In sink water filter: The Best Under-Sink Water Filter for 2023

Опубликовано: August 1, 2023 в 8:00 am

Автор:

Категории: Miscellaneous

The 9 Best Under-Sink Water Filters of 2023

These top picks improve water quality and taste

By

Erica Puisis

Erica Puisis

Erica Puisis writes about home products for The Spruce and specializes in interior design and plant care. She’s contributed to Forbes and smart home blogs like Smart Home Solver and TechDigg.

Learn more about The Spruce’s
Editorial Process

Updated on 04/13/23

Fact checked by

Emily Estep

Fact checked by
Emily Estep

Emily Estep is a plant biologist and journalist who has worked for a variety of online news and media outlets, writing about and editing topics including environmental science and houseplants.

Learn more about The Spruce’s
Editorial Process

We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.
Learn more.

The Spruce / David Hattan

Under-sink water filters are installed out of sight but provide advanced water filtration that improves the taste and quality of your water supply. A more eco-friendly option to bottled drinking water, these types of kitchen water filters can easily replace thousands of disposable plastic water bottles in the life span of a single filter cartridge.

Water quality is an important concern for homeowners, including those on municipal water sources or private wells. Rick Andrew, director of the National Sanitation Foundation’s Global Water Program, says: “Consumers on a public water supply should check their local water report that comes out annually to identify contaminants in their water that they may want to filter out of their tap.” Doing so will help you choose a filter that removes the contaminants present in your water supply specifically. He also suggests that homeowners who rely on a private well have their water tested annually by an accredited laboratory.

We researched the best under-sink water purifiers from the top brands, comparing options based on the type and number of filters included, the flow rate of the system, and ease of installation. We also looked for systems that have been independently tested to meet standards for water filtration systems established by the National Sanitation Foundation (NSF).

Our Top Picks

Best Overall:

Kraus Purita 2-Stage Under Sink Water Filtration System with Digital Display Monitor at Amazon

Best Budget:

Waterdrop 15UA Under Sink Water Filter System at Amazon

Best Splurge:

Brondell h3O+ Circle Reverse Osmosis Water Filtration System at Amazon

Best Reverse Osmosis:

APEC Water Systems ROES-50 Essence Reverse Osmosis System at Amazon

Best for Well Water:

Brondell Coral Water Filtration System at Amazon

Best Tankless:

Waterdrop Reverse Osmosis Drinking Water Filtration System at Amazon

Best for Alkaline Water:

iSpring 6-Stage Under Sink Reverse Osmosis System at Amazon

Best Customizable:

Hydroviv Under Sink Water Filter at Hydroviv.com

Best Compact:

Aquasana 2-Stage Under Sink Water Filter System at Amazon

In This Article

  • Our Picks

  • What to Look For

  • FAQ

  • Why Trust The Spruce

Amazon

View On Amazon
View On Wayfair
View On Home Depot

What We Like

  • Digital display for filter life and water quality

  • Meets NSF Standards 53, 401, 42, and 372

  • Two-stage filtration system

  • Six-month or 700-gallon filtration capacity

What We Don’t Like

When choosing an under-sink water filter, you want an option that is easy to install and performs well. The Kraus Purita 2-Stage Under Sink Water Filtration System checks both boxes. It also has a digital display to provide you with useful information, including readings on water quality, battery life, and filter status. Aside from being user-friendly, independent certification assures you that it’s an effective choice, too—making it our top recommendation for an under-sink water filter in most home kitchens.

The Kraus Purita is a two-stage water filtration system with a polypropylene filter and carbon block filter, so it’s designed to remove more contaminants than single-stage water filters. Specifically, it meets the following NSF standards: 53, 401, 42, and 372. Translating those standards into practical terms, this means that it filters out particles as small as 0.5 microns and reduces up to 98 percent of lead, while also filtering out volatile organic compounds (VOCs), chlorine odor, and some trace pharmaceuticals.

Everything needed to install this under-sink water filtration system is included. This system efficiently filters water for up to six months (or about 700 gallons of water) before it’s time to change the water filter. That equates to more than 5,000 individual 16.9-ounce water bottles, making the Kraus Purita both economical and eco-friendly. While the size of the filter cartridges isn’t beyond the norm, the cartridges are larger than what may fit in a very crowded or small sink cabinet. The whole setup is 9.5 inches wide and 15.5 inches tall.

The digital display monitor is a unique feature not found on all under-sink water filters. Aside from giving you at-a-glance information about water quality, the display emits an occasional beep to alert you to low (10 percent) remaining filter life. Instead of needing to play guess-and-check regarding filter replacement, this system lets you know when it’s time for a new filter to keep your water supply filtered and fresh.

