Top 6 Best Under Sink Water Filter For 2018

Today we will bring you the most comprehensive comparison guide on the best under sink water filter for your kitchen in the market.

Water contamination has become a serious issue in the recent days. You will be seeing news on water contamination issue on every week in parts of the country.

We need to get rid of them before to prevent the pollutants from entering our body.

Some contaminants, such as mercury and lead, will stay and accumulate in our body for many years before it reacts negatively to our body.

In this guide, we will be discussing:

  • Filter Comparison.
  • Our Winners.
  • Criteria for an Excellent Water Filter.
  • Why Do We Recommend RO System?
  • Why Under Sink Water Filter?


Filter Comparison

I am pretty sure that you have heard of one or two of this brands. In this guide, we will be comparing drinking water filters from APEC, iSpring, Aquasana, Home Master and Express Water.

Not all their products are great. Those brands have been established for years in water filter market and have thousands of customers under their belt.  Some of their water filter systems are one of the best sellers in the market.

To make this easier, we have put in a table for comparison based on the features of 11 under sink water filters that are highly sought by customers.

SystemFeatureCostRatingFlow Rate
+ Guaranteed removal of major minerals such as lead, fluoride, radium
+ Made in US
$$, $40/year4.850 GPD
iSpring RCC7
iSpring RCC7 Reverse Osmosis Water Filter System
+ WQA Gold Seal Certification
+ 75 GPD production rate
+ The most cost effective product
$$, $48/year4.875 GPD
Express Water RO5DX
Express Water Reverse Osmosis System
+ The most affordable reverse osmosis system
+ Free one year replacement filter
$, $50/year4.750 GPD
Aquasana OptimH2O
Aquasana Reverse Osmosis System
+ Certified by NFS
+ Reminerization on RO water.
$$, $210/year3.632 GPD
+ WQA Gold Seal Certification
+ 90 GPD production rate
+ Made In US
$$$, $56/year4.790 GPD
Aquasana AQ-5300R
Aquasana AQ-5300R
+ Certified by NFS
+ Remove only harmful minerals.
+ Fast flow rate of 0.5GPM
+ Filter replacement reminder
$, $130/year4.20.5 GPM
+ WQA Gold Seal Certification
+ 90 GPD production rate
+ Alkaline Remineralization Filter
+ Made in US
$$$, $85/ Year4.790 GPD
iSpring RCC7AK
iSpring RCC7AK
+ WQA Gold Seal Certification
+ 75 GPD production rate
$$, $82/year4.675 GPD
Home Master TMHP
Home Master TMHP Hydroperfection
+ Patented Reverse osmosis system which remineralized twice on the filtered water
+ Waste water is just 1 gallon
+ Innovative Design on system
+ Made in US
$$$$, $150/year4.875 GPD
Home Master TMAFC
Home Master TMAFC
+ Patented Reverse osmosis system which remineralized twice on the filtered water
+ Innovative Design on system
+ Made in US
$$$. $87/year4.950 GPD
Express Water ROALK5D
Express Water Reverse Osmosis ROALK5D
+ Rigorous test on every product
+ Alkaline remineralization filter included.
+ The most affordable RO Alkaline water filter
$$, $120/year4.850 GPD
*Flow rate based on gallons per day (GPD) and gallons per minute (GPM).

Based on the customer rating on the right, it is easy to distinguish the good from the bad ones. Let us summarize based on the majority of people’s preference.

Budget Standpoint:

If you are on a tighter budget, you probably will need to look for something like the APEC ROES-50, iSpring RCC7, and the Express Water RO5DX. Those are the affordable systems which will keep your yearly budget low.

Alkaline Remineralization:

If you are having a higher budget, you can choose for systems that contain alkaline remineralization filters for a better taste and beneficial minerals in the filtered water. It applies to systems like Home Master TMAFC, APEC RO-PH90, and the Express Water ROALK5D.

Family Size:

5oGPD flow rate is good for a family of 6. It is recommended to go for a capacity of 75GPD and above for a larger household. Some of the great ones are Home Master TMHP and APEC RO-90.

Not Recommended:

Aquasana is great in their whole house water filter. However, their drinking water filter systems still aren’t able to compete with others. Hence, we do not recommend any of the Aquasana drinking water filters.


