iSpring RCC7AK 6-Stage Reverse Osmosis System

The iSpring RCC7AK is an upgraded version of the RCC7 model with the addition of a nice extra filter. It can filter out all types of contaminants and enrich the water in the same process giving you a healthier, natural-tasting, clean drinking water.

This is our pick for the best under sink reverse osmosis system.

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Excellent Filtration Process

The iSpring RCC7AK Reverse osmosis system features a multi-layered filtration process designed around 6 very efficient filtration stages specially tailored to progressively remove all types of contaminants and improve the water quality.

The first three stages are pre-filters consisting of polypropylene sediment filter in the 1st stage, GAC filter in the 2nd stage and a carbon block filter in the 3rd stage.

These three filters trap all the sediments and particles that are larger than 5 microns and more importantly removes chlorine, chloramines and other chemicals present in the water.

The fourth stage where the magic happens sits a quality RO membrane which eliminates all the remaining contaminants down to 0.0001 microns leaving behind only pure water.

A fine GAC filter takes the fifth stage and where the water from the RO tank is further polished to remove any residual contaminants from the tank.

Restoration of Lost Minerals

After going through the initial 5-stage RO filtration process, the RCC7AK includes a 6th stage which consists of an alkaline remineralization filter.

The standard 5 stages produce clean, pure water with all the contaminants removed as well as the few helpful minerals present in the water.

This 6th stage is a big plus as the alkaline filter restores the healthy minerals lost due to the RO process. The AK filter features red mineral stones which add back calcium and other essential minerals such as magnesium and potassium.

The filter also has a calcite portion that helps raise the pH levels of the RO water hence creating a much natural alkaline balance in the water.

Therefore, you not only get the benefit of drinking clean, purified water but you are also assured of getting some healthy minerals as well and a better, more natural taste.

RO water is so pure and as such it often tastes unnatural, but with this alkaline filter in place, your water will certainly taste much better.

Furthermore, the filter is made up of only natural mineral stones that serve as the filtration media hence your body will have no problem absorbing the restored minerals directly.

Filtration Capacity

The filtration capacity of RO membrane of this iSpring RCC7AK model is also quite decent for an under-sink residential RO system.

It’s capable of producing up to 75 gallons of filtered water a day which is sufficient to handle the water needs of small to medium-sized families whether it’s drinking or cooking.

Moreover, the system is relatively efficient as for each gallon of pure water produced, it wastes only 2 gallons which is really a mean feat for most filtration systems.


  • Efficient filtration process ensures crisp, clean, drinking water
  • Restores healthy minerals to the water and improves its pH balance
  • Decent filtration capacity and pure to wastewater ratio
  • Durable stainless steel construction 
  • Easy installation with a convenient noise-free operation
  • Backed by one year warranty plus a one-year money-back guarantee


  • That automatic shut off valve seems a bit flimsy
  • May need some DIY skills for easy installation

Price & Rating

ProductiSpring RCC7AK 6-Stage Reverse Osmosis System
Rating4.6 out of 5 stars (More than 1970 reviews)
Recommended price198 USD (Check the latest price at

Read moreiSpring RCC7AK 6-Stage Reverse Osmosis System

[Home Master] Tapmaster TMAFC Reverse Osmosis System

The Home Master TMAFC reverse osmosis system is a revamp from Home Master’s standard RO systems as it comes with new features that greatly boost its performance.

It’s a quality RO system that effectively filters and remineralizes the source water to produce safe, clean, and better-tasting drinking water. This is our top pick under Home Master’s full contact under sink RO systems.

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Filtration Process

The TMAFC is an under sink RO system designed to provide a 7-stage filtration process using only three physical filters and a reverse osmosis membrane. This is made possible by the full contact technology which has multiple stages that bring about the 7 phases of filtration.

In the 1st stage is a 5-micron quality sediment pre-filter that traps larger particles that are visible to the naked eye. It removes dust, sand, silt, rust and other particles and sediments that are likely to clog the subsequent filter stages.

The 2nd stage consists of a 5-micron granular activated catalytic carbon pre-filter which is a powerful filtration media that removes most of the chemical contaminants like chlorine, pharmaceuticals, and VOCs. It clears out cloudiness, unpleasant tastes, odor and even persistent disinfectant chemicals like chloramines.

In stage 3 sits a 0.0001-micron RO membrane which removes up to 99% of the remaining contaminants in the water.

This very effective membrane will remove fluoride, nitrates, total dissolved solids, cysts, and heavy metals like lead, arsenic, chromium and many other contaminants that pose potential health effects.

Stage 4/5 is a combination of an artesian remineralization medium and a 5-micron coconut shell granular activated carbon post-filter. Here the RO water is further polished by removing any residual chlorine, VOCs and other chemicals.

The refined RO water is then enhanced by the remineralization medium in the same stage. The medium consists of crushed marbles that restore natural calcium and magnesium minerals to the refined RO water thereby raising its alkalinity level before it’s delivered into the holding tank for storage.

From the RO tank, the water goes through a 6th/7th stage where one last filtration and enhancement is done by the carbon post-filter and the artesian remineralization medium.

This last stage clears out any remaining odor and tastes from the RO tank while giving the water one more small addition of calcium and magnesium minerals before it’s delivered to the faucet.

Full Contact Technology

As I mentioned above, the last four stages of the TMAFC are made possible by Home Master’s patented Full Contact Technology. It’s the top feature that sets apart all of Home Master’s RO systems under its full contact series.

This technology allows the system to circulate the purified water through the artesian and carbon filter twice. Once when moving to the RO tank, and once again when moving from the RO tank to the faucet.

This process of remineralizing the water twice is what makes this TMAFC model and the other Home Master full contact systems more robust compared to most of its competitors.

It restores enough minerals to produce clean, pure water with much better-balanced pH levels of around 7.5 to 8.0. In other words, it will certainly give you a cleaner, mineral-rich drinking water that has a fresh natural taste.  

Moreover, the full contact remineralization technology helps prevent the degradation of the RO storage tank.

The filtered water from the RO membrane is usually slightly acidic and when it sits in the storage tank, it attacks the rubber bladder and even dissolves some of it. This degradation often ends up affecting the taste of the water.

Therefore, the inclusion of the remineralization stage between the RO membrane and the tank is a big plus that not only reduces the acidity of the water but also helps prevent the degradation of RO tank and prolongs its lifespan.

Filtration Capacity

The Home Master TMAFC can deliver up to 50 gallons of pure water a day, so it’s much ideal for small or medium-sized households.

The downside though is that the system is not that efficient as the wastewater produced is a little above the usual standard.

Like the Home Master TM model, the unit generates 4 gallons of wastewater for each gallon of clean water produced. This ratio may, however, vary based on the pressure of the source water. The higher it is, the less water wasted.