Price at time of publish: $200

Dimensions: 15. 5 x 9.5 x 4.875 | Filter Type: Polypropylene, carbon block | Flow Rate: 0.75 GPM

Amazon

View On Amazon

What We Like

What We Don’t Like

A single-stage under-sink water filter system is an affordable way to improve water quality. For a budget choice, we recommend the Waterdrop 15UA Under-Sink Water Filter System. It has a twist-in cartridge with an impressively long filter life (up to 16,000 gallons), which stretches your cash because you won’t need to purchase replacement filters as often as filters with a more limited capacity.

It’s certified to meet NSF Standard 42, which addresses aesthetic water quality issues—like taste and odor from chlorine, as an example. It’s also been certified to meet or exceed NSF Standard 352, which assures you that the materials of the filter system don’t contain levels of lead deemed harmful for plumbing fixtures. And while the manufacturer claims that the system has also been independently tested to meet NSF Standard 53—which relates to the ability of the filter to remove more than 50 contaminants—it hasn’t been certified for this specific standard.

At less than $100, this option is about half the cost of more robust under-sink water filter systems. It doesn’t address as many water quality concerns as two-stage under-sink water filters, but you won’t drain your wallet to purchase this option or its filter cartridges, which only cost about $30.

Price at time of publish: $93

Dimensions: 3.6 x 3.6 x 16.7 inches | Filter Type: Polyester, activated carbon block, kinetic degradation fluxion (KDF) | Flow Rate: 0.75 GPM

 Amazon

View On Amazon
View On Wayfair
View On Home Depot

What We Like

  • Certified to meet NSF Standards 42, 53, 58, and 372

  • All-in-one unit with 6-liter storage tank

  • Countertop dispenser with LED indicator for filter life

What We Don’t Like

We recommend the Brondell h30+ Circle Reverse Osmosis Water Filtration System if you want a highly efficient under-sink system with advanced filtration capabilities. You’ll spend significantly more for this model than many other options, but it has four stages of filtration, a 6-liter storage tank, and includes a countertop faucet dispenser with an LED indicator light for filter life. As you’d expect of a high-end under-sink water filter, it is gold-seal certified by the Water Quality Association (WQA) to meet NSF standards 42, 53, 58, and 372.

The four stages of filtration include a sediment filter, pre-carbon filter, carbon block, and reverse osmosis membrane. The filters require replacement about every six months, with the exception of the reverse osmosis membrane filter, which lasts about two years. The filters are somewhat expensive to replace compared to the most affordable under-sink water filters; you can expect to spend about $80 every six months and about $90 for the reverse osmosis membrane when it’s due for a replacement. However, the filters offer excellent performance. They reduce many contaminants, but they especially stand out for reducing up to 98 percent of lead and chlorine, plus 84 percent of fluoride. The 6-liter tank within this reverse osmosis system refills in less than an hour, so you’ll have a steady supply of filtered water. 

The entire setup is contained in a single unit that gives this under-sink water filter a modern, finished feel worth the price tag. While the all-in-one design of this filter system is relatively compact, you should measure your space under your sink to make sure it has enough clearance around drain pipes or a garbage disposal. The list price for this one is upward of $740—but it’s frequently available at a steep discount, so if you’re not in a rush, it might be worth keeping an eye out for a sale.

Price at time of publish: $740

Dimensions: 16.5 x 9.25 x 13.8 inches | Filter Type: Carbon block, reverse osmosis membrane, sediment | Flow Rate: 0.4 GPM

Amazon

View On Amazon
View On Wayfair
View On Home Depot

What We Like

What We Don’t Like

One type of under-sink water filter that offers advanced filtration is a reverse osmosis system. According to Rick Andrew, these types of water filtration systems filter out dissolved ions and suspended particles in the water. The APEC Essence 5-Stage Reverse Osmosis system is a popular choice for households with more advanced water filtration needs. It has gold certification from the Water Quality Association, indicating that it meets NSF standards for drinking water treatment units.

The five stages of this reverse under-sink water filter are made up of a sediment filter, coconut shell carbon, and carbon block filter, along with a reverse osmosis membrane. Together, these filter stages capture contaminants that impact taste and health, like chlorine, VOCs, heavy metals, and nitrates. The system also reduces total dissolved solids (TDS) by up to 95 percent and fluoride by 93 percent, which is not a claim that can be made by most water filter systems without a reverse osmosis membrane.

While the APEC Essence 5-Stage Reverse Osmosis Under-Sink Water Filter is one of the best options because it’s easy to install and performs well, its shortcoming is a 3:1 waste water to clean water ratio. Other reverse osmosis systems have a 2:1 or 1:1 ratio that offers better efficiency and water conservation.

