Best Inline Water Filter 2022 – (Ultimate Buyer’s Guide)

The most valuable resource on the planet is clean drinking water. However, not all water supplies reach our homes without contaminants and sediment. An inline water filter will allow you to rest easy at night knowing you have pure and clean water.

A whole-house filtration system is not affordable for everyone.

In this case, installing an inline water filter can be a great option to clean your water. The technology surrounding filters has advanced tremendously over the past decade and consumers are now reaping the rewards.

With so many options on the market, you may feel overwhelmed which inline water filter to choose.

Luckily, I’ve invested my time and money to test the best filters and I’m about to share my insights with you in this guide!

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Installing an inline filter in your main water supply or sink takes only a few minutes and costs around $50-100.

This small investment can pay off thousands of times over with a filter life expectancy of around 4-6 months. You can rest assured that your drinking water is clean and free from contaminants.

My guide to the best inline filters will help you choose the right one for your situation.

Keep reading to choose the right inline water filter for you, no matter if you live in a city with hard water or high levels of chlorine.

Page Contents

The Best Inline Water Filter for Ice Maker – EcoPure EPINL30 5

The EcoPure inline water filter is for refrigerators and icemakers. It’s probably the best inline refrigerator water filter out there. It has a 5-year lifespan. Compatible with most refrigerator brands including Samsung, LG, Frigidaire and Whirlpool.

It comes with a 1/4-inch compression and quick connect fittings to make it easy to install on multiple water lines. The EcoPure was designed and manufactured in the USA. It is made of BPA-free materials so that your water won’t be affected by the filtration process.

The EcoPure can be installed in your refrigerator or icemaker in your house, boat, or RV. It will reduce the chlorine taste and odor and sediment. The EcoPure is easy to install and comes with all the necessary tools.

The EcoPure has been tested and certified to NSF Standard 42 chlorine removal. This is an important bonus for anyone looking for an inline water filter that works. Although the EcoPure is effective at removing chlorine, it doesn’t remove all contaminants.

What I Like
  • NSF certified
  • 5-year lifespan
What I Don’t Like
  • It doesn’t remove a wide range of contaminants
  • Customers had problems with leaking.

So, if you need the best inline water filter for refrigerator, go for EcoPure.

Culligan RC4 EZ – Amazing Quality, Great Water Taste

Culligan was my only water company when I was a child. Culligan has a variety of trusted products. The inline water filter is no exception. This 500-gallon filter will provide clean, purified water for your family for many months.

This filter cartridge can be attached to any Culligan water treatment system. It is certified to reduce or eliminate a ton. This filter can remove nearly every contaminant known to cause odors or be harmful to your health.

The adapters of the Culligan filter can be used with any size water supply tubing. Culligan should be proud to endorse this inline filter, as it immediately improves water taste and odor.

What I Like
  • Once installed, there is no need to maintain this filter.
  • Affordable filter price
  • The #4 filter removes more than 99.9% of contaminants from your water supply.
  • The water taste was better after the filter was installed.
What I Don’t Like
  • This applies only to those who have the Culligan RC-4 installed.

iSpring FA15 10-inch Inline QuickConnect Replacement

One problem with most filtration systems is that they also filter out the good stuff. Fluoride and other natural elements are good for you, provided they are at the right levels.

The iSpring model replaces the minerals and inserts them into your water supply with the alkaline filter. This unit is very affordable at $$. When testing water filters, pH levels are an important measurement. The iSpring system is an impressive inline pH balancing filter.

Combining the iSpring RO and this inline filter will provide clean, purified water for your entire family for months. Although it claims to raise pH by 0.5 to 1.2, our testing revealed that the results were far superior.

What I Like
  • For easy filter replacement, push-fit quick connection.
  • The alkaline filter supplies natural calcium, magnesium and sodium ions.
  • Installation was made easy by the Quick-Connect fittings.
  • It can raise pH levels above 10 by adding it to an RO system.
  • Notable reduction in odor after well water testing.
What I Don’t Like
  • There were no instructions and the installation was not straightforward.

GE Replacement Water Filter For Inline Systems

GE is a leader in appliance technology. The same engineers also make the filters for their appliances, ensuring high quality. Combining these filters with GE water systems is a smart decision for every household. They have a long life expectancy. It doesn’t matter what water quality you have.