  • Eliminates up to 99% of all contaminants
  • Full contact technology facilitates optimum remineralization
  • Produces purified pH balanced water that tastes fresh and natural
  • An average production rate of 50 GPD suitable for small families
  • Pre-remineralization stage ensures less storage tank degradation
  • Simple and quick to set up and change filters and membrane
  • Backed by a 5-year limited warranty


  • Wastes up to 4 gallons of water to produce a gallon of clean water

Price & Rating

Product[Home Master] Tapmaster TMAFC Reverse Osmosis System
BrandHome Master
Rating4.8 out of 5 stars (More than 580 reviews)
Recommended price280 USD (Check the latest price at

Read more[Home Master] Tapmaster TMAFC Reverse Osmosis System

APEC Essence ROES-50 Reverse Osmosis System [50 GPD]

Opening our list is the ROES-50 which is arguably one of APEC’s best and most popular under sink RO systems within the essence series.

Despite being a basic model, the ROES-50 is a very efficient unit offering great contaminant rejection rates and reliable performance at a highly competitive price.


  • Reasonable price
  • Remove up to 99% of contaminants
  • WQA Certified System

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Filtration Process

The APEC Essence ROES-50 uses a 5-stage RO filtering process to effectively purify tap water and make it clean and safe for drinking and cooking.

The 1st stage of the system involves a quality 5-micron sediment filter made from polypropylene. This first filter does well to remove sediments and fine particles in the water which include dust, sand, silt, rust, scale and other large contaminants that are visible to the naked eye.

The sediment filter is followed by APEC’s 5-micron carbon block filter in the 2nd stage which gets rid of chlorine, chloramines, bad taste, odors, colors, VOCs and other chemicals.

The 3rd stage is another 10-micron carbon block designed to further remove any residual chlorine, bad taste, odors, and chemicals. 

These double carbon blocks (in the 2nd and 3rd stage) have extremely large surfaces which maximize contact time making the ROES-50 very efficient in attaining the maximum possible chlorine and chemical removal in tap water.

The 4th stage in the unit features a 0.0001-micron Thin-film Composite (TFC) membrane which has a high contaminant and TDS (total dissolved solids) rejection rate of up to 99%.

This high-quality membrane will remove all kinds of contaminants in the water such as arsenic, chlorine, chromium, bacteria, viruses, lead, toxic fluoride, radium, VOCs and overall TDS.

The last stage features a coconut shell carbon filter and this performs the final polishing by getting rid of any residual taste and odor from the RO storage tank to ensure the water delivered to the faucet is totally free of contaminants, odorless and has a smoother taste.

Filtration Capacity and Efficiency

The ROES-50 system is capable of producing up to 50 gallons of filtered water a day. The rate may, however, vary based on the temperature and pressure of your source water but it will be sufficient for small to medium-sized homes.

Furthermore, the unit comes with a 4-gallon holding tank. It’s slightly larger when compared to similarly priced models and will ensure a steady supply of clean water without long waiting times.

In terms of filtration efficiency, the ROES-50 wastes around 3 gallons of water for every gallon of purified water it produces. This is a little bit above the average 2:1 ratio of most other models but it will not spike your water bills by large a margin.


  • Removes 99% of contaminants in source water
  • Produces 50 gallons of filtered water per day
  • Large holding tank for a steady supply of water
  • Easy to install with leak-free quick connect fittings
  • Long-lasting filters requiring low maintenance
  • Comes with 1-year limited warranty


  • Produces slightly more wastewater
  • Low source water pressure may affect the filtration capacity

Price & Rating

ProductAPEC Essence ROES-50 Reverse Osmosis System [50 GPD]
BrandAPEC Water
Rating4.7 out of 5 stars (More than 360 reviews)
Recommended price190 USD (Check the latest price at

Read moreAPEC Essence ROES-50 Reverse Osmosis System [50 GPD]

APEC Portable Reverse Osmosis System [RO-CTOP]

The RO-CTOP is another excellent countertop RO system from APEC. It’s a hassle-free, portable unit that offers nothing but convenience and ease of use.

Like the RO-OCTOP-PH, APEC has designed two versions of the RO-CTOP model, one without casing (RO-CTOP) and another without casing (RO-CTOP-C). In this review, we look at the latter version, the RO-CTOP-C.


  • Tankless
  • Produce 90 gallons of water in a day
  • No installation is required

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Filtration Process

The RO-CTOP-C utilizes a 4-stage RO filtration process that features the powerful filters and membrane found in APEC’s under-sink residential systems.

Stage 1 is occupied by a sediment filter made from polypropylene and it does well to trap dirt, silt, sand, rust and every large particle that’s bigger than 5 microns.

It’s followed by a coconut shell activated carbon filter with a large surface area that helps to efficiently get rid of chlorine, chloramines, odors, cloudiness, colors and unpleasant taste. The filter as well removes other common chemicals and VOCs like pesticides and herbicides.

Stage 3 of the system consists of the FILMTEC TFC RO membrane which is a super-effective membrane that deals with the tiniest and most difficult contaminants to remove. It clears out everything larger than 0.0001 micron which basically eliminates up to 99% of all the TDS and contaminants in the water from heavy metals to microorganisms and more.

Stage 4 which is the last part of the filtration process is fitted with an equally large capacity coconut shell carbon filter that serves as the post-filter and it performs the final polishing of the water by getting rid of any residual chlorine, taste, odor, particulates.

Filtration Capacity and Efficiency

With regards to water production, the RO-CTOP-C can output a maximum of 90 gallons of water in a day. The rate at which it will deliver water may be slow if your pressure is low but that’s much more capacity for daily use.

Not only is this capable of producing high amounts of water but it’s also surprisingly efficient than most of the other large under-sink systems from APEC.

It only wastes 2 gallons of water for each gallon of clean water it produces. This is lower than the 3:1 average ration on many APEC’s residential systems which is a big plus.


  • Filters out most of the TDS and contaminants in water
  • High water filtration capacity of 90 GPD
  • Relatively efficient with 2:1 wastewater to pure water ratio
  • Easy to install and requires not much maintenance
  • The lightweight, compact design makes it highly portable
  • Comes in two versions you can choose from


  • Fits no other types of faucets other than standard faucets
  • No water tank. It may take time to fill containers especially with low source pressure

Price & Rating

ProductAPEC Portable Reverse Osmosis System [RO-CTOP]
BrandAPEC Water
Rating4.6 out of 5 stars (More than 215 reviews)
Recommended price215 USD (Check the latest price at

Read moreAPEC Portable Reverse Osmosis System [RO-CTOP]

APEC Water Essence ROES PH75 Reverse Osmosis System

The second spot in our top APEC essence series RO systems is the ROES-PH75 model. This unit is quite identical to the ROES-50 above, but APEC has made two major updates.

The APEC ROES-PH75 comes with an increased water production capacity and an additional remineralization stage which are big improvements that greatly boost its overall performance.


  • Produce 75 Gallons Per Day
  • More balanced alkaline water
  • Remove 99.99% of chlorine and chloramines

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Filtration Process

With the addition of a remineralization filter, the ROES-PH75 offers 6 stages of filtration which includes the same standard 5 stages of the APEC ROES-50.