Our Winners

We categorize our winners based on different categories. All of the winners are excellent in providing filtration to remove contaminants in your source water.

Best Under Sink Water Filter: Home Master TMAFC

Home Master TMAFC is deemed to be the greatest under sink water filter of all times. We rate them based on the 3 criteria below:

Home Master TMAFCFiltration Quality

Home Master did 4 innovative changes to this system compared to others.

  1. All in One Canister Filter:  Eliminate the chances of bacteria accumulate in the canister.
  2. Increase flow rate with bigger food grade tubes.
  3. “Push-in” tubes to eliminate wrenches.
  4. Patented Full Contact remineralization flow that remineralized the filtered water twice.

High-Quality Filter:
Each cartridge can last for at least a year of filtration. This indicates that the filter is built with great technology to withstand a longer period of filtration.

Cost Effectiveness

Initial investment in this system is considered moderate. Slightly expensive than other brands.

The annual replacement cost is approximately $87 which is average across 5 years. This amount is rather reasonable for a system that can produce clean and remineralize drinking water.

Customer Satisfaction

It received the highest rating among all others from its customers based on quality and filtration capability. Many customers are very satisfied with its performance.


5 Years Warranty:
Home Master comes with 5 years limited warranty on all their reverse osmosis systems. They stood by the quality of their products which is a sign of great quality. You can rest assured that you are getting the best system in the market.


Verdict: With all the various reason above, this system undoubtedly the one of the best drinking water filter available in town!



Check out our #1 recommended online recommended store,

Home Master TMAFC Reverse Osmosis Water FilterBuy-Now-Amazon

Click on the button above to check `the reviews of the product from existing customers.

For a more in-depth analysis, kindly visit our detailed review page of this filter.


Under Sink Water Filter With High Flow RateAPEC RO-90

APEC has always been well known for their quality and functionality of their systems. Their products are always on top of the list on Amazon.

For this case, we use the following criteria to select APEC RO-90 as the best high flow rate water filter.

Filtration QualityAPEC RO-90

Quality of filter system is always our top priority of determining the best water filter. Below are a few great aspects of this system.

High Flow Rate:
This system is the highest flow rate among all the other system that is available in the market. With a flow rate of up to 90 gallons per day, it is definitely suitable for a household that is more than 8 people.

WQA Gold Seal Certification:
The RO-90 is one of APEC’s reverse osmosis water filter to have received a WQA Gold Seal Certification. This is a quality assurance from WQA on the quality and functionality of the system.

Long Lifespan Filter:
Another aspect of quality comes from the filter cartridge. The suggested schedule of filter replacement is one year. This indicates that their filters are highly effective and efficient which doesn’t require constant replacement to maintain it’s standard.

Cost Effectiveness

With an initial price tag of less than $300, it is considered reasonable as it can supply filtered water for up to 10 people in a house.

In addition, the annual maintenance cost is on average $50 which is relatively low to maintain such a high-efficiency filter.

Excellent Customer Rating

With an extremely high rating (4.8/5) from existing customers, you can rest assured to receive a high-quality water filter from APEC.


Verdict: APEC RO-90 definitely worth every penny that you invested for a high flow rate under sink water filter system.



Check out our #1 recommended online recommended store,

APEC ULTIMATE RO-90 Reverse Osmosis Water FilterBuy-Now-Amazon

Click on the button above to check `the reviews of the product from existing customers.

For a more in-depth analysis, kindly visit our detailed review page of this filter.


Best Under Sink Well Water Filter: Home Master TMHP

Home Master TMHP HydroPerfection is one of the top graded under sink water filter in the market. If your house is using the well water source, you shouldn’t miss out this system.

Filtration Quality

This 9 stage reverse osmosis system is the “big brother” for Home Master TMAFC, our best under the counter water filter mentioned above. It comes with additional great features such as the following:

UV Sterilizer:Home Master TMHP Hydroperfection
Well water source, as you might know, is a very contaminated source water. Microorganism such as bacteria and virus is often found in those water.

UV light chamber is used to kill the microorganism by altering their DNA structure leaving.

Remove Iron:
The system removes Iron, which is one of the contaminants that often appear in well water source.