Price at time of publish: $199

Dimensions: 17.5 x 16 x 5.25 inches | Filter Type: Carbon block, coconut shell carbon, sediment | Flow Rate: 0.035 GPM

The Home Depot

View On Amazon
View On Wayfair
View On Home Depot

What We Like

  • Three-stage filtration removes up to 99 percent of lead

  • Includes countertop dispenser

  • Gold seal certified by WQA

  • Certified to meet NSF Standards 42, 53, and 372

What We Don’t Like

The Brondell Coral is a three-stage water filter that is ideal for well water or for anyone who prefers more advanced filtration compared to single-stage systems. This under-sink option includes a sediment filter to capture particles like dirt, sand, silt, or clay that may be present in well water sources. A pre-carbon filter and carbon block filter finish the filtration process, removing up to 99 percent of lead, along with dozens of other contaminants like asbestos, VOCs, and chloramines.

You don’t have to take Brondell’s claims at face value—the system has been certified to meet NSF Standards 42, 53, and 372. It also carries a gold seal from the Water Quality Association (WQA). You can expect to change the filters about every 12 months or once the system has filtered 600 gallons, which is slightly less capacity than the filter life of some other models. While it’s housed under the sink, the system includes a chrome faucet dispenser for countertop installation. The flow rate is 0.5 GP, which is lower than the 0.75 GPM flow rate offered by some other systems, but not low enough to be considered a serious flaw. Overall, this system gets plenty of positive praise for being easy to install and for improving the taste and quality of well water and municipal water.

Price at time of publish: $159

Dimensions: 9 x 13. 5 x 3.25 inches | Filter Type: Sediment, pre-carbon, carbon block | Flow Rate: 0.5 GPM

 Amazon

View On Amazon
View On Home Depot
View On Walmart

What We Like

  • Low wastewater production (1:1 ratio)

  • Removes up to 94 percent of TDS

  • Saves space by eliminating water storage tank

What We Don’t Like

For an under-sink water filtration system that is compact yet highly effective, consider a tankless reverse osmosis system. We recommend the Waterdrop G3 Tankless 8-Stage Under-Sink Reverse Osmosis option. Rather than using a water tank, it treats water on demand using three filters to provide eight layers of purification for removing common contaminants, including chlorine and heavy metals. (Each filter offers multiple layers of filtration.)

The reverse osmosis membrane lowers the amount of TDS in your water for drinking or cooking. Under-sink water filters that aren’t reverse osmosis systems won’t lower the level of TDS in your water, but this system is certified to remove up to 94 percent of TDS. Its claims are backed by independent testing that confirms it meets NSF standard 58 for reverse osmosis water filtration systems. If you want to know real-time TDS levels, the digital display on the included countertop faucet provides this information at glance, along with a visual indicator of the remaining filter life. Take note that the dispenser faucet is only available in nickel-plated chrome.

You won’t be left waiting at the tap for a glass of filtered water; the internal pump of this tankless model fills a glass in about 12 seconds. It can filter up to 400 gallons per day, and the composite filters last six to 12 months before needing replacement, a process made easier by the single-turn cartridges that require no tools or plumbing know-how. Water waste is a big concern with reverse osmosis under-sink water filtration systems, but this option offers a low 1:1 ratio of purified water to wastewater. 

Price at time of publish: $646

Dimensions: 17. 72 x 5.67 x 18.11 inches | Filter Type: Carbon block, polypropylene | Flow Rate: 0.28 GPM

 Amazon

View On Amazon
View On Wayfair
View On Home Depot

What We Like

  • Alkalinity filter to restore natural minerals

  • Pressurized storage tank holds purified water

  • Certified to meet NSF 58 standard

What We Don’t Like

While reverse osmosis is a common choice for an under-sink water filter, the filtration process removes beneficial minerals along with contaminants, producing water that is sometimes described as flat-tasting. Whether it’s for taste or health preferences, you can opt for a reverse osmosis system with an alkaline filter to add back in minerals naturally found in drinking water. If that’s what you’re after, we recommend the iSpring RCC7AK 6-Stage Reverse Osmosis System. It’s certified to meet NSF 58 standards and removes up to 98 percent of lead, along with fluoride, arsenic, asbestos, and chlorine.

This under-sink water filter sends water from your supply line through a series of pre-filters, a reverse osmosis membrane, and two final filter stages—including an alkaline filter that restores minerals like calcium, magnesium, sodium, and potassium ions. The result is purified water with an alkaline pH level of 7.5 or more, while standard reverse osmosis systems produce slightly acidic water with a pH of 7 or less. Water is held in a pressurized 2.5-gallon storage tank until you turn on the faucet. This means you may need to rethink your under-sink storage to make space for this larger water filtration setup.

While this system gets plenty of positive praise for the taste of water and the ease of use, it does have an unimpressive 1:3 clean water to wastewater ratio. Even still, it filters up to 75 gallons per day and makes a solid pick for an under-sink water filter that produces crisp, filtered water with demineralization.