At the 1st stage is a polypropylene sediment pre-filter which traps all particles larger than 5 microns including silt, dust, rust, and sand particles that might accumulate and clog the other pre-filters and RO membrane.

The 2nd and 3rd stages make use of the super-efficient activated carbon block filters made from coconut shell. These filters together absorb and remove 99.99% of chlorine and chloramines in the water.

They as well remove bad tastes, odors, organic contaminants, VOCs and other common chemicals like pesticides and herbicides thereby improving the smell and taste of the water.

At the heart of the ROES-PH75 system is the 0.0001-micron TFC RO membrane which filters out 99.9% of all the possible contaminants remaining in the water from total dissolved solids (TDS) to microorganisms and other impurities like lead, arsenic, fluoride, radium, and chromium leaving only pure water to pass through.

The 5th stage applies an activated carbon filter also made from coconut shell which gives the filtered water a finishing touch by removing any residual tastes and odors picked up from the RO tank.

6th Stage – Alkaline Filter

The filtered water from the 5th stage is finally passed through the last stage which comprises a calcium mineral cartridge that adds high-purity calcium carbonate into the RO water. 

The calcium carbonate effectively neutralizes the acidity of the filtered water and increases the pH level by about 1 to 1.5 resulting in a more balanced alkaline water.

The pH level of the final water will, however, vary based on the initial pH levels of the feed water and its composition. Nonetheless, with the alkaline filter in place, you are guaranteed to get purified alkaline water that tastes much better than plain RO water.

Filtration Capacity and Efficiency

Besides the addition of the alkaline filter, the RO membrane of the ROES-PH75 is an upgrade from that of the ROES-50 as it offers a higher water output.

It can deliver up to 75 gallons per day at 60 psi pressure which is enough to meet the needs of small to large families that desire a high water production rate.

The storage tank can hold 3.2 gallons of water which is a good capacity that will help keep your water supply constant for most parts.

Like the ROES-50, the APEC ROES-PH75 expels 3 gallons of wastewater for each gallon of clean water produced which is not the best ratio out there but it does ensure a high rejection rate and performance compared to systems with 1:1 or 1:2 ratio.


  • Removes all possible contaminants in the water
  • Alkaline filter helps raise the pH level and improves the taste
  • High water production rate at 75 gallons of pure water per day
  • Designed for easy DIY installation and low maintenance
  • Comes with 1-year limited warranty and filters are long-lasting


  • Wastewater to pure water ratio of 3:1 which is just above average
  • Slightly slow filling as it takes about an hour to fill the tank once empty

Price & Rating

ProductAPEC Water Essence ROES PH75 Reverse Osmosis System
BrandAPEC Water
Rating4.7 out of 5 stars (More than 885 reviews)
Recommended price230 USD (Check the latest price at

Read moreAPEC Water Essence ROES PH75 Reverse Osmosis System

Express Water RO5DX 5-Stage Reverse Osmosis System

The Express RO5DX presents a simple way to filter your tap water at home. It’s a straightforward RO system with a decent filtration performance at an affordable price which makes it an ideal option for those working with a very small budget.

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Like most other systems, the RO5DX utilizes a 5-stage filtration process to deliver safe and clean drinking water. The filters from stage one to four remove all possible contaminants in the water source.

The 5th stage consists of a post-activated carbon filter that takes care of odors and residual taste. However, there’s no remineralization filter, so you will have to buy it separately.

The unit can produce around 50 gallons of pure water a day which is standard for most RO units. Combined with the 4-gallon storage tank, you will have sufficient clean drinking water every time.

The best part is that this Express model features an emergency leak stop detector. When the tank is filled, it automatically shuts off the system to stop the water flow into the unit. Hence, there no danger of water overflowing from the storage tank.

For every gallon of pure water produced, three gallons are wasted, so it’s fairly efficient and will save you some money in the long run.

The unit comes with complete push-in quick-connect fittings that are color-coded to let you know what hose goes where. Plus, the instruction booklet is detailed with diagrams and colored illustrations to aid you.

Therefore, it’s quite easy to install and to replace the filters too if you have basic plumbing skills. However, the filters are not long-lasting like in the other units above. The pre-filters need replacement twice a year while the RO membrane and the post-carbon filter need to be replaced once a year.

In general, aside from replacing the filters frequently and the fact that it does not feature a remineralization filter, everything else is perfect and well built.

If you have a tight budget but still want a unit that’s capable of delivering clean drinking water without any issues, then the Express RO5DX might be a good option for you.


  • The impressive 5-stage filtration process
  • Comes with extra filters for easy replacement
  • Automatically shuts off water flow when the storage tank is filled
  • Delivers 0.8 gallons of purified water every minute
  • Easy to set up and use
  • Highly competitive price


  • Does not include a remineralization filter
  • Filters are replaced frequently compared to other models

Price & Rating

ProductExpress Water RO5DX 5-Stage Reverse Osmosis System
BrandExpress Water
Rating4.6 out of 5 stars (More than 829 reviews)
Recommended price135.61 USD (Check the latest price at

Read moreExpress Water RO5DX 5-Stage Reverse Osmosis System

Home Master TMAFC-ERP-L Reverse Osmosis System

Designed with the inspiration from the TMAFC-ERP model, the Home Master TMAFC-ERP-L is an efficient and high performing RO system that guarantees to improve the quality and taste of your drinking water.

One of its biggest strengths is the high production rate which sets it apart from the other models in Home Master’s full contact systems.

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Filtration Process

The TMAFC-ERP-L is loaded with 7 stages of water filtration which is very identical to those of the Home Master TMAFC and TMAFC-ERP models.

The first two stages consist of pre-filters, a sediment filter, and a powerful catalytic carbon filter. These two clear out a good number of contaminants from sediments and particles like silt, sand, dust, and rust to chlorine, VOCs, chloramines, and other common chemicals.

The Home Master Dow Filmtec RO membrane in the 3rd stage removes up to 99% of the remaining contaminants which includes heavy metals like lead and arsenic, microorganisms such as viruses and bacteria, chloramine, and total dissolved solids as well.

On its way to the RO storage tank, the filtered water goes through the first phase of the Home Master’s full contact technology. The artesian filter at this stage filters the water again and then re-mineralizes it.

It contains coconut shell activated carbon media that clears out any chlorine, chemicals, or other contaminants that slip through the previous stages.

It also has crushed marble which re-mineralizes the water by adding health compounds such as magnesium and calcium into the water to reduce its acidity and help prevent RO tank degradation.

When the water travels from the RO tank, it passes through the second phase of the full contact technology which contains the same artesian filter with crushed marbles and coconut shell carbon media.

The filter removes any possible odor and taste picked up from the holding tank and again adds magnesium and calcium minerals into the water.

These two vital minerals help further raise the pH of the water to more balanced levels of between 7.0 and 8.0. The water that you end up drinking is cleaner, fresh and tastes much natural.

Permeate Pump

Included with the TMAFC-ERP-L is a permeate pump which likes in its predecessor is a key component that works to improve the system’s production rate and efficiency.