You can always improve it. This premium filter reduces lead and other harmful chemicals. Chlorine is one of the most common complaints about water. Chlorine can cause skin irritation and can also taste terrible. Fortunately, the GE filter can remove this problem quickly.

These twist and lock filters are the easiest to install. Even for those with limited skills, they are simple to change. The GE filter is a great choice for anyone who wants to have better water.

What I Like
  • This method removes thousands of impurities, including BPA and lead, mercury, as well as chlorine.
  • The easiest filter to install that I have ever tested.
  • The water was immediately freed from any chemical taste.
  • After installation, any odors in the water were eliminated.
  • Multiple levels of testing have been approved by NSF.
What I Don’t Like
  • It can only be used with four GE model filtration system models.

Watts Inline Water Filter, 20,000 Gallon Capacity

Watts has been in the water industry for more than 130 years. Their inline water filter is a testament to that. You can connect the inline water filter to any water supply and install them anywhere you want.

This inline filter costs just $$ and is very affordable. The Watts inline filter can be used to clean your fridge and RV water while you are at the campsite.

The filter’s 20,000-gallon capacity is certified for bacteriostatic characteristics, which means that the filter will last longer. You can easily change filters and they are very affordable so you don’t go without water for too long.

What I Like
  • Uses in refrigerators, icemakers and RVs. Also works well with boats, water fountains, water coolers and other water-related equipment.
  • A notable improvement in the taste and odor of chlorine.
  • It will decrease limescale buildup in all appliances that it is connected to.
  • Water and ice are crystal clearer.
  • It is easy to connect adapters with existing plumbing.
What I Don’t Like
  • It will not work with any other type of piping that is less than 1/4 inch.
  • Leakage can be easier with plastic construction.

Amazon Basics Inline Filter for Water

AmazonBasics has provided us with a lot of high-quality consumer products that are simple and efficient. The inline water filter was no exception. It also had the most simple installation process.

This model is a smaller inline filter that can remove a lot of water contaminants, including chlorine, sediment, aluminum and cadmium. These are essential when filtering water.

The AmazonBasic inline filter is a great option for rural areas and well-water supplies that are high in metal.

What I Like
  • During testing, both the faucet and the hose can be quickly connected.
  • A 20-micron filter removes metals and sediments.
  • Any water odors were eliminated upon installation.
  • The value of the product was unmatched, priced at approximately $$
  • The standard 1-year warranty is provided by the supplier.
What I Don’t Like
  • It is difficult to determine the filter life information. You will need to test water

Filtrete Advanced Under-Sink Inline Filtration System

3M is an industrial giant that everyone knows. This under-sink model makes it easy to transform hard water from your faucet into clean, fresh drinking water.

Although the filter’s advertised life expectancy is 6 months, it can withstand 2,000 gallons. However, I love the reminders that remind me to change my filter. There are two ways to remind you to change your filter.

You can check the date on the stickers so that you can see under your sink where it is located and verify when it was replaced. A text message reminder system is another option that 3M has created.

All of these features are combined with the fact the 3M inline filters do their job. It reduces chlorine and odors that can be caused by hard water.

This model is great for anyone who wants to lower the levels of lead or other heavy metals in their supply of water. The 3M model is an excellent choice because of its great features and easy installation.

What I Like
  • Install quickly into your existing tap water system.
  • It is easy to replace your filter.
  • There are three types of filters: Maximum, Advanced, and Standard.
  • This inline filter reduces lead up to 99.3%
  • The flow rate was not reduced, and it remained constant at 2.25 GPM.
What I Don’t Like
  • The maximum temperature at which the device can operate is 100 degrees F (F).

Lasco 37-1821 Icemaker Inline Filter

This Lasco inline water filter is a great example of the phrase “Big Things Come In Small Packages”. This inline filter is small at just 10 inches by 2 inches. It can be placed almost anywhere.

It was originally designed to be used on refrigerators to provide clean, odorless ice. However, it can be placed in any water line that is less than 1/2 inch. This inline filter is small enough to be a great fit for campers and RV owners. Living in one of these vehicles is an experience of luxury.

