10 Best Under Sink Water Filter Picks | Reviews & Recommendations

APEC WFS-1000 3-Stage

Rating: 4.6
Price: $$
Key Features: 3 filter stages, long-life filters, 1-year satisfaction guarantee, lifetime support

APEC Water filters and products are well known for their fantastic reverse osmosis systems, and this under sink unit is another of real quality.

Unusual for an under-sink unit, it features three stages of filtration. This makes it a highly effective water filter that is capable of removing a wide range of harmful contaminants.

The filters last longer than reverse osmosis systems and allow an impressive water flow rate too. They should last around 12 months before needing to be replaced. Be aware that this figure will vary depending on how much they are used and also the quality of water they have to filter. Let’s take a closer look at what each of the three filter stages does.

A great feature of these types of under sink filters is that they don’t remove any healthy minerals from the water. Minerals like magnesium, calcium, and potassium (which are good for our bodies) are removed from water by some methods of filtration, but not this one. Aside from being beneficial to our health, these minerals also make the water taste great too. The APEC WFS-1000 also uses two carbon filtration layers that help to refine the taste and odor of the water.

This system comes with an amazing one-year satisfaction guarantee, and also lifetime support from a team of WQA certified water specialists. An APEC product isn’t always the cheapest, but the manufacturer offers great support and builds quality.

What Else Should You Know about the APEC WFS-1000 Under Sink Water Filter?

• Designed, engineered and assembled in the USA;
• Premium long-lasting filters used to treat both city tap water and well water;
• This under sink water filter system comes with a 100% Lead-Free chrome faucet plus an FDA-certified JG food grade tubing.

Bottom Line

As a water filter for city/municipal water supplies, this is a great option. It’s low maintenance, and really effective at filtering chlorinated water. It also makes a big difference in the taste of city water.

Woder 10K-Gen II

Rating: 4.5
Price: $$
Key Features: 3-year filter lifespan, really low maintenance, money-back satisfaction guarantee

The Woder 10K is a really popular water filter due to its simplicity, and also its effectiveness at treating common water contaminants like lead. The huge lifespan of the filter makes this unit extremely good value too.

It is really compact and takes up little room under the sink. It comes with everything you need for installation and requires no expert skills to install in very little time.

The simplicity that we mentioned comes from the fact that once installed, it can be left to work for itself for 10,00 gallons of use or around 3 years in time. That’s pretty incredible and we’re not aware of many water filters that are this low maintenance.

Woder states that it is capable of reducing up to 99.9% of chlorine, lead, and heavy metals from water. It has been independently tested to NSF/ANSI 42 standards which means it will effectively remove chlorine from water and improve the taste and odor. This means it is also structurally sound and is durable and long-lasting. Importantly, it doesn’t remove healthy minerals from the water, and you can be assured of clean, healthy faucet water.

The Woder 10K also comes with an amazing money-back satisfaction guarantee. This under sink water filter reviews really well on sites like Amazon too.

What Else Should You Know about the Woder WD-S-8K-DC Water Filtration System?

• For the longest life, use this under sink water filter only with municipal treated cold water only, as it does not work with well water;
• The filter eliminates lead (99.9%), heavy metals, chlorine (99.9%), chromium 6, mercury, volatile organic compounds, carcinogens, and other contaminants, as well as water turbidity, odors, and bad tastes;
• The unit comes with ‘Direct Connect’ hoses that fit standard 3/8” water valves under U.S. kitchen and bathroom sinks.

Bottom Line

This under sink water filter gives amazing value for money due to the 3-year lifespan of the filter. It’s also about as low maintenance a water filter as you can get. It’s a great choice for city (treated) water.

You May Also Be Interested in the Woder WD-S-8K-DC Water Filtration System

iSpring CU-A4 4-Stage

Rating: 4.3
Price: $$$
Key Features: Effective water filtration, multiple installation options, easy change filters, 1-year money-back guarantee

Next on our list of best under sink water filter reviews is an iSpring product. As you probably know by now, iSpring makes some of the best reverse osmosis water filters on the market, also entering successfully the domain of whole house water filters.

The A4 combines four filtration methods into a powerful little package. It may be the most expensive of our best under sink water filter selections, but it’s also the most thorough in rejecting multiple contaminants. Let’s take a look at these 4 filter stages:

The 4 stages work together to create a pretty effective water protection unit, that comes second only to reverse osmosis. However, there are a few reasons to go with this over an RO unit:

1. It produces clean drinking water on demand.

2. It doesn’t waste any water in the filtration process.

3. It doesn’t use a bulky water storage tank.

The downside here is that 4 filters need replacing. This running cost must be considered. A year’s supply (5 filters) can be purchased in bulk, with the sediment filter needs to be changed every 6 months as opposed to yearly for the others. The actual filter change procedure is really easy and they just twist off and on.

What Else Should You Know about the iSpring CU-A4 4-Stage High Capacity Premium Under Sink Drinking Water System?

• No storage water tank required and no wastewater to worry about;
• It comes with a beautiful brushed nickel drinking water faucet;
• The Twist On / Twist Off filter cartridges makes the changing filters a breeze.

Bottom Line

This iSpring model is the most expensive under sink water filter on our recommendations’ list and it requires the most filter changes. However, it’s also the most refined and effective.