It will increase the pressure of the water going into the system as well as the speed of the flow of water at the faucet. This will in turn help boost the production rate by almost 50% and also help bring down wastewater generated by up to 80%.

Same as both the TMAFC and the TMAFC-ERP, the unit utilizes larger fittings and tubing, so the flow rate in the system and at the faucet is much faster, about twice as fast compared to many traditional RO systems.

Filtration Capacity and Water Efficiency

The biggest strength of this TMAFC-ERP-L model is none other than the large capacity membrane it comes with. It can produce a maximum of 75 gallons of pure water each day at 77°F temperature and 70 psi pressure.

That’s a sufficient rate to ensure a constant supply of purified water to meet the demands of a big family and even small offices with 4 to 8 people.

The best part is that when the permeate pump is running, the production rate can increase by up to 50%. It’s cable of outputting around 100 gallons of clean drinking water in a day which is incredible.

The other area where this unit shines is in combating wastewater. The permeate pump plays a role here again as it reduces the wastewater the system produces by 80% bringing the wastewater to pure water ratio to 1:1 which is extremely low and the best you can find in the market.

Installation and Maintenance

Installation is pretty straightforward. The package features everything you need to set the system up and the instruction manual provides a clear guideline of the process.

Maintenance won’t either be a problem. The filters have a long life requiring changing just one every year while the membrane can last up to 5 years.

The only downside although not a deal-breaker might be its large size. Otherwise, the whole system is made to high-quality standards and the pump is relatively quiet when running.

All in all, the TMAFC-ERP-L model is one of the best-rounded under-sink RO systems from Home Master and it’s able to deliver great performance. This is totally worth it if you want a high production rate and fresh-tasting drinking water.


  • Effectively removes more than 1000 different contaminants
  • Raises the pH of the water to a neutral level and make it tasty
  • The permeate pump increases production rate and flow rate
  • Can produce up to 100 gallons of purified water in a single day
  • Extremely low wastewater to pure water ration of 1:1
  • Simple to set up and to maintain due to modular filter design
  • The permeate pump doesn’t require electricity to operate
  • Comes with a 5-year limited warranty


  • A little bit large to fit small kitchen cabinets
  • The upfront cost may be slightly on the higher end

Read moreHome Master TMAFC-ERP-L Reverse Osmosis System

Home Master TMAFC-ERP Artesian Full Contact RO System

The TMAFC-ERP is another top-quality model in Home Master’s full contact series. It’s an improved version of the TMAFC model above offering some new wonderful upgrades and features. The biggest improvement is the addition of a permeate pump which significantly boosts the unit’s efficiency and puts it ahead of other similar mid-range systems.

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Filtration Process

The TMAFC-ERP has got the same 7 stages of filtration as the Home Master TMAFC which includes two high-quality pre-filters, a reverse osmosis membrane, and an additional two remineralization stages.

The 1st stage is fitted with a sediment filter that removes dust, sand, silt, scales, rust and any other particle that’s larger than 5 microns.

The sediment filter is followed by a powerful granular activated catalytic carbon filter in the 2nd stage which takes care of all kinds of chemical contaminants in the water. It clears out chlorine, VOCs, pharmaceuticals as well as chloramines.

In the 3rd stage, we have Home Master’s high-performance Dow Filmtec RO membrane which removes 99% of the remaining contaminants from chemicals to heavy metals to dissolved solids to pharmaceuticals, and many other contaminants like microorganisms.

After the water has been filtered through the RO membrane, it goes through a 4th stage that’s made up of two phases featuring a carbon filter and a remineralization filter.

The carbon filter clears out any residual chlorine and other chemicals while the remineralization filter adds back calcium and magnesium ions into the water to balance its pH level.

This is the first point of the Home Master’s full contact remineralization system and happens before the water is delivered to the RO storage tank.

The second point of remineralization occurs in the 5th stage which is also made up of two phases consisting of a carbon post-filter that helps clear out any odor and tastes picked up from the RO storage tank and a remineralization media that adds small amounts of magnesium and calcium minerals into the water thereby raising the pH level once again.

Like in the Home Master TMAFC model, the first point of remineralization ensures that the water going into the storage tank has a balanced pH to minimize the degradation of the rubber bladder or rather the storage tank itself.

Therefore, the result after the entire process is completed is cleaner mineral water with a much better and fresher taste. The pH value of the final water is around 7.5 to 8.0.

Permeate Pump

Now the major step up to this TMAFC-ERP model from its predecessor, the TMAFC model is the fact that it comes standard with a non-electric permeate pump.

This is a key component that significantly boosts the efficiency of the entire system. It increases the water production rate by almost 50% while at the same time reducing the amount of wastewater generated by up to 80%.

Both of these are really important especially if you are on city water and the incoming pressure is a bit lower than the standard 60 psi. The pump can raise the water pressure from as low as 40 psi but anything below that you will have to get an electric booster pump.

Nonetheless, the bottom line is that with this permeate pump in place, this TMAFC-ERP system will be able to fill the RO tank much faster.

In addition, combined with the larger fittings and tubing that the unit uses, it will absolutely provide a much faster flow rate or water output at the faucet.

You can expect water flows to be about 50% more than that of other ordinary RO systems. Plus the water is also likely to come out slightly cleaner as the pump help eliminate a common condition known as “TDS” creep.

Filtration Capacity and Water Efficiency

The membrane of the TMAFC-ERP is rated to produce around 50 gallons of clean water per day which is the same capacity as the Home Master TMAFC model.

However, with the pump running, its typical output can get closer to 75 GPD. Thereby, if you have a medium-sized family and need a relatively high production rate, this unit will serve you well.

In terms of efficiency, the TMAFC-ERP is no doubt one of the most efficient RO systems out there. This is due to the included permeate pump which helps to both increase efficiency of the system and drastically reduces wastewater production.

Approximately one gallon of water is wasted for every gallon of purified water created. Compared to the average 2:1 and 3:1 ratio of most under sink RO systems in the market, this TMAFC-ERP will definitely keep your water costs low.

The ratio may vary a little depending on your incoming water pressure, but overall if you after an RO system that can help preserve water, then TMAFC-ERP is one reliable option.

Installation and Maintenance

Anyone with basic DIY skills can easily install this unit within an hour or two. The full installation instruction manual is provided and clearly outlines all the steps to install this unit. Home Master has as well made aa several videos that cover the whole installation process

The filters and the membrane are long-lasting too and feature the Home Master’s modular design, so maintenance and filter changes will be quick and easy. The four filter cartridges need replacing once every 12 months and the membrane once every 3 to 5 years.

There’s no noise produced either by the pump during operation. It’s extremely quiet with the only noise you are likely to hear is a slight whoosh sound. Furthermore, the pump does not require electricity to do its job.

When you consider all the wonderful and thoughtful additions coupled up with the advanced water filtration technology, it’s only fair to conclude that the Home Master TMAFC-ERP model offers nothing but value for money. If wastewater and pressure is a concern, then this a unit you should consider.