Price at time of publish: $279

Dimensions: 14. 5 x 5.25 x 18.5 inches | Filter Type: Carbon block, polypropylene | Flow Rate: Not listed

Hydroviv

View On Hydroviv.com

What We Like

What We Don’t Like

Water quality can vary from one place to another, which is why it’s important to identify what contaminants you might need to remove from your water supply. Hydroviv doesn’t believe in a one-size-fits-all approach to water filtration and instead offers customizable water filtration filters.

Input your address and the team at Hydroviv uses publicly available water quality measurements along with the company’s own test databases to develop a custom water filtration system for your home that targets contaminants specific to your water supply. But rest assured that all Hydroviv filters meet or exceed NSF Standard 53 for lead removal.

The customizable under-sink water filter from Hydroviv is tailored to your home’s water filtration needs, but installs like most other options. It requires only simple screw-on connections to your water supply and setup can be completed in about 15 minutes. You can opt-in for auto-shipments of replacement filters at six-month intervals, which saves you 25 percent on the retail cost of a replacement filter. The filters are on the expensive side ($115 without the subscribe-and-save discount), so you may want to consider the savings you’ll get from subscribing to a filter replacement schedule, along with the assurance that your customizable water filter will remain functional and effective year-round.

Price at time of publish: $400

Dimensions: 14 x 6 x 6 inches | Filter Type: Varies | Flow Rate: Not listed

Amazon

View On Amazon
View On Home Depot
View On Walmart

What We Like

  • Certified to meet NSF Standards 42, 53, and 401

  • Can fit in small spaces

  • Captures 61 different contaminants

What We Don’t Like

Two-stage under-sink water filters offer additional reduction of particles and contaminants and address a wider range of water quality concerns than single-stage options. This option from Aquasana reduces 61 different contaminants, including chlorine (which affects taste), lead, and other heavy metals, plus PFOs and PFOAs. These claims are backed by independent testing to certify that the system meets NSF Standards 42, 53, and 401.

The entire system measures 9 x 8.25 x 4.25 inches, which means it can even fit in crowded cabinets. The filter housing easily twists apart so you can replace filter cartridges as needed, with no tools. You can expect the filters to treat about 500 gallons of water before needing replacement, which is short of the 600 to 700 gallons of filtration capacity that other under-sink water filters offer. Replacement cartridges run about $60 (for the set). Still, the system is efficient, effective, and easy to install. Pay close attention to the installation instructions and make sure the connections seal tightly; some leaking has been reported with this under-sink water filter system.

Price at time of publish: $116

Dimensions: 9 x 8. 25 x 4.25 inches | Filter Type: Carbon block | Flow Rate: 0.5 GPM

Final Verdict

Our top recommendation is the Kraus Purita 2-Stage Under Sink Water Filtration System because it meets several NSF standards and treats water using a polypropylene filter and carbon block filter. In addition, it has a digital display monitor to show you current information about water quality, filter status, and battery life. If you’re looking for more basic filtration and don’t need a digital display, consider installing the Waterdrop 15UA Under Sink Water Filter System. This single-stage water filter improves the odor and taste of municipal water and is certified to meet NSF Standard 42. As a budget pick, it’s worth noting that it also has long-lasting and inexpensive replacement cartridges.

Size 

When choosing the best under-sink water filter, you can’t ignore size and space limitations. The room available underneath your sink may determine how large of a system you can install. Single-stage or two-stage under-sink water purifiers are usually the most compact options, since they only have one to two filter cartridges. More stages of filtration usually add to the dimensions and weight of the system. As an example, the Aquasana 2-Stage Water Filtration System is only 9 inches high and 8.25 inches wide, but the iSpring RCC7AK 6-Stage Reverse Osmosis System requires much more space, as it measures 14.5 inches tall and 18.5 inches wide.

Filter Type 

There are a variety of filter types used in under-sink water filter systems, depending on the contaminants that are being targeted by the system. Some of the most common are carbon block, granulated activated carbon (GAC), polypropylene, and reverse osmosis membranes. Note that charcoal water filters have largely been replaced by carbon block or GAC filters, which are considered to offer better filtration capability. The best at-home water testing kits can offer some general insights into the quality of your water supply, but a professional lab will be able to give you a clear breakdown of the quanitity of contaminants in your water.

In addition to the type of filter, the number of filters can affect the quality of the sink filter. Single-stage systems will reduce fewer contaminants than multi-stage under-sink water purifiers. Options that include a reverse osmosis (RO) membrane usually remove a broader set of contaminants, including fluoride and TDS, which aren’t removed by non-RO under-sink water filters.