Although Environmental Protection Agency, EPA confirms that iron is a secondary contamination, it will alter the taste of your food and the water that you drink. It is best to be filtered away.

Great Filter and System:
Home Master is known for producing high-quality filters for their system. All of their cartridges are capable of lasting for at least 1 year.

Remember the 4 innovative design from Home Master TMAFC that we mentioned above? It is all available in this system as well.

Cost Effectiveness

For all well water filtration system, it comes at a higher cost. This is due additional filtration stage is required to remove heavy contaminated water source.

The annual maintenance cost is on average $150 which includes the annual replacement of the UV light bulb and the iron filter.

Waste Water Reduction: 

Reverse osmosis owners often pay more water bills due to the waste water that was produced by the system.

The Home Master TMHP is capable to achieve a 1:1 ratio of waste water which sees a 4X water saving compared to the conventional system. It is among the best of all reverse osmosis system.

Customer Rating

It receives excellent ratings from its existing customers (4.7/5) mainly on the quality, effectiveness, and performance. It is a great system especially for the household using well water source.


Verdict: Home Master TMHP undoubtedly is one of the great systems which can withstand harsh conditions from the well water source. Although it is expensive, it is worth every penny that was spent toward safeguarding the health of you and your family.



Check out the system in our #1 recommended online recommended store,

Home Master TMHP HydroPerfection  Water FilterBuy-Now-Amazon

Click on the button above to check the reviews of the product from existing customers.

For a more in-depth analysis, kindly visit our detailed review page of this filter.


Affordable Water Filter: APEC ROES-50

APEC ROES-50 Water Filter Assurance

APEC ROES-50 is one of the affordable reverse osmosis system available in town. With just under $200, you can have a high-quality drinking filtration system.

We don’t just compare the price across all system. Most importantly we care about the quality. Below are the few key points that we liked about the system.

Effective System

It is a 5 stage filtration system which consists of an excellent reverse osmosis membrane that guaranteed removes most of the contaminants in the following. APEC RO-CTOP Contaminant Removal

Arsenic, Lead, Radium, and Barium and some of the most dangerous contaminants which can accumulate in our body as times goes by.

Besides, VOC, chlorine taste and odor are also removed by the two stages carbon block filter in stage 2 and stage 3.

A larger than standard 4-gallon storage tank is used to store clean water which is able to provide water instantly when is required.

Efficient System

The frequency of replacement indicates whether a system has a great technology or just a normal typical water filter.

In this case, the APEC ROES-50 shows that it backed with innovative technology in building the filtration cartridges.

The lifespan of each filter is at least a year, which is twice as much as the conventional system. Those conventional systems required constant replacement to maintain the quality of the water as advertised.

Apec ROES-50 Filter Lifespan

In addition, the whole system is designed and made in the US to make sure that the quality is at it’s highest standard.

Low Cost:

In many cases, some of the systems come with a low initial investment but followed by a high yearly maintenance cost.

For APEC ROES-50, you can rest assure that the initial investment and annual maintenance cost is the lowest among all system.

With just merely $40 a year, it is 60% cheaper than an average person spending on bottled water every year. Don’t forget, the filtration system is for the entire household.

Annual Maintenance Cost: $40

3000 Astonishing Reviews

This system has garnered over 3000 excellent reviews from it’s existing customers. It is consistently ranked on the number 1 best seller item for under sink water filter on Amazon.

This is the result of a 20-year-old company with great technology.


Verdict: APEC makes the ROES-50 so affordable to purchase and maintain that you don’t have any reasons for not investing in a water filtration system. It’s proudly made in the US so that the quality and standards are at the highest.



Check out the system our #1 recommended online recommended store,

APEC ROES-50 Reverse Osmosis Water FilterBuy-Now-Amazon

Click on the button above to check on the latest discount and reviews from happy customers.

For a more in-depth analysis, kindly visit our detailed review page of this filter.


Certified Under Sink Water Filter: iSpring RCC7

iSpring RCC7 is one of the entry models for reverse osmosis system.

Although it is just an entry model, it has been one of the best seller systems in the market which is on par with the APEC ROES-50.