  • Clears all the common and stubborn contaminants
  • Produces a fresher, natural tasting water with balanced pH value
  • Permeate pump increases system efficiency and output rate at the faucet
  • Offers the best wastewater to pure water ratio of 1:1
  • Can deliver more than 50 gallons of clean water a day
  • Designed for easy DIY installation within one or two hours
  • Durable filters with modular design for easy maintenance
  • Backed by a 5-year limited warranty


  • The unit may take a bit more space in your under-sink cabinet

Read moreHome Master TMAFC-ERP Artesian Full Contact RO System

APEC Water RO-Hi Reverse Osmosis System [90 GPD]

The RO-Hi is yet another fine model in APEC’s ultimate line of reverse osmosis filtration systems.

This premium WQA gold seal certified system is a perfect fit for those searching for a fast-flow system with a high output. It’s purposely tailored for high usage or fast-flow output.


  • Reasonable price
  • Remove up to 99% of contaminants
  • Produce 90 gallons per day

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Filtration Process

The RO-Hi is equipped with premium-quality filters that deliver high performance for an extra-long time compared to those in other standard systems. The unit uses a 5-stage filtration process to get rid of all kinds of impurities and contaminants in the source water.

In the 1st stage, there’s a polypropylene sediment filter which takes out all the particles and large particles in the water down to 5 microns. This step clears out all the dust, rust, silt, sand, scales and any other solid contaminant. 

The 2nd and 3rd stages consist of effective coconut shell carbon block filters with a large surface area. They absorb up to 99% of chlorine and chloramines that often lead to unpleasant tastes, odor, colors and cloudiness. These filters also efficiently remove most of the common chemicals and VOCs from the water.

At the 4th stage, a FILMTEC high rejection TFC reverse osmosis membrane gets rid of even the tiniest remaining contaminant in the water including 99% of all the TDS (total dissolved solids).

It clears out everything larger than 0.0001 microns which pretty much doesn’t much around other than pure water molecules.

The final stage of the unit is an advanced coconut shell carbon filter which ensures the water you draw from your faucet does not have any unpleasant taste from the holding tank.

Filtration Capacity and Efficiency

With an output of 90 gallons of purified water per day, the RO-Hi is another model within APEC’s ultimate series that will comfortably suit any large family out there that requires a high amount of water regularly.

Besides that, what makes this model one of the best on the market in terms of performance is that it has a fast-flow output design.

It features 3/8” output quick dispense design which increases the water flow rate allowing it to fit the tank twice faster than standard reverse osmosis systems.

This will reduce waiting time, especially when filling large pots or pitchers. You will be able to use it often without lacking clean drinking water.

With regards to the amount of wastewater generated, the RO-Hi is still not that efficient and this is something we’ve noted in most of APEC’s RO systems. It wastes 3 gallons of water for every gallon of purified water produced.

Installation and Maintenance

There’s nothing complicated when it comes to setting up the RO-Hi. Everything you need is included in the package plus the installation tools and manual.

It will as well require very little maintenance because it has longer-lasting filters. The three first filters can last up to 12 months while the post-filter and the membrane have a service life of 3 to 5 years.

Overall, we would say this system is best suited for larger households that have five or more members. It’s built specifically for high usage and will ensure you get a constant supply of water to meet your needs.


  • Reduces contaminants to close to zero
  • High capacity filters with a high flow rate
  • High pure water production ideal for large families
  • Easy to install and filters have a longer service life
  • Backed by a 2-year limited warranty


  • Wastewater generated is a little on the high end

Read moreAPEC Water RO-Hi Reverse Osmosis System [90 GPD]

APEC RO-Lite RO System Reviews

Offering double capacity filters and high production capacity, the APEC RO-Lite model is a unit solely built for light commercial use or large-scale residential use.

It has the features and capability to effectively purify highly contaminated water than any standard under-sink RO unit.

Why APEC RO-Lite:

  • 3 Capacity options
  • 2 RO Membranes
  • Eliminate 99.9% of the TDS, chemicals

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The model comes in three versions which are the RO-Lite-180, RO-Lite-240 and RO-Lite-360. The three options have the same number and type of pre-filters and post-filters. What sets them apart is the water production rate and the number of membranes they have.

The RO-Lite-180 has two membranes, the RO-Lite-240 three membranes while the RO-Lite-360 has four. Below is our review of the RO-Lite-180 which will give you a better perspective of how the other two models perform.

Filtration Process

Same as the other two versions, the RO-Lite uses a 5-stage RO filtration with three filters in the pre-stage, two membranes in the 4th stage and one filter in the post-stage. 

For the 1st stage, the unit is equipped with a high-grade 20” polypropylene sediment filter. It will trap dirt, sand, silt, sand and any particle that’s greater than 5 microns to protect the rest of the filters and membranes from getting clogged.

Next, the water passes through a 20” 5-micron premium extruded carbon block which clears out chlorine, chloramine, odor, tastes, cloudiness, some large organic contaminants, and VOCs. The filter also helps remove the remaining sediments and several other common chemicals.

The 3rd stage features another 20” 5-micron premium extruded carbon filter which further removes any residual chlorine, chemicals as well as VOCs that slipped through the 2nd stage.

In the 4th stage of the system, the water passes through two APEC 0.0001-micron FILMTEC TFC membranes. The fact that each of these membranes is really of high-quality guarantees optimal filtration when it comes to contaminant removal.

Together, they double the rejection rate of the system enabling it to consistently eliminate 99.9% of the TDS, chemicals, microorganisms and thousands of other contaminants present in your water.

Lastly, using an advanced 12” coconut shell carbon filter in the 5th stage, the system performs final refining of the RO water by getting rid of the residual tastes, odors and impurities collected from the RO tank to supply almost zero-contaminant water.

It’s worth noting that the first four stages of the unit consist of 20″ industrial standard sized filters and membranes that offer double capacity and surface area compared to those in regular RO systems. They provide maximum contact time with the water making them super effective at removing contaminants at each respective stage.

Filtration Capacity and Efficiency

The two high capacity RO membranes of the RO-Lite-180 can output 180 gallons of clean water per day at a normal municipal water pressure of 60 psi. It can go up to 250 GPD with a source pressure of 80 psi.

The large capacity coupled with a high-performance filtration process is what allows this unit to withstand constant heavy usage.

It’s an ideal choice for light commercial applications like in small restaurants, labs or offices. You can even use it in a residential setting where the demand for drinking water is very high.

The other factor that makes this RO-Lite model a great commercial grade system is the equally large capacity holding tank.

It comes with a 14-gallon pressurized tank featuring a heavy-duty stainless steel construction. This large storage tank will ensure you have a stable and continuous supply of purified water on demand.

Furthermore, the unit uses big 3/8” input and output tubing which help boost the flow rate of water into the system and from the RO tank to the faucet hence cutting down the waiting time when drawing water or filling large pots of water.

Installation and Maintenance

Although it’s a commercial system, installing the RO-Lite is no different from the other standard under sink RO systems on our list.

It requires some basic RO skills but if you are handy, you will have no problem setting it up. The installation manual and everything you need is included.