Filter Capacity 

Pay attention to filter capacity, since it indicates how often you can expect to replace the filter cartridge of your under-sink water filter. Filter life is usually estimated in months, gallons, or both. Most filters have a life expectancy of six months or 500 to 700 gallons. Once the filter reaches capacity, its performance declines significantly. You’ll need to replace the filters to ensure your water supply meets your quality expectations. Fortunately, most under-sink water filter systems have cartridges that twist off without the need for tools or excessive force, making this maintenance task fast and simple.

Flow Rate

To ensure that your filtered water is delivered quickly to your glass, check the flow rate for an under-sink water filter system. A typical flow rate is either 0.5 GPM or 0.75 GPM. Either one will fill a standard glass in just a handful of seconds, but if you frequently fill large water bottles or cooking pots, you may want to prioritize a higher flow rate for faster fill rates. An efficient flow rate of 0.75 GPM is one reason why we recommend the Kraus Purita as the best overall water filter for kitchen sinks.

FAQ

  • The advantage of an under-sink water filter is the fact that it treats water flowing from your kitchen sink, giving you filtered water for drinking, cooking, cleaning, watering plants, or any other purpose. Other types of kitchen water filters, like pitchers or countertop filtration systems, require refilling to maintain a supply of filtered water.

    Installation requirements are usually minimal for under-sink water filters and the filter life is typically between six months and a year. This makes them worth it to customers seeking a water filtration system that doesn’t need to be refilled frequently or one that requires frequent filter replacements.

  • How many contaminants a water filter can remove depends on its filter type. The highest-performing under-sink water filters typically use a combination of filters to target a wide spectrum of contaminants. As a rule of thumb, single-stage under-sink water filters that only meet NSF Standard 42 remove far fewer contaminants than systems that meet NSF Standard 53, which addresses 50 contaminants.

    “Ultimately, checking the certification to confirm that a filter system is certified to filter the contaminants of concern, regardless of technology used, is the best way to assure that a filter system will meet a consumer’s specific needs,” Andrew says. So look for a filter that has third-party certification to back up its claims. In addition, you can check the NSF Product Listing Page to find certified under-sink water filter systems.

  • The filter cartridges of an under-sink water purifier will eventually lose effectiveness due to accumulation of particles. How quickly this happens depends on the quality of incoming water, but most filters have a stated lifespan of about six months or 500 to 700 gallons of water treatment. The type of filter will also determine how long it lasts. A reverse osmosis membrane only requires replacement about every two years, but a carbon block filter typically needs to be replaced after about six months in most cases.

This article was written by Erica Puisis, a freelance home writer who has been contributing to The Spruce since 2017. Puisis has expertise in large and small appliances and has extensively researched water quality systems, including the best water softeners and best reverse osmosis systems. When researching the best under-sink water filters, she compared various types of filter systems. She evaluated the most popular models based on how many stages of filtration they offer, the flow rate of each system, filter maintenance, and storage tank considerations. All of our recommendations have been certified to meet at least one NSF standard pertaining to water filtration systems.

As part of the research process, Erica also interviewed Rick Andrew, director of the NSF Global Water Program. Rick spoke about the various types of water filters on the market and elaborated on the importance of choosing certified systems.

Under Sink Water Filters & Filtration Systems

Select where you want filter

Upgraded

Quick View

  • Out Of Stock

Optimh3O® Reverse Osmosis + Claryum®

5 out of 5 Customer Rating

Faucet Finish: Brushed Nickel

Combines Claryum® and reverse osmosis technology to remove 89 contaminants including fluoride and arsenic.

50% OFF REVERSE OSMOSIS SYSTEMS

Upgraded

Compare

Quick View

Claryum® 3-Stage Max Flow

4 out of 5 Customer Rating

Faucet Finish: Brushed Nickel

Remove up to 99% of 78 contaminants, plus sediment. Now with 44% faster water flow for ultimate hydration.

50% OFF 3-STAGE MAX FLOW SYSTEMS

Upgraded

Compare

Quick View

Claryum® 3-Stage

3.4 out of 5 Customer Rating

Faucet Finish: Brushed Nickel

Immediate access to clean, healthy water. 78 contaminants reduced, plus a Pre-Filter to tackle sediment and rust.

50% OFF 3-STAGE UNDER SINK SYSTEMS

Upgraded

Compare

Quick View

Claryum® 2-Stage

3.7 out of 5 Customer Rating

Faucet Finish: Brushed Nickel

Reduce 78 contaminants and instantly transform ordinary tap water into clean, extraordinary water.

50% OFF 2-STAGE UNDER SINK SYSTEMS

Patented Claryum® Technology = Healthy, Delicious Water

Our tested and certified Claryum® filtration removes the most contaminants while retaining naturally-occurring beneficial minerals to turn ordinary tap water into extraordinary water.

PEACE OF MIND

Ion exchange and sub-micron filtration tackle heavy metals like lead and mercury, along with asbestos and cysts.