You May Also Be Interested in the iSpring US31 3-Stage Under Sink High Capacity Tankless Drinking Water Filtration System

3M Aqua-Pure 3MFF100

Rating: 4.3
Price: $$$
Key Features: Powerful filtration, easy filter changes, long-life filter, low maintenance

This is one of the most expensive picks on our best under the sink water filter reviews, but it is also one of the most effective.

The 3MFF100 is NSF Standard 42 and 53 certified to reduce contaminants such as chlorine, lead, cysts, and VOCs. The filter is actually rated at 0.2 microns. This means that it will remove all particles larger than 0.2 microns in size.

This filter rating is better than most whole house water filters, and most other methods of filtration. It is only topped by reverse osmosis water filters.

However, there are some reasons to choose this over a reverse osmosis system:

1. It doesn’t waste any water.
2. The filter lasts for 2 years.
3. It doesn’t remove healthy minerals from the water.

The filter is a combination of the pleated sub-micron filter and a carbon block. The carbon block is really effective at treating chlorine, and also improves the taste and odor of the water.

The filter media lasts for a massive 6,000 gallons or 2 years of use. The filter is then very easily replaced with the help of the built-in shut-off valve. This means you don’t have to shut-off and drain the whole water supply. The filter cartridges are easily twisted off to be replaced.

What Else Should You Know about the 3M Aqua-Pure Under Sink Full Flow Drinking Water Filter System?

• The installation of this under sink water filter does not require a separate faucet or any holes to be drilled into your countertop;
• The head assembly includes a built-in shut-off valve that allows for changing the SQC filters without shutting off the water supply;
• Tested to reduce sediment, chlorine taste and odor, cysts, lead, and select VOCs.

Bottom Line

We love this under sink water filter. It’s a really effective unit and very low maintenance. I would recommend this for city water supplies only. It might clog up quickly with dirty well water supplies. As far as effectiveness in reducing a wide range of water contaminants goes, this is one of the best under counter water filters.

CuZn UC-200 50K

Rating: 4.8
Price: $$
Key Features: Huge filter lifespan, 3-stage filtration, very low maintenance, great value

This system from CuZn Water Systems is unique because of how long the filter lasts. Many brands boast of long-lasting filters, but none match the enormous 50,000 gallons or 5 years of use that this system offers. Considering the cost of the unit, that’s quite a remarkable achievement.

The three-stage filter contains three different methods of water filtration to give a well-rounded performance. It’s able to target a wide range of contaminants because of this. Let’s take a closer look at how it filters the water.

The installation is really simple and takes a matter of minutes rather than hours. Once installed, the system is pretty much maintenance free for its life cycle. A bonus with this system, when compared to some other water filter systems, is that it doesn’t require a new faucet. It connects directly to the waterline.

Bottom Line: This system is really hard to beat for value. The filter lifespan is exceptional, and the 3-stage filter media is really effective too.

Nahla Pure

Rating: 4.5
Price: $
Key Features: Great value, effective at removing chlorine

This model from Nahla Pure is one of the cheaper systems that we have included.

It uses activated carbon media to provide a good level of chlorine filtration. The filter has really long lifespan of 3 years, which when combined with the fact that the unit is relatively cheap, makes this a really attractive purchase.

It is connected directly inline and therefore doesn’t require a new faucet. The fittings connect to the standard 3/8″ cold water line.

It is suited to city water only and treats chlorinated water.

It comes with a 100% satisfaction guarantee and is very well regarded by customers on sites like Amazon.

What Else Should You Know about the Nahla Pure Ultra High Capacity Premium Under Sink Water Filter?

• This under the sink wall mounted filter system frees space from your fridge and counter;
• Made in the U.S.A and great supporters of the Water School U.S.A. project;
• The Nahla Pure’s DC Sink Filter MAX removes 99.99% of all contaminants – volatile organic compounds (VOCs), chlorine, lead, and other heavy metals, bad odor, and taste.

Bottom Line

If you seek a low price solution to chlorine in your drinking water then you won’t do much better.

You May Also Be Interested in the Frizzlife Under Sink Water Filter System

Culligan US-EZ-1

Rating: 4.2
Price: $
Key Features: NSF certified, amazing value, great for chlorine reduction

This is the cheapest of the under-sink units that we have included in our top 6. But don’t be fooled into thinking it’s not an effective system, because it is.

The filter cartridge is carbon-based and therefore is particularly effective at removing chlorine. It is actually NSF certified to NSF/ANSI Standard 42 for chlorine reduction. The filter cartridge lasts for around 12 months, which is a really good return for such a well-priced unit. The cartridges themselves are also very competitively priced.

The filter changes are really easily done and are just a matter of twisting and pulling. There’s even a water shut-off valve included. It’s very easily installed too and comes with quick-connect fittings.

What Else Should You Know about the Culligan US 1 EZ-Change Under-Sink Drinking Water Filtration System?

• It is compatible with Culligan RC-EZ-1, RC-EZ-3, and RC-EZ-4 replacement cartridges;
• The quick-connect fittings with twist-on/off function make installation and maintenance a walk in the park;
• Two-year limited warranty.

Bottom Line

As you know, Culligan makes some of the best inline water filters on the market and also some of the best water softeners available today. This product does not fall far from the family tree either and few other under-sink water filters can beat this model on value and ease of installation.