A full-sized water filtration system is not something you want taking up half of your living space. With its small size, it will be easy to install into any water line in your RV/camper. The simplicity of this inline filter is what I liked about it.

It is very simple to install. Even though the filter is simple and made from coconut shell, it does a good job of filtering out hard water particles.

It is small and easy to use, which I can’t emphasize enough.

What I Like
  • Easy to install, it connects to your water pipes directly and then to your water line.
  • Ice was clearer and cleaner.
  • After installation, sulfur and chlorine smells were significantly better.
  • It is small-sized and can be installed anywhere you need it.
  • Coconut shell is extremely durable and can be used in the best inline water filter systems.
What I Don’t Like
  • It is not compatible with other sizes of pipe threads

Omnipure K2533JJ Inline Water Filter

We get a lot of complaints about icemakers. Ice comes out cloudy and tastes terrible. The Omnipure has your back!

This inline filter is small and compact, designed to accomplish big things in a small package. It will improve the clarity and flavor of your ice cubes.

This Omnipure is a great ice maker if you have an ice maker on your fridge. You will also see major benefits if you have an icemaker in your refrigerator.

The Omnipure system’s size is another benefit. Because it is only 10-inches in length and 2-inches in width, it can work well in tight spaces.

This inline filter is ideal for campers, RVs, and mobile homes. The filter’s life span is long enough to save money, and the filter costs less than $$.

What I Like
  • Installation was easy with quick connect fittings
  • Its small size makes it easy to move it in tight places.
  • The installation had a significantly lower odor and chlorine taste than it did before.
  • It can be connected to any 1/4-inch fitting, making it extremely versatile.
  • The filter comes pre-washed so it doesn’t need to be “broken in”.
What I Don’t Like
  • The maximum operating temperature is 100 degrees F (F.).
  • The water flow rate was reduced when I used the faucet.

The Most Important Things When Buying an Inline Water Filter

We are aware that there is a lot being presented to you right now. It can be difficult to choose the right inline water filter. Some require pre-installation, while others can be used with an existing water supply.

We consult with customers around the globe so we can help you choose the best inline filter or point you in the right direction.

When choosing an inline water filter, there are many things to consider. These are the steps to follow and some key facts to consider before making a decision.

What Is an Inline Water Filter?

Inline water filters are thin, long filter cartridges that connect up to your home’s waterline. These filters are space-saving and easy to install. They can be placed anywhere along your waterline, from the point of entry (POE) to the space below your kitchen sink.

Water Use and Filter Life

One thing that we have always looked at when evaluating inline filters is their life expectancy. One of my most frequent questions is “How many gallons can I run through the filter before it needs to be replaced?”

This is a great question. Most filters have an expected lifetime or a general timeframe for when they should be changed. It will differ from person to person depending on how hard or how much they drink. The fact is that your filter’s life span is determined solely by how much water it receives.

Your usage will be lower if you have a smaller family or even a couple. The less you use the filter, the longer it will last. It is important to know how much water the filter can withstand before it needs to be replaced. The filter you are considering may only state “6 Month Filter Live”, but that is not the truth.

I advise people to always have an extra water test kit in case they need it. This will allow you to check the water and determine when the filter is not working properly.

Inline water filters are thin, long filter cartridges that connect up to your home’s waterline. These filters are space-saving and easy to install. They can be placed anywhere along your waterline, from the point of entry (POE) to the space below your kitchen sink.

What Is the Secret to Their Success?

Inline water filters make use of the pressure from your plumbing to force water through a filter, or series of filters that trap contaminants.

If you turn on your cold water faucet or press the water button to get water from your fridge/ice maker, the water will pass through an inline filter and arrive at your refrigerator, icemaker, or faucet as filtered.

From start to finish, this will only take a few seconds.

Most inline water filters use carbon-based technology. They use adsorption, which traps impurities and prevents them from contaminating water or ice.

Adsorption is the process of binding water molecules to solids, in this case, the micropores in the filter. These contaminants stick to the filter, and cannot pass through with smaller water molecules.

What Are the Best Times to Use an Inline Filter?

If you’re looking for an easy and convenient way to filter your water, an inline water filter will be the best choice.

