Best Under Sink Water Filters

A good way to purify water in your house is to use an under sink water filter, so that you can get clean, pure water easily. Under sink water filtration systems are very popular thanks to their good water flow, filtration abilities and that they don’t occupy your countertop space. Once you have installed an under sink water filter, you don’t need to buy bottled water to drink. In the long run, this can save much more money for you and you also can be friendly to our environment. Under sink water filters actually involves a multi-stage filtration process, so different types of contaminants and pollutants can be reduced or removed, resulting in high quality and good smell and taste water.

Best Under Sink Water Filter

On the market, there are many under sink water filters that are different stages, filtration abilities, prices and ratings. And we have done a lot of research and comparison to make this list of best under sink water filters. You can read our under sink water filter reviews before making a buying decision. And they are worth having because of their top quality and performance.


New Wave Enviro 10 Stage Water Filter System

best under sink water filterAnother best under sink water filters we highly recommend is this New Wave Enviro, because it features a 10-stage water filtration process. It is a countertop water filter but you can use it as a under sink model with a conversion kit. With this conversion kit,it can be installed under the sink. This 10-stage water filter can provide you good tasting water. It can remove or reduce most of contaminants in our water, like chlorine, heavy metals, bad odors, asbestos, hydrogen sulfide, microorganisms, herbicides, pesticides, etc. In a word, it can make the major contaminants below minimum levels of EPA. The capacity of this countertop water filter can be up to 1500 gallons.

Filtrete Advanced Undersink Water Filtration System, Easy to Install (3US-PS01)

filtrete-advanced-undersink-filtration-3us-ps01The Filtrete 3US-SP01 is one of the most popular and top rated under sink water filter on the market. Due to its perfect performance and good filtration abilities, it is rated highly and many customers left their reviews. You also can read these reviews to learn more about it.

This filter can improve your water smell and taste by reducing chlorine in your water. Sediment, rust, soil and sand can be removed. What’s more, it even can capture airborne allergens by using its electrostatically charged filter media. This design is cool. The installation is pretty easy and you can finish it within 30 minutes. The tools you need are a screwdriver and a wrench. That’s all. Generally, this filter doesn’t need to be changed within 6 months. However, if you need more water to use every day, you need to change its filter frequently.

Culligan US-EZ-4 EZ-Change Level-4 Under-Sink Drinking Water System

culligan-us-ez-4-ez-change-under-sink-drinkingThis Culligan water filter can reduce chlorine, bad odors, particulates, lead, sediment, cysts, as well as VOCs. Thanks to its twist-on/off mechanism, the installation becomes very easy. It also comes with all the tools needed for installation. Plus, it also comes with a lead-free faucet. However, the capacity is only 500 gallons and the price is very low. Therefore, if you need an affordable model, this one will be a good choice. And it is also NSF certified.

Watts Premier 531130 Filter-Pure UF-3 3-Stage Water Filtration System

watts-premier-filter-pure-3-stage-filtrationThis filter is a 3-stage water filter and it is NSF certified. Thanks to its 3 stages of filtration process, it can reduce a wide range of contaminants, including chlorine, chemicals, herbicides, sediment, pesticides, as well as VOCs(volatile organic chemicals). Due to its push-button assembly, the installation is pretty easy and quick. For installation, it comes with all the tools you need. Plus, it also comes with a brushed nickel faucet, so you don’t buy an extra faucet. The replacement is also very easy because of its valve-in-head design. You can change its filters without turning off your water sources. This design is very convenient.


Aquasana AQ-5300.55 3-Stage Under Counter Water Filter System with Brushed Nickel Faucet

aquasana-aq-5300-55-3-stage-counter-brushedThis under sink water filter is a 3-stage water filter and uses NSF certified Claryum technology. And this system is able to remove over 97% of chlorine in our tap water. It also can remove cysts, lead, mercury, asbestos and giardia, pesticides and herbicides, and VOCs. The water flow rate is also good. It also includes a metal faucet which you don’t need to buy separately. Once you have installed, you can have clean water to drink in no time.

CRYSTAL QUEST Mega Undersink Replaceable Double Fluoride Water Filter System

crystal-undersink-replaceable-double-fluorideThis water filter is especially designed to remove fluoride. However, it also can remove other types of contaminants. This is a 7-stage water filter. It can remove fluoride, arsenic, lead, etc. Therefore, it can offer you clean water to drink.

Best under Sink Water Filter System Buying Guide


  • Not occupy your countertop space
  • A good water flow
  • The multi-stage filtration process can remove many types of contaminants
  • Have a longer life span than faucet filters or countertop water filters
  • Offer you good tasting water
  • Almost no waste water produced


  • A little complicated installation in contrast to faucet or countertop filters, so you may ask a professional for help.
  • More expensive

If you have arrived at this article, there is a great chance that you have identified the under sink filter as your preferred water filtration system. They are not only space-saving, but also very efficient and easy to install. But, there are a few buying factors to consider, such as the capacity, the brand, and other issues that separate the different models.

Here are a few of the different factors:


The most important issue relates to the ability to remove contaminants from water. For this reason, it is critical to check a particular unit is able to eliminate the most common water contaminants. Look for the system that is effective at removing pesticides, heavy metals, organic compounds, lead, fluoride and chlorine. Also, a carbon filter is useful to remove the odor from the water. The most desirable units are the multi-stage filtration systems. However, the 5-7 stage units are the most expensive.

Flow rate

The flow rate can vary with the under sink filters and not every model offers the fastest delivery times. A top-rated under sink unit can provide up to 5 liters per minute, while the less efficient can be limited to a liter or less. The water flow rate is a key point to check in the buying process.


The size of the unit shouldn’t be too much of a concern provided it easily fits under the kitchen sink. However, the design of the water filter can vary significantly. A water filter may come packaged with a tap to extract the water, while others require this to be purchased separately. It is usually necessary to create a hole for the faucet during the installation process. Other factors include the aesthetics. It may benefit to look at the filtration systems that have the right feel and look.


Costs relate to the initial installation and on-going maintenance. Most of the high-quality filters are built with self installation in mind and completed in less than an hour. Most have only a few connections to get the filtration system up and running. The maintenance cost is likely to relate to replace cartridges. The filters should be easy to source. This type of filtration system should be cost-effective in relation to both the initial purchase price and future maintenance needs.


Without the right guidance there is the possibility of picking up the unreliable or low-quality unit, especially if shopping online. So, make sure to look for the water filtration system marked with NSF, which gives the assurance of a reliable unit. Alternatively, buy the water filter from a respected brand. This has the added benefit of including great technical support and customer service.

A part of the installation process is connecting the under sink water filtration system to the cold water pipe. Also, this may also include installing a dedicated faucet for the water, or even use the existing sink set up.


  • Great countertop space design
  • Fast and reliable water flow
  • Multi-stage filters are the most effective
  • The life span of the filters is longer compared to the countertop and faucet type
  • Provides clean and crisp tasting water
  • Minimal water wastage


  • Professional installation required for certain models
  • High price tag compared to countertop and faucet filters

The Bottom Line

When it comes to choosing the best under sink water filter, you should know what you really want. This means you need to consider your under sink space, your budget and the degree of filtration you want. If you plan to choose one, we highly recommend to choose the above models according to your requirements. This is because they were chosen based on their high ratings, high quality and customer reviews.

Leave a Reply

Your email address will not be published. Required fields are marked *