OUT WITH TOXINS

Activated carbon removes pharmaceuticals, herbicides, pesticides, PFOA/PFAS, VOCs, and more.

WHOLE HEALTH

Catalytic carbon filters chlorine and chloramines from the water you drink and the air you breathe.

OPTIMAL HYDRATION

Selective filtration retains healthy minerals like calcium, magnesium, and potassium for purely delicious, filtered water.

See the full list of contaminants filtered

GOODBYE, CONTAMINANTS

NOTHING ADDED

BETTER PERFORMANCE & VALUE

ECO-FRIENDLY

EASY TO USE

Goodbye, Contaminants

Our under sink water filters are tested and certified to remove chlorine/chloramines, taste & odor, lead, cysts, pesticides, VOCs, and more for maximum protection for your family.

Nothing Added

With Aquasana, rest easy knowing that no chemicals are added to your water during the filtration process.

Better Performance & Value

Filter 15x more contaminants and get 20x more capacity than with the leading gravity pitcher filter.

Eco-Friendly

Designed with the environment in mind, our under sink water filters feature minimal disposable parts for reduced plastic waste.

Easy To Use

Our under sink water filters are engineered for straightforward installation and filter replacements, because clean water doesn’t have to be complicated.

Replacements

Replace your filters regularly to keep clean, healthy water flowing.

Under Sink Replacements

WATER FOR LIFE®

Replacement filters auto-delivered to you — for less.

No contract, 15% OFF filter replacement, an extended warranty, and free shipping. That’s Water for Life®.

Learn More

Aquasana — an immediate difference in every drop

Max Contaminant Removal

Industry-leading results for your peace of mind.

Nothing Added

No chemicals are added to your water during the filtration process.

The Reviews Are In

15,000+ five-star reviews from customers just like you.

You Talk, We Listen

Your feedback drives our product innovation.

Under Sink Water Filters for Healthy, Great-Tasting Water

Under sink water filtration systems are a popular way to get healthier, better-tasting water because they remove more contaminants than most pitcher-based options and even bottled water. These systems are installed below your sink, enabling you to instantly enjoy clean water straight from the tap without taking up valuable counter or fridge space. By connecting to your water line, under sink filters provide a constant supply of filtered water — so you don’t need to worry about refilling a tank or waiting for water to trickle through a filter block like with a traditional pitcher filter system.

Clean, healthy water is essential. After all, you use water for so much — from washing produce to watering plants to filling your family’s glasses (and Fido’s bowl!) at dinner. The majority of municipalities use chemicals such as chlorine and chloramines to treat drinking water for bacteria, but the process can miss other contaminants that may be detrimental to your health. This is why we recommend installing a water filtration system under your sink, on your countertop, or for your whole house.

Compared to most pitchers, Aquasana’s under sink water filters reduce 15x more contaminants. In fact, our tested and certified Claryum® filtration technology removes up to 99% of harmful contaminants including chlorine, chloramines, lead, microplastics, fluoride, PFAS, pesticides, herbicides, mercury, asbestos, and others from your tap water.

Choose the Best Under Sink Water Filtration System for Your Home

Aquasana offers several under sink water filters to fit the unique needs of your home and family, and many include a dedicated faucet that dispenses filtered water.

To help determine which under sink water filter is best for your home, start by reading your water quality report and consider what level of filtration you’ll need to reduce contaminants present in your water. Here’s an overview of our under sink water filters that are great at reducing contaminants and protecting you and your family’s health:

  • Optimh3O® Reverse Osmosis + Claryum®: Our most powerful under sink water filter, this system uses reverse osmosis to remove 89 contaminants (5x more than other RO systems)
  • Claryum® 2-Stage: Removes up to 99% of 78 contaminants including chlorine, lead, PFAS, and microplastics
  • Claryum® 3-Stage: Removes up to 99% of 78 contaminants and includes a pre-filter to tackle sediment and rust
  • Claryum® 3-Stage Max Flow: An upgraded version of the Claryum® 3-Stage, now featuring a 44% faster flow rate and 800 gallons of filter life
  • Claryum® Direct Connect: An easy to install, fast-flowing water filter that connects directly to your existing faucet and removes up to 99% of 78 harmful contaminants

All of our under sink water filters are tested and certified to reduce chlorine, chloramines, herbicides, pesticides, PFAS, pharmaceuticals and more in your tap water. If you prefer a countertop water filter, we have options that also use tested and certified Claryum® filtration technology proven to remove up to 99% of lead, asbestos, chlorine, chloramines, and more for a total of 78 harmful contaminants.

How to Install and Replace Our Under Sink Water Filters

Installing our under sink water filters is straightforward. Each Aquasana under sink water filtration system has its own detailed step-by-step installation instructions in addition to a video guide to help simplify the setup process.

