filter, allowing you to keep the unit running efficiently for longer.

The Brondell Circle Reverse Osmosis Water Filtration System is one of the most efficient reverse osmosis filtration options available, thanks to its clever valve and flexible reservoir. Most common under sink systems have a 1:3 or 1:4 water-to-production ratio, squandering 3 or 4 gallons for every gallon generated.

The Brondell Circle prevents water backflow, which commonly results in increased water waste, improving efficiency and speeding up the water tank refill process. In this reverse osmosis device, approximately 2.1 gallons of water are required to produce 1 gallon of clean, pure water.

Filters should be changed every 6 to 12 months, depending on the level of use and the type of water. The tank must be flushed before use, but no additional cleaning is required.

How Do Whole House Reverse Osmosis Water Filtration Systems Work?

Let’s take a closer look at reverse osmosis water filters.

Untreated water enters the RO filter tank first, passing through a mixture of carbon and 5-micron sediment filter cartridges. The carbon filter’s function is to remove contaminants from the water, such as chlorine or fluoride from well water or municipal water.

Simultaneously, the 5-micron sediment filter removes the bigger sections of the sediment in the water that could damage the semipermeable membrane later in the filtration process.

The RO membrane is extremely dense, making it difficult for water to get through. It removes all bigger particles, leaving only high-quality drinking water. The process is continuous: the systems feed water into one end, which flows out the other end, where wastewater is discharged through a drain.

When the filtered water reaches the tank for storage, you can utilize it by turning on the faucet. When this occurs, the now-high-quality water runs from the tank via one more carbon filter before reaching the faucet located at your kitchen sink.

The Reverse Osmosis Filter System: Step By Step

Typically, reverse osmosis water filters operate in a five-step procedure. When RO systems claim more than five processes, it means the producer has divided one of these five into sub-processes. Here’s a basic rundown of how the procedure works.

  1. Sediment removal — Sediment removal is required before water can pass through the semi-permeable membrane in RO systems. At this stage, sediment filters remove charge particles from your water, including sand, dirt, and rust.
  2. First carbon filter – This filter will remove impurities that would otherwise damage the semi-permeable membrane, such as chlorine and other chemicals. It can also improve the odor and flavor of the water, as well as remove certain pesticides and tiny particles that may pass through the semi-permeable membrane with the water.
  3. Second carbon filter – For maximum efficiency, it is becoming more usual for RO systems to include at least a second filter. A second carbon filter will assist in removing the highest number of particles.
  4. Reverse osmosis membrane (RO membrane) – The RO membrane is important to all reverse osmosis systems. Water molecules can travel through the membrane under pressure because it has thousands of microscopic holes, but larger pollutants remain behind.
  5. Impurities are removed — Because impurities exit RO systems via a separate pipe, there is no chance of the particles reentering the cleansed water.
  6. Remineralization – Consider adding a remineralization filter to your RO system, which can add vital minerals like calcium and magnesium, balancing the pH and improving the flavor of the water.
  7. Optional step: UV light filter systems – Adding a UV lamp to your RO system is an optional step. A UV light’s goal is to ensure that your water is clear of microorganisms, further increasing water quality.

Conclusion: What’s The Best Wholse House RO System?

We propose our selection as the finest overall. The iSpring RCS5T Reverse Osmosis Water Filter System has five stages of reverse osmosis water filtration system and can generate up to 500 gallons of water per day with minimal waste.

The filter is simple to replace, and it comes with a booster pump and a faucet. The APEC ROES-PH75 Reverse Osmosis Water Filter System is our best value pick, and it’s ideal for anyone who wants something as good as our top option but doesn’t need as much water. This equipment has six stages of a whole house reverse osmosis water filtration system but only produces roughly 75 gallons of water per day.

We hope you have found a brand that you like after reading our reverse osmosis evaluations. If these whole house reverse osmosis system reviews have helped you understand more about reverse osmosis and how these devices work, please share them on Facebook and Twitter.

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