An inline water filter has the advantage that you do not need to replace it once it is installed. In some cases, the filter can last up to five years. You can have clean water and not worry about changing filters or cleaning the system.

High-contaminant water drinking water is best treated with inline water filters.

However, the removal of contaminants varies from one system to another. The best inline water filter systems do a fantastic job filtering chlorine taste and odor. Many of them are NSF certified for chlorine removal so they are a great choice if your water contains high levels of chlorine.

Tip: If you aren’t sure what contaminants your water contains, you can order a test kit to determine if you need a filter.

A water line filter can be connected to your water supply to make it more efficient. This filter is useful for those who don’t have fridge filters and still want to drink tasty and clean tap water cooled in a fridge.

Although you may see the best inline water filter that is meant for use with an icemaker, it is rare to find one that can be used for that purpose.

The filters can be connected to your water line and most homes have the same gauge. You can connect your filter to your water line to use it for any purpose you like – your fridge, freezer, fridge and icemaker, or faucet.

Types of Inline Filters

The exterior appearance of inline water filters is similar. They are cylindrical and long and have fittings on both sides to connect to your water supply. Different line water filters have their own filter materials inside the housing. These are the most popular types of filters used in best inline water filter systems:

Activated Carbon

Most activated carbon filters are used in water filters that are inline. An activated carbon filter uses the process of adsorption in order to trap contaminants within its filter media. This filter is particularly effective in removing chlorine taste from water.


Charcoal filters, which are another type of activated charcoal media, use the same adsorption process as activated carbon media to purify water. The activated charcoal is used to bind the contaminants to the media during adsorption. This prevents them from passing through the system with water.

Carbon Block

Another filter that is similar in sound and performance for inline filtration systems, the activated carbon block filters. Carbon block filters are made from compressed activated charcoal that has been ground finer than granulated activated. This prevents the formation of flow channels and provides a more efficient filtration.

Advantages and Disadvantages Inline Filters

An inline water filter offers many key benefits. They definitely improve the drinking water quality and its taste.

Multiple Appliances Can Filter Water

You may be able to use the same inline water filter on multiple appliances depending on which brand you choose and where you place it. You can use many inline water filters for your refrigerator’s water, ice maker, and kitchen tap. You can also use the filter to filter water from one appliance, such as your refrigerator or tap water.

Option Affordable

Inline filters are the most affordable water filter option when compared to other water filtration systems. Line water filters can be a great option if you are looking for a long-lasting, affordable water filtration solution for your fridge, tap water or ice maker.

It Is Easy to Install

The best products have easy-to-install fittings that make it simple to attach the filter to the supply. You don’t need to hire a plumber to help you install the filter, even if you aren’t a DIY enthusiast.

Low Maintenance

Inline water filters are more durable than other water filtration systems that require regular filter changes and weekly cleaning. They can be left alone for many months with no maintenance. Line water filters last at least six months so you don’t have to replace them as often as other filters.

Water Filtration by Discreet

The best inline water filter can be installed in a cupboard or another discrete location. It will filter the water for your fridge and ice maker. You don’t need to display your inline water filter like countertop filters. It’s small enough that it can be installed out of sight.

Drawbacks of an In-Line Water Filter

Installation Is Not for Everyone

Although inline water filters are made to be as simple as possible to install, it is still a difficult task that requires plumbing knowledge to complete successfully.

It’s Not a Complete Home Solution

Even the most powerful line water filters can’t filter water for your entire home. An inline water filter can only be installed in your refrigerator, icemaker, or kitchen sink. The filtration system won’t be powerful enough to supply clean water for all of your home’s appliances.

It Doesn’t Provide the Most Comprehensive Contaminant Removal

Although they are useful for chlorine reduction only, some inline water filters can remove heavy metals. An inline water filter won’t provide you with complete contaminant removal.

There Are Some Things to Consider When Buying an Inline Water Filter

Eliminating Contaminants

An in-line water filter can almost guarantee that your water will be free from chlorine taste or odor. Many filters are NSF certified to prove this. They can also remove sediment, dirt, and sand from your water. This will help to keep your fridge’s icemaker in tip-top condition.

Inline water filters can remove bacteria and microorganisms. Some also remove trace metals such as lead. Although many people who have line water filters claim they no longer have hard water due to using them, it is rare for an inline water filter to be able to soften the water. This would require a completely different process for water conditioning.