Replacements are quick and easy, but will vary in frequency depending on use and the system purchased. For more information on how often to replace components within our under sink water filters, check out our under sink and countertop filter replacement page. If you have additional questions about our under sink water filtration systems, installation, replacement, or our products in general, please contact us for customer support.

Under Sink Water Filtration System FAQs

What does an under sink water filter do?

Under sink water filters are a type of water filtration system installed below a sink and improve water quality by removing contaminants like lead, mercury, chlorine, and others. By removing contaminants, homeowners can improve the taste, smell, appearance, and overall safety of tap water to make it healthier and more enjoyable to drink.

Are under sink water filters worth it?

Under sink water filters offer a great combination of performance and affordability. They’re a great choice for people who want to improve their water quality well beyond what’s offered by a pitcher filter, but without the high cost of a whole house system. Overall, their straightforward installation, high performance, and ease-of-use make under sink filters a great choice.

How long does an under sink water filter cartridge last?

The lifespan of an under sink water filter cartridge depends on the type and usage. Typically, under sink filters will need to be replaced every 6-12 months. However, some filters have a longer lifespan than others. Usage can also affect how long a filter lasts, and heavy usage may cause a filter to exceed its capacity before the recommended replacement time.

Filters for water purification with mineralizer AQUAPHOR

Moscow

  • home

  • Catalog

  • Wash water filters

  • org/ListItem”>

    Filters with a mineralizer

Water treatment type

Cleaning level
Reverse osmosis
Flow filter

Removes all major contaminants
Yes
Yes

bacteria
Yes
Yes

Viruses
Yes
Yes

White coating in the teapot
removes for 2 years / in liters
removes for 2–3 weeks / in liters

Mineralization
Yes
yes, on some models

Exploitation

Restoring the mitigation module resource
not required
when a white patch appears

Draining water into the drain during operation
drain and how much
not required

Clean water tank
needed
not needed

All types

All types

Reverse osmosis

Through-flow sorption

Special requirements

No requirements

Removes limescale

9000 2 Removes bacteria

Removes viruses

Needs mineralization

Suitable for children

all parameters
pick filter 2
reset
pick up filter

Selection

All types

Requires mineralization

reset
change

Sort

Popular first

Popular first

Inexpensive first

Discount

Aquaphor DWM-101S Morion

13 490 ₽

Savings 1 410 ₽

13 490 ₽

14 900 ₽

Aquaphor DWM-202S

31 250 ₽

31 250 ₽

Discount

Aquaphor Osmo Pro 50

8 490 ₽

Savings 3 360 ₽

8 490 ₽

11 850 ₽

Aquaphor Osmo Pro 100

12 350 ₽

12 350 ₽

Discount

Aquaphor DWM-102S Pro

14 900 ₽

Savings 3,000 ₽

14,900 ₽

17,900 ₽

All filters are removed

  • rust

  • Heavy metals

  • Chlorine

  • Turbidity and suspension

  • Brown sediment

  • Pesticides

what to do if there are too many impurities

Aquaphor DWM-312S Pro

9 350 ₽

9 350 ₽

Aquaphor DWM-70S

11 500 ₽

11 500 ₽

AQUAPHOR DWM-202S Pro

35 490 ₽

35 490 ₽

Aquaphor Osmo 50 isp. 5

12 350 ₽

Aquaphor Osmo-Crystal 100 isp. 4M

12 990 ₽

Quick selection by parameters

Under sink

Reverse osmosis

For hard water

Chlorine cleaning

Filter with mineralizer

From rusty water

iron removal

From bacteria

For children

Flow filters

household

With storage tank

single stage

two stage

Three-stage

Four-stage

Five-speed

For coffee machines

Without storage tank

Which filters contain a mineralizer?

The only type of water treatment system that requires a mineralizer is a reverse osmosis filter. The fact is that in the process of filtration from the water, along with pollutants, “positive heroes” – minerals – are also removed.

Recommendations for choosing a filter with a mineralizer

AQUAPHOR’s DWM-series are the most compact and efficient reverse osmosis filters with a mineralizer, which surpass standard reverse osmosis filters in a number of characteristics. Installing such a system in the kitchen will save you from problems with scale, foreign tastes in drinking water and almost any common contaminants. At the same time, it will help to significantly save the budget on the purchase and delivery of bottles.