Let’s take a closer look at this filter.

iSpring RCC7 Reverse Osmosis Water Filter System

WQA Gold Seal Certification

Among the system in the same class (entry model), the iSpring RCC7 is the only one that receives a Gold Seal Certification from WQA.

To obtain this award, the system needs to go through a rigorous test and checks and verified the claims that were made by the company.

It is a tedious process and the RCC7 has made it through.

Affordable Yet Effective

While the price is under $200, it is effective in removing contaminants.

It is a 5 stage RO system which iSpring claims that it can remove up to 99% of the 1000+ pollutants in the source water.

With the annual replacement cost of $48, it is one of the lowest in terms of maintenance cost.

Higher Production Rate 

While some of the expensive RO systems only produce up to 50 GPD of pure water, the iSpring RCC7 is capable of produce up to 75 GPD of filter water.

This advantage puts this filter ahead of its competitor on targeting bigger household owners looking for affordable RO system.


Verdict: The iSpring RCC7 is definitely a good under sink water filter system which provides excellent filtration, great flow rate, and affordability filter. Don’t forget that it is widely recognized by the Gold Seal Award given by WQA.



Check out the iSpring RCC7 in our #1 recommended online recommended store,

iSpring RCC7 Reverse Osmosis Water FilterBuy-Now-Amazon

Click on the button above to check the reviews of the product from existing customers.

For a more in-depth analysis, kindly visit our detailed review page of this filter.


Best Alkaline Under Sink Water Filter: APEC RO PH-90

The APEC RO PH-90 has similar features compare to the RO-90, our best flow rate under sink water filter.

It receives an extremely high rating from its existing customers.

Why is it so? Let’s take a look at the features.


Filtration Quality

APEC RO PH-90 was certified to reduce contaminants such as arsenic, barium, lead, mercury, fluoride, chlorine and many more up to 99%.

What’s different is it includes a state-of-the-art natural alkaline remineralization filter at the end to return the great taste of water.

WQA Gold Seal Certification

The APEC RO PH-90 received a Gold Seal Certification from WQA to ensure the quality meets a standard set by the independent body.

This is the highest award that one water filter can receive to acknowledge the performance of the system.

Higher Production Rate and Long Lifespan Filter

One of the highest in the reverse osmosis water filter industry, 90 GPD. It is most suitable for a big family of 8 which is looking for an alkaline water filter to fit the family needs.

The filter only requires replacement after 1 year of usage and compare to the system which has remineralization features, the cost is much more affordable.

Annual Replacement Cost: $85 Per Year

High Customer Rating Score

This system received 4.8/ 5 of the excellent score from the existing customers from Amazon. It is one of the highest among the alkaline water filter.


Verdict: While it might be slightly pricer to own this system, but the APEC RO PH-90 did provide a great coverage on removing contaminants and remineralize the filtered water to make it feels great again. It is the best among all the high end alkaline water filter.



Check out the APEC RO PH-90 in our #1 recommended online recommended store,

APEC RO PH-90 Alkaline Reverse Osmosis Water FilterBuy-Now-Amazon

Click on the button above to check the reviews of the product from existing customers.

For a more in-depth analysis, kindly visit our detailed review page of this filter.


Criteria For An Excellent Water Filter

Are you puzzle on choosing the best water filter for your kitchen?

Puzzle of Choosing Water FilterThere are so many products on the market which claims they are the best in the market. Is it really the case?

The easiest way to determine which system suits you is to identify the problem that you intend to solve. It isn’t that hard to pick a good drinking water filter for your home.

I will give my formula for choosing a great water filter with the following criteria below:

Filtration Quality:

  • How well in percentage does the filter remove contaminants?
  • Does it specify which contaminants that it removed?
  • What is the micron ratings that it can filter up to?
  • If it is a reverse osmosis system, what is the TDS rating after filtration?

Cartridge Replacement:

  • How long does the lifespan of each filtration cartridge?
  • The longer the lifespan of filters means that the better technology that was used on the cartridge.


  • Is this system within your budget?
  • What is the annual maintenance cost of the system across 5 years?


  • Most systems required drilling in order to secure the system under the sink. Does it require complicated installation that incurred additional installation cost?

Reviews Reviews Reviews:

  • Lastly, looks for reviews from existing customer. They will give you an insight into how well the filter is able to perform. It will save your time for returning a product that isn’t solving your problem.