Maintenance has been made easy too with the filters and the membranes lasting twice than those of many regular RO systems in the market.

In general, you can certainly rely on this APEC RO-Lite model for light commercial use. The quality, high-capacity filters, double RO membrane and large output at a fast flow rate guarantees optimum performance even under heavy usage.

In case you need even more filtration capacity, then you can go for the RO-Lite-240 or RO-Lite-360.


  • Performs thorough filtration to remove a wide range of contaminants
  • High output and flow rate ideal for light commercial use
  • Large capacity 14-gallon holding tank
  • Three versions to choose from based on your water demands
  • Easy to set up and doesn’t need a lot of maintenance


  • No remineralization filter
  • Requires a bit more space to install

Read moreAPEC RO-Lite RO System Reviews

iSpring RCC7 Reverse Osmosis System Review

Our first top pick is the iSpring RCC7 RO system. This is one of the best-selling RO products from iSpring.

iSpring RCC7 reverse osmosis system is unequaled in performance, quality, and durability. This RO system has a 5-stage filtration that removes over 1000+ different kinds of contaminants and it features 75 GPD.

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It’s simple and affordable but a very reliable and efficient system that’s more than capable of removing all kinds of contaminants in the water.

Filtration Process and Stages

The RCC7 features an effective 5-stage RO filtration process which does so well to produce very clean and pure final water that’s safer and healthier to drink.

The first batch of filters in the system are three carbon-based pre-filters that make up the first three stages.

The first stage is the sediment filter which is a high capacity polypropylene filter that removes all sediments and silt in the water down to 5 microns.

The second stage is made up of a 5-micron granular activated carbon (GAC) filter which is quite effective at trapping large contaminants and chemicals like chlorine and chloramines as well as removing microorganisms present in water.

All the particles, microorganisms and chlorine that leaked through the second stage GAC filter are trapped by the CTO carbon filter in the third stage.

These three pre-filters are amongst the best you will find in the market. They perform so well with regards to eliminating most of the contaminants, chemicals, and microorganisms present in the water which allows the RO membrane to function at its maximum efficiency.

The membrane itself it’s a thin film composite filter that makes up the fourth stage of this iSpring’s RCC7 filtration system.

It’s very capable of removing contaminants down to 0.0001 microns which is so small to allow only water molecules to squeeze through while stopping up to 99.99% of up to 1,000 different contaminants.

Virtually nothing else will be able to pass through. It will completely remove all the harmful contaminants that often appear in well and municipal water including chlorine, dissolved solids, arsenic, bacteria, and viruses.

The final stage consists of a fine GAC post-filter which does the final polishing of the water by removing any other TDS or contaminants in the water from the RO tank before it’s delivered to the faucet.

The five stages of the systems progressively remove contaminants, cleaning and purifying the water to improve its quality and taste. 

Filtration Capacity

The membrane of the RCC7 also has a high throughput which big thumps up. It’s capable of delivering up to 75 gallons of purified water every day which is sufficient capacity for nearly any family size even large families.

For every gallon of purified water produced, the system wastes around 3 gallons although it may vary depending on the quality and pressure and of your feed water. However, this average ratio you will find in most standard RO systems.

Installation and Maintenance

The system comes with quick-fitting connectors and everything that you need including all the parts from the storage tank to the faucet as well as all the mounting hardware and clear, well-organised instructions.

So, installation is pretty much straightforward if you are a very handy person or have some basic DIY skills. The system requires very little maintenance too as there are no moving parts.

The pre-filters have a service life of 6 months before requiring replacement while the post-carbon filter needs to be replaced every year. The membrane, on the other hand, will go for up to 2 to 3 years before requiring replacement.

Furthermore, the first stage filter (sediment filter) has a clear-see through housing which facilitates an easy way to inspect the condition of the filter and know when it’s time to change it before a problem occurs.

The only setback we noted about this system is that the O-rings are somewhat thin and look a bit flimsy. Even so, it’s not really a deal-breaker as it can last long enough before you can change it for much better quality.

All the other components and parts are of great quality. The tank is made of steel and the construction of the main RO unit is sturdy which makes it very durable. You will also not hear any sound as the system is in operation. It’s super quiet.


  • An effective 5-stage filtration process
  • Removes up to 99.99% of all contaminants
  • Can deliver 75 gallons of pure water per day
  • Has quick-connect fittings for easy DIY installation
  • See-through first stage filter housing for easy inspection
  • The filters and membrane have a decent service life
  • Comes with a 1-year warranty and lifetime support


  • O-ring is quite thin and somewhat flimsy
  • The wastewater ratio is relatively high

Read moreiSpring RCC7 Reverse Osmosis System Review

iSpring RCC7P 5-Stage Reverse Osmosis System Review

iSpring RCC7P reverse osmosis system is an extended version of the RCC7 with an electric booster pump that ensures reliable, consistent performance regardless of pressure variations. This RO system is ideal for low-pressure water, the booster pump allows the system to achieve tank fill up to 50% faster and 50% less water waste.

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If you live in an area where your typical residential water pressure is low, say around 40psi or lower, then this iSpring RCC7P might just be the ideal choice for you.

It’s a high-performance system designed with an inbuilt pump that boosts the feed water pressure high enough to allow the system to perform much effectively.

Filtration Process

Like the RCC7 model, the iSpring RCC7P utilizes a 5-stage RO filtration process which ensures reliable and efficient water purification results.

The three first stages consist of three 5-micron pre-filters that include a polypropylene sediment filter followed by a carbon KDF (GAC) filter and then a carbon block (CTO) filter.

The first two filters trap all sediments, large contaminants, and microorganisms that are bigger than 5 microns including chlorine, chloramines and other chemicals.

Smaller contaminants, chlorine, and microorganisms that pass through the second stage are further removed by the carbon block filter in the third stage.

The fourth stage is a high rejection RO membrane which gets rids of all remaining contaminants that are as small as 0.0001 microns.

It has a rejection rate of 99.99% hence can eliminate more than a thousand harmful pollutants including arsenic, viruses, bacteria, chemicals, lead, pesticides, chlorine, and fluoride.

The final stage is the fine GAC filter that provides the final polishing. It removes any possible residual contaminant and odor that may have accumulated in the RO tank delivering clean and safe purified water to the faucet.

Inbuilt Booster Pump

Now the most commendable thing about this iSpring RCC7P model and what makes it really perform so well is the fact that it’s equipped with an inbuilt booster pump.

The RO filtration process requires high feed pressure so as to force all the impurities out of your water and when it’s low, the system will not be efficient. This is where this booster pump comes into play.

It’s designed to raise the inlet/feed water pressure going into the system from as low as 30 psi to about 70 to 80 psi which is an ideal level that optimizes the performance of the system from the first stage to the final one thereby facilitating more efficient filtering.

Furthermore, the pump features multiple sensors which help keep track of the pressure and turn on the pump as soon as the source water pressure falls below around 40 psi.

The sensors also automatically turn off the pump when the ideal pressure is obtained hence preventing any chances of overheating or other potential damages. Therefore, you are assured of consistent performance regardless of pressure variations.

