10 Best Under Sink Water Filter System | Find Your Ideal One In 2020
Are you frustrated to find the right under sink water filter to meet your water filtration needs? Aren’t you sure which system will best serve your immediate and long-term needs?
No need to be worried!
You’ve landed the right place.
Many brands are offering different models on under counter water filter, so choosing the best among them may prove to be a daunting task.
However, we’ve conducted thorough research and testing out 100+ filtration systems to recommend you the best under sink water filters. And finally, we’ve listed 10 top- notch products.
Below is the 10 best under sink water filter system reviews and a comprehensive buying guide.
Let’s get going to discover them.
Table of Contents
- Comparison of our Favorite Under Sink Water Filters
- Top 10 Best Under Sink Water Filter Reviews 2020
- 1. Best Overall- CuZn UC-200 “Incredible Capacity and lifetime”
- 2. Best Value Under Sink Water Filtration System - Woder 10K-Gen3 Ultra High Capacity
- 3. Best 3 Stage Under Sink Water Filter - APEC WFS-1000 (With Faucet)
- 4. Best Under Counter Water Filter With Faucet - Aquasana AQ-5300
- 5. Best For The Price - Culligan Water Filter US-EZ-4
- 6. Best Budget Under-Sink Water Filter - Filtrete Advanced
- 7. Best Design Under Sink Water Filter- Ecosoft (with classic faucet)
- 8. Best For Flow Rate - Aquasana AQ-5300+.55 (3-Stage) with Bluetooth connectivity
- 9. High-end Under Sink Water Filtration System - 3M Aquapure Ap DWS1000
- 10. Best for Features - 3M Aqua Pure 3MFF100
- How to Choose the under Counter Water Filter
- Under Counter Vs. Countertop Water Filter
Comparison of our Favorite Under Sink Water Filters
Filter Capacity (gallons):
Flow Rate (GPM):
1. Best overall- CuZn UC-200
2. Best Value - Woder 10K-Gen3
3. Best 3 Stage APEC WFS-1000 (With Faucet)
Designed for up to 5
4. Best Filter With Faucet - Aquasana AQ-5300
5. Best for The Price - Culligan US-EZ-4
6. Best Budget - Filtrete Advanced
7. Best Design - Ecosoft (with faucet)
8. Best for Flow Rate - Aquasana AQ-5300+.55
9. High-end Filtration System - 3M Aqua-Pure AP-DWS1000
9. Best for Features - 3M Aqua Pure 3MFF100
Top 10 Best Under Sink Water Filter Reviews 2020
“A Range Of Best Under Sink Water Filtration System just For You”
1. Best Overall- CuZn UC-200 “Incredible Capacity and lifetime”
We start our reviews with one of the top-rated under counter water filter from CuZn brand. If you’re looking for the ultra-high capacity under counter water filter to fit your specific needs, this CuZn UC-200 water filter can be a great buy.
CuZn UC-200 offers you incredible capacity and warranty. This unit is capable of filtering 50,000 gallons of cold water on demand. It also offers impressive 5 years pro-rated warranty.
This water filter uses 3 stages filtration process. It utilizes micro sediment membranes. The second and third stages include kdf-55 filtration media, and coconut shell carbon filtration.
So, what will this filter remove?
Well, the list is endless. We can’t mention every contaminant here.
However, it’s safe to learn that it will reduce a wide variety of inorganic contaminants that may affect the quality of your water supply. Its acid washed coconut shell activated carbon reduces organic contaminants and offensive odor & taste of water. Importantly, it’ll reduce all these contaminants without removing health beneficial hardness minerals.
CuZn UC-200 removes the hassle of the third faucet. The system is easy to install, and you can do it in about 5 minutes. With the help of an adjustable wrench, you can connect it directly to your kitchen sink’s water line. Additionally, it offers a flow rate of 2 GPM. Once properly installed, it’ll have almost no impact on water flow.