With these criteria above, you won’t get it wrong when buying a water filter.


Why Do We Recommend RO System?

I must admit that in, we are leading more towards reverse osmosis technology on drinking water filter.

There is certainly some non-reverse osmosis system which is great in terms of filtering contaminants. However, the RO system is the most complete and comprehensive water filter system that I encounter.

Benefits and Drawback

Let’s take a look at the advantage and disadvantage of the system:


Pure Water

Reverse osmosis water filter removes practically everything from the water leaving just pure water behind.

While some might concerned that it removes the beneficial minerals too, our argument is that the beneficial minerals appear in water are neglectable as compared to the mineral that is consumed from food.

Micron Ratings

The micron ratings of reverse osmosis membrane are so fine, 0.00001 micron which practically capable of removing all contaminants.

It is 10000 times thinner than an average human hair. Most of the bacteria are capable of being filtered by the membrane leaving just clean water behind.

Storage Tank

Most of the reverse osmosis system comes with a storage tank which will help on getting clean water at a much faster pace.


Every type of products comes with the downside as well and this applies to all reverse osmosis filters.

Waste Water

Reverse osmosis system will drain out the water which can’t pass through the membrane. Those waste water normally have already been through at least 2 stages of filtering.

It might not be qualified for drinking, the waste water certainly can be channeled to other usages such as dishwashing, gardening and even laundry.

Zero Mineral In Water

There aren’t any beneficial minerals appear in the water unless some models come with a remineralization filter. This made it slightly acidic and bald taste.

According to WQA, the slight acidic filtered water from the reverse osmosis system are safe to consume as post no harm to our body.


Despite the disadvantages, we still believe that the reverse osmosis technology creates some of the best under sink water filters in town based on the capability of removing contaminants.


Why Under Sink Water Filter?

There are so many types of water filter int the market such as countertop, whole house, faucet, ionizer and water pitcher. Why should we choose a bulky under sink water filter?

WHy CHoose This

If you are talking about drinking water filter, in most cases, under sink water filter tends to be the cleanest machine you will ever get in the market. Here is why I say so.

Awesome Filtration Capability

For other drinking water filters like countertop, faucet and water pitcher, their capabilities have been a trade-off with size and portability.

Those systems required minimum or no installation as they were designed to plug and use in every single home.

Anyone that purchases an under sink systems is not much concern about the space and portability. They just need their water to be free from contaminants.

Expensive Investment, Cheap Running Cost

Traditionally, under the counter systems are much expensive than other types of water filter. It terrifies most of them and went to search for alternatives.

What you didn’t know is the some of the under sink filters are cheaper in the yearly maintenance cost as compared to the water pitcher.

This is due to the filter replacement happens once a year for under sink systems while water pitcher requires replacement every 1-2 months.

Hide Under The Sink

You won’t be seeing tubing or canister sticking out from your kitchen.

As a homeowner myself, I would like to make sure that all the tubings and pipes to be hidden from public view.

Other the other hand, you will have more rooms around the sink to do your kitchen chore.


It is time to make a choice now! I would always recommend going for best under sink water filter as it is great and affordable in the long run. Check out the Home Master TMAFC as it is the most effective and affordable RO water filter in the market. 

8 thoughts on “Top 6 Best Under Sink Water Filter For 2018

  1. HI,
    some say the taste of the water is subjected nature. but i believe that We all need a good water that is free from bacterias ,and other viruses . a water with good quality taste . i also believed in selective filtration can make effectively reduces the most contaminants in water . thank you for this educative article on how to choose a good water filter .

  2. Wow, you made a very detailed review. My aunt uses a portable alkalinizing water filter before and it broke down in under a year of usage. She was really frustrated. She might find this is helpful as she’s considering to buy another filter system. 🙂

  3. This is a very helpful article for people looking for alternatives to bottled water! Water is something we drink every day (hopefully) and it’s one of the most important things for our health along with food and sleep. We should definitely be paying attention to what’s inside it. Thanks for providing so many recommendations!

  4. Wow what a detailed article ! Thank you for the work you’ve put up with to share this with us. I really liked the pros and cons table. Commercials just want to sell their products so I better trust this article the next time I need an upgrade.

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