Filtration Capacity

The RCC7P like its counterpart above utilizes a high capacity RO membrane that’s capable of producing 75 gallons of water per day which is large enough to handle the needs of most medium to large families.

Moreover, the booster pump helps increase the water production speed of the system allowing it to achieve almost 50% faster tank fill rate compared to its competitors.

Boosting the water pressure also has the effect of minimizing wastewater production as the pump forces more water through the filters there reducing the wastewater production to up to 50% which is quite commendable.

Installation and Maintenance

In terms of installation, the unit is designed for DIY installation with color-coded tubings and a push to connect fittings. It’s a pretty simple process that may not require the assistance of a professional if you some little technical skills.

The user manual is clear and well-written, and all the necessary parts and tools required for installation are included plus a video should you need visual instructions.

You will need to change the pre-filters after every 6 months while the post-carbon filter can last up to a year before needing to be replaced and the RO membrane can go for at least 2 years.

Both the pump and the system are quiet during operation hence you can expect no disturbance at all. They produce very little noise which you can hardly hear over normal kitchen activity.

In general, there’s no notable setback in this iSpring RO system that can cause any alarm. It’s a reliable unit that will deliver great performance especially in situations where the feed water pressure is below 40 psi. All the parts are of good quality and certified by FDA and WQA.


  • Optimum RO filtration performance through 5 stages
  • Booster pump effectively raises water pressure to ideal levels
  • Has a high pure water production rate with fairly less wastewater
  • Easy to install with all the necessary tools included
  • Both the pump and RO unit operate quietly
  • Ideal for use in areas with a feed water pressure of less 40psi
  • Backed by a 1-year warranty with lifetime support


  • The supply water valve and O-rings are not of the best quality
  • Requires a power source which may limit your installation options

Read moreiSpring RCC7P 5-Stage Reverse Osmosis System Review

iSpring RCS5T Reverse Osmosis System Review [500 GPD]

iSpring RCS5T reverse osmosis system is a high capacity tankless commercial grade reverse osmosis system. The RO system’s patented dual-flow membrane produces a rate of 500 gallons per day of RO filtered water with 1:1 waste to a pure water ratio.

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iSpring RCS5T is designed purposely for those looking for a system that can supply purified drinking water on demand.

It’s a high-capacity tankless RO water filter system with an on-demand output ability which makes it a great choice for large families, small restaurants, coffee shops, and offices. 

Filtration Process

The RCS5T offers 5 stages of filtration with the first stage being a polypropylene sediment filter which removes debris down to 5 microns. It has a see-through housing that allows you to easily see if it’s blocked and requires replacement.

The next cartridge is a granular activated carbon (GAC) filter which traps chlorine particles, chloramines, and other pollutants like phenol and mineral oils.

The third stage consists of a carbon block filter which further removes all residual chlorine, tastes, odors as well as chloramines and microorganisms.

The fourth stage is one high-quality dual-flow RO membrane that removes contaminants down to 0.0001 microns which virtually eliminates 99% of all contaminants and pollutants common in the city or well water.

The last stage in the system is the post-carbon filter which takes care of any residual chlorine, chemicals or taste impurities and odors from the RO tank.

Tankless Operation

While it has a very effective RO filtration process, what makes this iSpring RCS5T RO system stand out is that it’s equipped with dual-flow membrane and booster pump, a combination which allows it to produce purified water on demand without requiring a storage tank.

This ability to work without the need for a tank makes the RCS5T an ideal choice for small commercial purposes as well as for households as it’s a great space-saving option.

In addition, the pre-installed booster pump does well to raise the water pressure going into the RO system which helps boost its performance and production rate.

The system can work with feed water pressure that’s as low as 25 psi and a maximum psi of 95 to 100, so it will work efficiently and effectively despite the pressure of the source water.

If your feed water pressure is quite low, you will find this booster pump to be a very useful addition plus there’s a nice built-in pressure gauge to allow you easily monitor the pressure.

Filtration Capacity

With a capacity to produce 500 gallons of filtered water per day (500 GPD) under ideal conditions, this iSpring RCS5T model is more than capable of meeting the daily demands of most large households and small offices with around 10 to 20 people.

The capacity is large enough to allow you even use the system for small commercial purposes like in a small restaurant, coffee shop or store and you will hardly notice any minor variations in the water production.

The best part is that you can pair the system with a pressurized storage tank if you desire to have reserve capacity for a steady and continuous supply.

A storage tank will be essential in case of very high usage situations, especially for commercial applications. You will need a delivery pump too as the output pressure of the clean water is about 10 to 15 psi on average.

Besides the high capacity, another major highlight of this iSpring RO system is the fact that it offers one of the most balanced pure water to wastewater ratio.

The dual-flow membrane ensures consistent output flow with a 1:1 pure to wastewater ratio which is pretty exceptional for such a high capacity system.

It will produce much less wastewater compared to other similar systems on the market that often have a pure to wastewater ratio of 1:3.

Installation and Maintenance

Installing the RCS5T is a breeze. Like the other iSpring’s systems above, this one is also designed for DIY installation and it comes complete with everything you need to set it up including a free-standing metal frame.

The installation manual is easy to understand and categorically explains every step accompanied by pictures in addition to the direct instructions.

Maintaining the unit is also simple. In fact, the system is designed to flush automatically to ensure the membrane is clean and works efficiently. No need to manually flush it.

All it’s required of you is changing the filter cartridges which is every 6 to 12 months for the carbon filters depending on usage and 2 to 3 years for the membrane. Furthermore, the booster pump produces very minimal noise thereby it won’t cause any disturbances.

The only setback is that it requires a power source for the booster pump which somewhat limits your installation options. Moreover, due to the large capacity, the power levels might be somewhat high, but that’s a tradeoff considering that it delivers a lot of purified water.

Generally, if you own a small restaurant, business or need a reliable tankless RO system for large residential use, then this iSpring RCS5T is a perfect choice. It will certainly not disappoint.


  • Removes up to 99% of contaminants in water
  • High capacity membrane delivers up to 500 GPD
  • Very efficient with 1:1 pure to wastewater ratio
  • Has a booster pump to ensure an optimum feed water pressure
  • Comes with an integrated pressure gauge
  • Installation is very simple and the pump operates quietly
  • Has a 1-year warranty


  • The booster pump may limit your installation options
  • Can lead to high power costs

Read moreiSpring RCS5T Reverse Osmosis System Review [500 GPD]

iSpring RCC7P-AK RO Filtration System Review

The iSpring RCC7P-AK is exactly identical to the RCC7AK model except that it comes equipped with a booster pump making it an ideal choice for those households where the feed water pressure is below 40 psi.

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Filtration Process

Like the RCC7AK, this unit is a 6-stage reverse osmosis system with the first three stages offering a combination of three prefilters with polypropylene sediment filter in the 1st stage, GAC (KDF) filter in the 2nd stage and a carbon block filter in the 3rd stage.