The downside of this unit is as its’ not a water softening system; it can’t resolve excessively hard water issues caused by extremely high mineral content. It works only with municipal water, not perfect to use with private well water.
- Excellent capacity and lifetime
- Designed for use with MUNICIPAL WATER
- 3 stages filtration process
- Not Susceptible to Mold or Bacteria Growth
- Simple to install
- Tested to NSF standard 42 and 61
- It doesn’t resolve excessively hard water issues.
The CuZn UC-200 offers an unmatched 3-stage water filtration process that creates the cleanest, freshest water possible. It effectively works in eliminating the odor and greatly improving the taste of your drinking water.
To sum up, the UC-200 is class-leading value.
2. Best Value Under Sink Water Filtration System - Woder 10K-Gen3 Ultra High Capacity
“Powerful Single Stage Filtration, Much Healthier Than Water Filtered By Reverse Osmosis”
Take your water filtration process to the next level with this Woder 10K-Gen3 under sink water filter. This filter is built with the finest material tested and approved by independent laboratories. So, you can rely on the quality of Woder-filtered water.
What’s more, you shouldn’t be concerned about total dissolved solids in drinking water. Woder filters use unique Advanced Selective Filtration Technology to offer safe and pure water. It removes over 99.99% contaminant while retaining all essential minerals beneficial to your health.
Importantly, this filter offers 10,000 gallons of water through the filter before it needs replacing. It’ll purify your water for 3 years with normal use. This value is as much as 6 times longer than many filters available.
When it comes to convenience, this unit requires no plumbing to install. You can install it under US kitchen and bathroom sinks in minutes. It comes as a complete assembled kit so no more additional little purchase.
- Impressive filtration capacity
- Removes over 99.99% of contaminants
- Offers water as pure and healthy as spring water
- Easy to install, Direct Connect Water Filtration System
- Comes with everything you need to install
- Only works with municipal treated cold water. Not perfect for well water
For enjoying pure, healthy, spring-fresh water from the tap, Woder 10K-Gen3 is an excellent choice. This unit is not too much expensive, easy to install, and it’s long lasting.
3. Best 3 Stage Under Sink Water Filter - APEC WFS-1000 (With Faucet)
“The Most Effective Filtration Technology in the Industry, High-Performance”
If you’re looking for a super capacity premium quality 3 stage under-sink Water Filter System then APEC WFS-1000 may be just the thing you need.
Firstly, this system is designed and assembled in the USA. Its construction features high-quality materials selected around the world to offer reliable, long-lasting performance.
Secondly, its super capacity filter treats well water and municipal water providing a continuous on the supply of clean, safe, refreshing water directly to your tap. Depending on usage, it’ll last over 12 months.
Importantly, APEC WFS 1000 3 stage filter is backed by lifetime support from WQA certified water specialist. Also, it comes with an amazing one-year satisfaction guarantee.
It’s worth noting that the unit comes with 100% lead-free chrome faucet. The package also includes FDA certified JG food grade 5 feet tubing to ensure safe water flow.
So, are you thinking that APEC WFS-1000 would be an expensive product? Believe me; the price will surprise you as it comes at a pocket-friendly price tag.
Finally, this system works well in an RV if the minimum incoming water pressure to the filter is greater than 20 psi.
If you’re looking for the best portable RV water softener, there are 7 best options for you.
- Heavy-duty, trouble-free
- Double capacity, Lang lasting filters
- Fast water flow, no tank needed
- No wasted water, environment- friendly
- Keep important minerals
- 3 cartridge unit, so it needs more spaces to install under the sink
- Customers wish to have a clear canister for the 1st stage grit filter
Bottom line: How about the bottom line?
APEC WFS-1000 is America’s top-notch water filter. If you’re looking for a highly effective filtration system at a great price, this is the right product for you. To allow your whole family to turn on the faucet and drink fresh water, give a try to this water filter.