Flow Rate

The flow rate of water through an inline water filter system can be a problem because it is connected to the main water line. It is important to have immediate access to your ice maker or your water faucet without waiting for the water to pass through the filter. The system in the best inline water filters doesn’t affect the rate until it reaches the end of its life, at which point it might be too clogged with contaminants to filter water quickly.


A typical inline filter has a capacity of 3000 gals (which is roughly 6 months) or a capacity of 20,000 gals (or about 5 years). The capacity of a filter is not necessarily a lower-quality one. It just means that it will be more expensive upfront and will need to replace more often.

It’s usually cheaper to pay $30 to $40 for 5-year filters than $20 for half-year filters. This will save you money over the long term. Many in-line water filtration systems advertised to have a long life expectancy don’t last as long as they should. Customers have complained that their 5-year systems only lasted for a few years. This is a good thing and still a great deal. However, it is something to keep in mind.

Physical Size

Inline water filtration systems are usually small due to their capacity and the ability of the manufacturer to create something that is space-saving. The size of your filter system doesn’t really matter if you have enough space in your basement, kitchen or anywhere else you want to put it.

For example, if you intend to install an inline filter water filter behind your refrigerator or in cabinet space, then you will need something small enough to fit.

Best Inline water filters typically measure around 10 inches in size. The width of filters can vary greatly, with some filters being 2.5 to 3 inches wide and others measuring more than 6 inches. Most filters measure between 2 and 4 inches high.

Filter Certifications

NSF Standard 42 is the most popular certification for inline drinking water filter systems. It reduces chlorine taste and odor in water. NSF 53 certification is rare for the best inline water filters, which can reduce heavy metals such as lead.

A certification on an inline filter system can help you feel confident that it is the best available to reduce a specific contaminant. A filter that has been certified by the WQA to NSF/ANSI Standards has had its filtration claims confirmed by a third party.

This is a simple way to ensure that your money won’t be wasted on a filter that doesn’t work.


An inline water filter doesn’t require a large budget. However, depending on which filter system for ice makers you choose, you might need to invest in new filters at least every other year. Even the most expensive and the best inline ice maker filter systems won’t last forever. You’ll need to budget for the future.

Ice maker filters cost $20 to $40. Some systems have a longer life expectancy and can cost up to $50. You’ll usually spend more if you buy from a trusted brand.

Although it can be risky to pay less for an off-brand filter, many people find success using them. Don’t be discouraged by the fact that a filter may not be manufactured by a well-known brand. However, it is possible to find great deals even if your budget is tight.

How to Install Your Inline Filter

An in-line water filter can be installed easily by you. This is great if your goal is to save money and avoid the need to hire a professional. Although installation can vary depending on the inline water filter system purchased, the process is generally the same.

  1. Gather your materials. You will need a utility knife or a pair of scissors that can make clean cuts. A bucket, towel, and work gloves are all you will need.
  2. Turn off the water supply to your tap. It would make installation a mess if you don’t shut off the water supply first. Under your kitchen sink, you will find a water shutoff valve. Turn it in the opposite direction and turn off the water supply. Then turn on your faucets for any excess pressure.
  3. Unplug your refrigerator. If you are installing an inline water filter for your refrigerator/ice maker, you will need to unplug it and remove it from your wall.
  4. Install filter mounting hardware. Attach your filter mounting equipment to your wall. This job will require a drill or screwdriver. You will need a drill or a screwdriver to attach the mounting equipment to your filter. Most filters must be installed vertically. Some filters won’t work horizontally.
  5. Cut the water supply lines. Use a knife or pair of scissors to cut the water supply lines in the area where you want to place your inline filter. To clean the ends of your cut supply line, use a towel.
  6. Attach the inlet tube. Observe the body of the water filter. One side should be the inlet side and the other side the outlet side. To ensure that the tube is securely connected, push the inlet end from the water line into your water filter.
  7. Removing any carbon residue. Attach the inlet end to the waterline. Hold the filter at an angle, and place it over the bucket. Turn on the water supply. Wait until at least 2 gallons have passed through the filter into the bucket. Switch off the water supply.
  8. Attach the outlet tube. Push the outlet end from the water line into your water filter. To make sure the water line is properly connected, tug the filter onto the bracket.
  9. Verify that your water supply is on and off. To stop water from escaping, push the tubes deeper into the filtration system. Once you are satisfied that the system is functioning properly, plug your fridge back into the wall and push it in place. Turn on the water and taste it. It should be cleaner.