Together they remove all large contaminants down to 5 microns as well as chemicals such as chlorine and chloramines. They also remove any unpleasant odor and tastes in the water.

The fourth stage RO membrane eliminates up to 99.99% of all the remaining contaminants in the water down to 0.0001 microns which include fluorides, arsenic, lead, bacteria, viruses, VOCs and much more.

In the fifth stage is a fine GAC filter that removes residual contaminants from the RO tank. The final stage is an alkaline remineralization filter comprising of minerals stones and calcite media.

The filter restores the healthy minerals (calcium, magnesium, potassium and sodium) into the water while raising its pH to give purified water with a more pleasant natural taste.

Booster Pump

If your source water pressure is low (below 45psi), then the iSpring RCC7P-AK model will solve this problem as it features a built-in booster pump that can raise the pressure up to 80 psi.

By boosting the pressure, the pump ensures the system works effectively regardless of any pressure variations and as well improves its production speed.

Filtration Capacity

The iSpring RCC7P-AK RO membrane can produce 75 gallons of water every day which is enough to meet the daily water demands of small to medium families. 

The tank can hold up to 3.2 gallons which pretty much a standard capacity for almost all the tanks that are included in iSpring’s RO systems.

For each gallon of purified water it produces, the unit wastes around 2 gallons, so it’s equally fairly efficient like its counterpart the iSpring RCC7AK above.

Installation and Maintenance

When it comes to installing this RCC7P-AK model, it’s quite a straightforward DIY process provided you have some technical skills.

All the necessary parts and tools for installation are included plus a clear manual and you can even get instructional videos in YouTube to guide you through the whole process. The unit is 19 inches tall, so it will fit under any kitchen sink with a 21” space in height.

Maintenance is as well a breeze. The pre-filters and the AK filter require replacing every 3 to 6 months. The RO membrane will last 2 to 3 years while the fifth stage filter can go for a year before requiring replacement.

The pump and the system operate nearly noiselessly such that you can barely hear any sound over normal kitchen activity. It won’t cause any disturbance at all plus the pump automatically turns once the tank is full.

If there’s any set back to point out it would probably be the fact that the service life of the prefilters is a bit short especially in case of very hard water. Other than that, this is a great reverse osmosis system to consider for those with low source water pressure.


  • Removes 99.99% of all contaminants in water
  • Restores the natural minerals and alkalinity of water
  • Booster pump increases pressure to optimal levels
  • Delivers 75 gallons of water a day
  • Installation is fairly easy and the system operates quietly
  • Comes with one year warranty and a one-year money-back guarantee


  • The prefilters are not that durable

Read moreiSpring RCC7P-AK RO Filtration System Review

iSpring RCC1UP-AK RO System Reviews

iSpring RCC1UP-AK is quite identical to the RCC7AK-UV model above except that it includes a booster pump which the RCC7AK-UV does not have.

In all of iSpring’s RO systems we’ve reviewed, this is the most comprehensive model. It basically has everything you would want in an RO system.

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Filtration Process

Similar to the RCC7AK-UV, the iSpring RCC1UP-AK is a 7 stage RO system and it uses the first 5 stages of the RO filtration process to very effectively eliminate all the unwanted impurities in the water including chlorine, odor, and unpleasant tastes.

Alkaline Remineralization Filter

To replenish the lost minerals removed by the RO process, the stage 6 of the RCC1UP-AK makes use of an alkaline remineralization filter which has red mineral stones that add back the healthy natural minerals to the RO water.

The stones add calcium, magnesium, potassium and sodium ions to the water which make the water mineral-rich and healthy almost like the spring waters.

Aside from the mineral stones, the filter has calcite media which adjust the pH level of the filtered water bringing it to a more neutral to alkaline level. This, in turn, enhances the taste of the RO water making it much refreshing to drink. 

UV Sterilizer

Stage 7 of the RCC1UP-AK RO system comprises of a UV sterilizer filter which utilizes the powerful iSpring’s 11W UV lamp. The lamp emits strong UV light which penetrates the water to clean off all the organic microorganisms from the water.

This stage is very essential especially if your water is from a well or any other water source that is likely contaminated with germs and microorganisms such as streams and lakes.

The UV lamp is controlled by the iSpring’s smart flow sensor switch and it works flawlessly turning on the UV light automatically when there’s water flow and switching it off when no water is flowing but with around 3 minutes delay.

As I’ve mentioned severally in the other reviews, this sensor is thoughtful addition that ensures the efficiency and durability of the UV lamp plus it helps cap the power consumption.  

Booster Pump

Now, what makes the RCC1UP-AK impressive the most compared to its predecessor, the RCC7AK-UV model is the addition of an RO booster pump.

Unlike the other previous models, the pump that comes with this RCC1UP-AK system is a new and upgraded version that’s designed to work even more efficiently. The pump is capable of increasing the feed water pressure from as low as 30 psi up to 80 psi.

It ensures that the RCC1UP-AK RO system maintains a more efficient and consistent performance throughout even with variations in source water pressure. This makes the RCC1UP-AK an ideal choice for homes that experience lower water pressure.

Filtration Capacity

The other thing that puts the RCC1UP-AK ahead of the RCC7AK-UV model is its high production capacity. It’s equipped with the same quality RO membrane found in the iSpring RCB3P and RCC1UP models which produces up to 100 gallons of pure water per day.

This high filtration capacity means that the RCC1UP-AK is more than capable of suiting the water demands of families of large families.

Even much better, the booster pump enhances the production speed of the unit which means it will fill the RO tank much faster. It also helps reduce the amount of wastewater generated by the system in comparison to pumpless models. For every gallon of pure water, the system produces only 2 gallons of wastewater which is quite a decent ratio.

Installation and Maintenance

Setting up the RCC1UP-AK may prove a little bit challenging as it a comprehensive RO system. Nonetheless, it does come with everything necessary to install it including a clear instruction manual, so if you are a handy person, it may not pose many challenges.

Maintaining it is not that hard though as it only requires regular cleaning up and changing of the filters every 6 to 12 months for the three prefilters and 1 to 3 years for UV filter and RO membrane. The post-carbon filter and the alkaline filter need changing once every year.

We couldn’t find any serious downside to this unit. However, although the flow sensor switch help minimize power consumption, the fact that both the pump and the UV lamp use electricity will likely raise your power bills but not too high.

To sum it all, the RCC1UP-AK is a perfect option for those who want a more comprehensive RO system that can very effectively deal with all kinds of contaminants and deliver the purest water. It’s especially great for households that often face low water pressure.


  • Effectively removes all contaminants in the water
  • Adds back lost healthy minerals and balances the pH
  • UV sterilizer kills any microorganism lingering in the water
  • Booster pump raises the water pressure to ideal levels
  • High filtration capacity of up to 100 gallons a day
  • Decent 1:2 pure water to wastewater ratio
  • Comes with a one-year limited warranty and 30-day money-back guarantee


  • A little bit challenging to install without basic DIY skills Requires electricity which may slightly raise the power cost

Read moreiSpring RCC1UP-AK RO System Reviews