4. Best Under Counter Water Filter With Faucet - Aquasana AQ-5300
“Performance Promise, Economical”
Aquasana AQ-5300 is one of the best under counter water filtration system that comes with 100% lead-free faucet. The all-metal stylish design faucet (brushed nickel, chrome or bronze) will certainly match any kitchen decor.
This Aquasana’s under mount water filter with 3 filtration stages that Remove up to 99% of 77 contaminants while selectively leaving the healthy minerals in the water. You can use it with municipal and well water.
What’s more, the full system is certified to NSF/ANSI standards to ensure that the leach contaminants won’t back into your water. It’s also the first and only filter with P473 certification.
Aquasana AQ-5300 can filter 600 gallons of water. However, your water contamination and your usage rate are low, it will last longer, even up to 14 months.
One of the advantages of using this filter is it doesn’t waste water while using the system like the reverse osmosis systems. So, Aquasana AQ-5300 offers you the economical way of water filtration.
This system offers you something really cool. The indicator will alarm you when it’s time to replace the filters. The battery for the indicator includes with the set.
- Good for both well and municipal water
- Offers a smarter filtration system
- Made with high-quality materials
- Stylish metal faucet
- Premium finishes
- Zero water waste, economical
- Easy to install, use and replace
- Flow rate is a little bit low for some people
Bottom line: If you’re not satisfied with the contents and quality of your well or municipal water, but still don’t like to install a reverse osmosis system, you can rely on Aquasana AQ-5300. This unit is NSF certified, and efficient against a broad range of contaminants including heavy metals.
5. Best For The Price - Culligan Water Filter US-EZ-4
“Handy Installation, Best Fit To Meet Your Water Filtration Levels”
Next, we have this excellent under sink water filter from Culligan. For those who don’t know Culligan is the industry-leading brand name in the field of water softening and filtration products around the world.
This US EZ-4 is one of the best undersink water filtration systems with a faucet that you can settle for. The included lead-free faucet can be installed in most sinks providing safe, clean, great-tasting water for drinking or cooking. Furthermore, it offers 0.2 GPM (at 60psi) water flow rate from the faucet.
The unit comes with RC- EZ-4 cartridge that can filter up to 500 gallons or works for 6 months depending on usage. Additionally, it is certified by NSF International to NSF/ANSI Standard 42. That means it’ll make sure that the filtered water doesn’t have a nasty chlorine taste or odor. And it’ll also reduce Class-I particulates, cyst, lead, VOC and much more.
Culligan water filter system US-EZ-4 offers a very easy twist-on/ off mechanism to change out when the cartridge needs to be replaced. The quick connect fittings make the installation process easier.
One of the nice features of this product is its built-in LED filter life indicator that will remove the guesswork when to change your filters.
It’s important to note that you can upgrade the cartridge in all Culligan EZ Change. The company offers RC EZ-1, RC EZ-3 and RC EZ-4 cartridges that are all interchangeable that will allow you to meet your filtration level needs.
- Designed for convenience
- Can be installed and replaced in minutes
- Long lasting filter
- The nob is hard to grip and turn on/ off
In fact, Culligan US-EZ-4 is one of the best water filters with faucet in this price range. Handy twist-on/ off installation mechanism removes the need of hiring a professional plumber. Overall, Culligan water filter under sink is the best option if you’re looking for adding an additional faucet to your sink for enjoying clean and fresh water all the time.
6. Best Budget Under-Sink Water Filter - Filtrete Advanced
“Lower Cost, But Effective”
Next, we have this best budget-friendly under sink water filter from Filtrete. If you want great tasting water at an affordable price, then the Filtrete Advanced under sink water filter can be the best choice for you.
It’s a good choice to add filtered and great taste water to an existing faucet easily. That means you don’t need to deal with an additional faucet which can take up the extra room around your sink. You can connect this filter directly to your cold water line and enjoy fresh drinking water straight from your tap!
When it comes to performance, NSF certified this healthy living filtration system reduces lead, microbial cysts and other health effect contaminants throughout your home. It also reduces that horrible chlorine odor and taste.