564-291

Application for video consultation

1

messenger for communication

2

contact details

3

date selection

Choose a communication method 9000 3
* To go to the next item, select the communication method and click the “next” button
Further

Application sent

Our employee will conduct a video consultation at the selected time

Rust filters

Moscow

    org/BreadcrumbList”>

  • home

  • Catalog

  • Wash water filters

  • org/ListItem”>

    Rust filters

Water treatment type

Cleaning level
Reverse osmosis
Flow filter

Removes all major contaminants
Yes
Yes

bacteria
Yes
Yes

Viruses
Yes
Yes

White coating in the teapot
removes for 2 years / in liters
removes for 2–3 weeks / in liters

Mineralization
Yes
yes, on some models

Exploitation

Restoring the mitigation module resource
not required
when a white patch appears

Draining water into the drain during operation
drain and how much
not required

Clean water tank
needed
not needed

All types

All types

Reverse osmosis

Through-flow sorption

Special requirements

No requirements

Removes limescale

9000 2 Removes bacteria

Removes viruses

Needs mineralization

Suitable for children

all parameters
pick filter 2
reset
pick up filter

Selection

All types

Rust protection

reset
change

Sort

Popular first

Popular first

Inexpensive first

Discount

Aquaphor DWM-101S Morion

13 490 ₽

Savings 1 410 ₽

13 490 ₽

14 900 ₽

Aquaphor DWM-202S

31 250 ₽

31 250 ₽

AQUAPHOR Baby Pro

6 690 ₽

6 690 ₽

Discount

Aquaphor Osmo Pro 50

8 490 ₽

Savings 3 360 ₽

8 490 ₽

11 850 ₽

AQUAPHOR Baby H Pro

6 790 ₽

6 790 ₽

All filters are removed

  • rust

  • Heavy metals

  • Chlorine

  • Turbidity and suspension

  • Brown sediment

  • Pesticides

what to do if there are too many impurities

Aquaphor Osmo Pro 100

12 350 ₽

12 350 ₽

Discount

Aquaphor DWM-102S Pro

14 900 ₽

Savings 3,000 ₽

14,900 ₽

17,900 ₽

Discount

Aquaphor ECO Pro

5 690 ₽

Savings 3 060 ₽

5 690 ₽

8 750 ₽

Discount

Aquaphor ECO N Pro

5 790 ₽

Savings 3 060 ₽

5 790 ₽

8 850 ₽

Aquaphor Favorit IVF

10 590 ₽

10 590 ₽

Aquaphor DWM-312S Pro

9 350 ₽

9 350 ₽

Aquaphor Crystal Eco

7 750 ₽

Aquaphor DWM-70S

11 500 ₽

11 500 ₽

AQUAPHOR DWM-202S Pro

35 490 ₽

35 490 ₽

Discount

Aquaphor Crystal A for hard water

2 990 ₽

Savings 2 000 ₽

2 990 ₽

4 990 ₽

Aquaphor Crystal

5 190 ₽

5 190 ₽

Discount

Aquaphor Favorite

6 990 ₽

Savings 2 600 ₽

6 990 ₽

9 590 ₽

Discount

Aquaphor Crystal A

2 890 ₽

Savings 2 000 ₽

2 890 ₽

4 890 ₽

Aquaphor Crystal N

5 290 ₽

5 290 ₽

Aquaphor Trio Norma

4 890 ₽

4 890 ₽

Discount

Aquaphor Trio Fe

3 590 ₽

Savings 1 800 ₽

3 590 ₽

5 390 ₽

Aquaphor Osmo 50 isp. 5

12 350 ₽

Aquaphor Trio Norma Softening

4 990 ₽

4 990 ₽

Discount

Aquaphor Trio Fe H

3 690 ₽

Savings 1 800 ₽

3 690 ₽

5 490 ₽

Aquaphor Osmo-Crystal 100 isp. 4M

12 990 ₽

Discount

AQUAPHOR Viking 300 for drinking water

14 990 ₽

Savings 4,000 ₽

14,990 ₽

18,990 ₽

Discount

Aquaphor Viking Midi 300 for drinking water

12 790 ₽

Savings 3,000 ₽

12,790 ₽

15,790 ₽

Quick selection by parameters

Under sink

Reverse osmosis

For hard water

Chlorine cleaning

Filter with mineralizer

From rusty water

iron removal

From bacteria

For children

Flow filters

household

With storage tank

single stage

two stage

Three-stage

Four-stage

Five-speed

For coffee machines

Without storage tank

Large rust particles from old water pipes

Rust is oxidized iron particles. They are visible to the naked eye and at high concentrations give the water a yellowish, reddish or even brown tint. Most often, rust appears in water due to aging (corrosion) of metal pipes or after repair of water supply networks.

Dissolved iron

Water with excess dissolved iron looks clear, but after a while it turns yellow, and then a brown precipitate appears due to the iron oxidizing in air. Despite the benefits of iron, which is found in apples, seafood and other foods, its high concentration in dissolved form is dangerous. The maximum permissible concentration in tap water according to SanPiN is 0.3 mg / l.

2. Anti-rust filter for families with children

In-line filters with hollow fiber membrane – an alternative to reverse osmosis filters. They remove rust and up to 50% colloidal iron. At the same time, they will protect you from bacteria and most impurities in tap water. You can drink purified water without boiling and cook baby food on it.