Maintenance of an Inline Filter

Your inline water filter will only need to be maintained by changing its filters. If you are unsure about the filter’s life expectancy, consult your manual. If your water quality has decreased or your flow rate has slowed, you may have to replace the filter less often.

Another easy task is to replace the filter. You will need to replace the whole system and then install a new filter following the instructions. Before you use the system, make sure to flush the filter.

FAQ About Inline Water Filters

What is an inline water filter exactly?

An inline water filter can be added to your existing water supply. An inline water filter is a good option if you have hard water, or are using well water.

Are inline water filters limited to sinks?

You can fit an inline water filter to any water supply. You can also get refrigerators with icemakers, showers and campers.

How often should I change my filter?

The brand and type of filter you choose will determine the filter that you use. Each filter has a different life expectancy, so you should take this into consideration when making a decision.

Are inline water filters compatible with iron?

Iron is a common element in water, particularly in rural areas. Some filters cannot filter iron or other metals. Make sure you get one that has been approved by the NSI and WQA. These approvals will let you know exactly what each filter can do to your water.

What is better an inline water filter than an internal refrigerator filter for a fridge?

Yes, in some ways. Although both filters provide clean water, inline filters have a longer life span than internal fridge filtration systems. An internal filter can be more difficult to fit into your system. However, an inline water filter will work in your fridge or icemaker regardless of brand.

What happens if your inline water filter is not changed?

An inline filter cartridge is limited in its ability to remove contaminants from water. Your filter will stop working after its maximum lifespan and produce less clean water. If your filter doesn’t remind you to change it, it is important to do so.

Most inline filters decrease chlorine. Why is chlorine so important?

Municipal water is treated with chlorine to make it safe for drinking. Consuming small amounts of chlorine will not cause major health problems. Many people dislike the taste of chlorine in their water or ice maker. Too much chlorine can cause health problems. Inline filters filter out the majority of chlorine, making it taste fresher and more pleasant.

What should you do if your inline filter is leaking?

A leaking filter is usually caused by an installation problem and not a fault with the cartridge. It is usually easy to fix the problem. Leakage can be caused by the water line not being pushed in deep enough. It’s best to turn off the water supply, plug in the water filter and push the water line into the filter as deep as possible. Then, switch back on the water supply, turn the water back on, and then check for leaks.

Which inline water filter is best for me?

The majority of inline filtration systems for getting drinking water are similar so the decision is largely based on your budget and the desired contaminant removal. You will see the greatest improvement in your water quality and taste if you have a good idea of what contaminants your water contains. You can choose wisely based on your annual budget when it comes to the price of your filter.

My inline filter is making my water taste strange. What could it be?

Check whether the instructions have been followed correctly and the ice maker water filtration system was flushed with water for at least 2 gallons before you use it. The funny taste you get from the filter is likely due to compressed air bubbles that have made their way into your drinking water. After a few days, the taste should disappear.

What do I need to do to clean my inline filter?

It might seem easier to clean your ice maker water filtration system by hand, but it is not recommended. After the filter’s recommended lifetime, you should throw it away. An inline water filter cannot be cleaned by running water through it. It is packed with small filtration media that traps contaminants and prevents them from escaping. You can clean the filter’s exterior with a damp cloth.


There is so much information available when choosing the right line water filter.

Remember that your situation is unique and what works best for you might not work for your parents or friends. Make sure you gather as much information and are as informed as possible about your specific needs.

We now have many options for making clean water possible thanks to modern filtering technology. You can find an inline filtration system option for whatever budget you have, no matter what your environment. The drinking water quality is sure to improve if you make the right choice.

Clean water is something you cannot price. It is valuable and something that we all deserve. This guide will help you find the right solution for your problem, whether it is hard water or chemical-laden water.

Make sure to consider all information about each ice maker water filtration system on my list to make the best decision possible.

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