Importantly, the system is easy to set up. With a screwdriver and an adjustable wrench, you can easily connect it to any bath faucet or your kitchen in less than 30 minutes. Convenient! Isn’t it?
What’s more, with 2000 gallons filter capacity, this bad boy offers 6-month filter life. And you can replace this long lasting replacement filters with just a twist.
Another great advantage of using this unit is it maintains full water flow at 2.25 GPM on your existing faucet. Filtrete also offers two more replacement filters for this model- STANDARD and MAXIMUM replacement filters. All the three replacement filters are interchangeable with the system.
- Easy DIY Install
- Convenient to use
- Effective filtration
- Super easy replacement
- NSF tested and certified
- It reduces most contaminants. But it won’t eliminate all common water born problems.
Bottom Line: Filtrete Advanced under sink water filter is a great budget-friendly option. It costs less, but it’s very effective at reducing health effect contaminants from water. If you want to enjoy clean and fresh smelling water straight from your tap without spending a fortune, Filtrete Advanced is one of the best options for you. Certainly, you won’t find anything better at this price tag.
Overall, it’s an effective filtration system at a good price.
7. Best Design Under Sink Water Filter- Ecosoft (with classic faucet)
“Excellent performance, Good price”
Here’s an affordable but high quality 3 stage under sink water filter from the brand Ecosoft. If you want to enjoy pure, clear water with all the beneficial minerals intact, you won’t go wrong with this filter.
In terms of performance, this unit treats water in 3 full purification stages. The unique German-engineered technology removes bad smells, taste, various harmful contaminants including heavy metals and makes your water as fresh as ever.
The BPA-free plastic ensures that you’re getting the freshest water possible. Additionally, it comes with a stylish kitchen faucet to help keep your family healthy and hydrated by providing clean water.
When it comes to convenience, the simple leak-proof DIY installation lets you install and use the unit easily. It comes with every accessory you need for installation.
- Designed and manufactured in Germany
- 100% European Design
- High performance
- Easy to set up and use
- Long lasting filtration
- Low flow rate
This unit offers multi-stage filtration in a sleek and compact undersink design. It’s perfect for use in offices, homes, recreational properties, cottages and RVs. The Ecosoft 3-stage under sink water filter provides high-quality drinking water with less cost and hassle than bottled water.
Overall, it’s an excellent filter for a very good price.
8. Best For Flow Rate - Aquasana AQ-5300+.55 (3-Stage) with Bluetooth connectivity
“A smarter, economical water filtration system”
Here’s another interesting and best under sink water filter system from the Aquasana brand. This time it’s AQ-5300+.55. This model offers some excellent feature when it comes to filtering your water.
Firstly, it comes with 800 Gallons capacity and offers an impressive flow rate of 0.72 Gallons/Minute (44% faster). It’s the most economical filter on the market. If you compare 1 Aquasana filter is equal to 20 leading gravity-based filters. The included sediment pre-filter enhances its performance to provide you with a full 800 gallons of pure water.
In fact, it’s a “zero waste” filter that means no water is wasted during the filtration process. What’s more, no harmful contaminants will be added back into the filtered water.
Aquasana AQ-5300+.55 turns your ordinary tap water into extraordinary, clean water. Certified to NSF/ANSI standards 42, 53, 401 and P473, this unit will offer you the promised performance. This 3-stage filtration system removes up to 99% of 77 harmful contaminants including VOC, PFOA and PFOS. But at the same time, it’ll retain beneficial natural minerals like potassium and calcium.
Furthermore, the AQ-5300+.55 comes with a premium dedicated faucet. The faucet is 100% metal and lead-free. Furthermore, it’s available in a variety of finishes (brushed nickel, bronze, or chrome), making it perfect to match your décor and existing faucet.
This unit not only turns your tap water pure, odorless and tastes good but also alerts you when you need to replace old filters. One of the nice features of this unit is its Bluetooth connectivity. Now you can track gallons filtered, estimate your dollars saved, measure environmental impact and receive alerts when it's time to change your filters.
- A smarter system with Bluetooth connectivity
- Removes up to 99% of 77 contaminants
- Retains beneficial natural minerals
- 44% faster water flow
- Easy to install and replace
- Bluetooth app is available only on iOS. No Android version of the app
- The faucet handle isn't functional
- Relatively expensive
To sum it all up:
If you don't care about the Bluetooth app, you won’t go wrong with this purchase. It’s fairly compact, lower cost of the initial system, offers less expensive replacement filters. Overall, the offers very good quality water, attractive faucet and easy installation. Despite being more expensive, it can be a better buy.
9. High-end Under Sink Water Filtration System - 3M Aquapure Ap DWS1000
“Expensive, But the Most Effective”
Next, we have this high-end under sink water filtration system from 3M Aqua-Pure, a famous household brand name renowned for trusted, innovative filtration technology. The system is effective for use on both municipal and well-water systems
3M under sink water filter AP-DWS1000 is an attractive filtration system. It’s designed to perform as good as it looks. It incorporates advanced dual-stage carbon-block filtration system that ensures clean, better tasting water. Additionally, this NSF certified unit reduces lead, cyst, VOCs and more. It also reduces particulate and rust to help preserve fixtures and plumbing.
When it comes to convenience, you can connect this unit easily under the kitchen sink. It comes with all the necessary accessories needed for installations. It also comes with an attractive looking dedicated water faucet. The sanitary twist-off cartridge change technology provides easy and fast cartridge change with minimal effort.
There is also a built-in shut-off valve. You can change the filters without shutting off the water supply. Additionally, the automatic shut-off will remind you to replace the cartridge.
- A painless and hassle-free filter replacement
- Advanced dual-stage carbon-block filtration
- Prevents rust from helping preserve fixtures and plumbing
- Automatic shutoff meter
- Sanitary twist-off cartridge design
- Attractive polished chrome dedicated faucet
- The installation manual is somewhat confusing
- Fairly expensive
What is our final thought?
Well, 3M Aqua-Pure AP-DWS1000 is really an effective unit in reducing a wide range of water contaminants. If you’re looking for great tasting, crystal clear water for your small restaurant or family, this best undersink water filter represents an attractive prospect for a filtration system, and therefore you should consider buying it.
10. Best for Features - 3M Aqua Pure 3MFF100
“Exceptional Features, Great Tasting Water Right from Your Faucet”
If you’re looking for a Full Flow Water Filter System, then you’ve finally found it. This 3M under sink water filter 3MFF100 is the newest addition of the 3M Aqua-pure filter family. Certified by the WQA, this advanced water filtration system has a 6000-gallon capacity, which is the three times more capacity of any first generation filters.
The filter adapter connects to the existing bath or kitchen faucet for full flow filtration. The tested flow rate is 2.5 gallons per minute and will work at a higher pressure – up to 125 PSI.
The unit requires minimal under sink space to install — no need to drill holes in the sink for a separate faucet that could affect kitchen décor.
It comes with 0.2 microns rating that means it’ll eliminate all particles larger than 0.2 microns in size. This rating is better than most other methods of filtration. However, it retains the metals that are beneficial for the human health such as potassium, and calcium
This 3M Aqua-Pure 3MFF100 also offers some more great options:
- Advanced triple stage carbon-block- to reduce particulate class 1, chlorine taste and odor, cyst and lead
- Sanitary Quick Change (SQC) cartridge technology- to provide hassle-free, quick cartridge change
- Built-in valve- to shut off the water when replacing the filter
- Advanced triple stage carbon-block filtration process
- Capture all particles larger than 0.2 microns in size
- Fast flow rate, water flow doesn’t slow down
- Comes with everything needed for a standard installation
- Suitable for municipal water only, well water may clog it.
- Installation needs additional proprietary parts and not universal ones.
Although 3M Aqua-Pure 3MFF100 is one of the expensive under sink systems, you can trust regarding your water quality concerns.
How to Choose the under Counter Water Filter
So, after making a decision to drink odorless, healthy water and figuring out that an under counter water filtration system is the best option for you, what is the next thing?
Some factors you have to consider if you want to make a wise buying decision of the best under-counter water filter. We have a list of these to look out for.
So, are you ready to learn more? Check out the following-
Incoming Water Source
The first and important factor you should take into consideration is the type of your tap water. Some models work well with both municipal water supply and well water. While some other models are recommended only for municipal water. If your water source contains microorganisms such as lakes or well water, it’s good to go for a filter with reverse osmosis.
Under sink space
Next, you should consider available under sink space to set up the unit. If undersink space is a concern, opt for a single or 3 stages filter. If you have a lot of space, and require a premium model, you can easily handle 4 stages or more plus holding tank installation.
Capacity/ Filter life
When buying an under sink water filter, check that its filtering capacity is enough to meet your water needs. Under-sink water filtering systems offer hundreds of gallons filtered water and lasts up to six months or more. If your household’s daily requirement is two to three gallons per day, an under sink water filter may be enough to meet the needs.
Focus on the filters that come with certification for lead, chlorine and VOC. ANSI/ Standard 42 is important as chlorine is the main culprit for “bad-tasting” city water. Also look for the units which are ANSI/ NSF standard certified.
Installation and maintenance
Ensure that the installation process is easy and straightforward. Some systems are quite difficult to set up and you may need to call a professional. Make sure that the unit comes with an instructional manual that features a well-labelled diagram.
Effectiveness and efficiency
Verify that the unit provides pure, clean and great- tasting water to the maximum. Also, make certain that it doesn’t waste too much water.
- The Price
When making an under sink water filter buying decision, consider the cost for both the filtering system and the ongoing cost of replacement filters. Keep in mind that you’ll need to replace the filter regularly. So, unit cost and the filter replacement schedule gives a sense of long-term investment and cost-competitiveness.
If you’re searching for a more affordable water filtration solution, you may consider a countertop water filter.
The wide availability of the replacement filters
When choosing a model, take into consideration that the replacement filters are easy to find for the foreseeable future.
- Hardware quality
Consider the metal parts over plastic. The plumbing connections, piping, compression fittings and faucet (if any) should be metal-made.
Different manufacturers offer different warranties on their under sink water filters. You must be fully aware of the warranties offered by them. Our research shows that most units come with one year warranty and sometimes with a money back guarantee of one month.
- Reputation and reviews
Finally, it’s very helpful to find the filters’ user reviews both positive and negative. Reading the customers’ reviews will help you to get a full picture of how the unit performs beyond its certifications.
Under Counter Vs. Countertop Water Filter
In general, two types of water filters are available in the market.
But, a common question is which one is better?
Well, under counter and countertop- both types of water filters have their own advantages and disadvantages.
1. -are installed under the kitchen counter, keeps the clean look of your kitchen counter
2. Comprehensive filtration solution with multistage filters.
3. In general, comes with a high flow rate
1. Compact and can take up less space
2. Very easy installation, no drilling
3. Easy to move
4. cheaper than under-sink water filters
1. Somewhat larger than counter-top water filters
2. Requires more space to install than counter-top water filters
3. Installation is harder than counter top unit
4. slightly expensive than a counter top water filter
1. External pipe and canister exposed in the kitchen.
2. Unable to produce very large quantities of filtered water
3. Have a weaker water flow
Thanks for reading!
That was our unbiased 10 best under the counter water filter reviews and comprehensive buying guide.
Hope, you’ve found our reviews useful.
Under the sink- filter types are ideal for users with permanent homes. As once installed they require less maintenance. Further, they do not require counter top space in the kitchen.
So, Pick any of the best under sink water filter from our top 10 list and enjoy drinking water as pure and healthy as spring water!