Clean drinking water is the most invaluable resource on the planet. Unfortunately, not all water supplies enter our homes with sediment and contaminant-free. By purchasing an inline water filter, you will be able to sleep peacefully at night, knowing that you have clean and pure water every day.

best inline water filter

Not everyone can afford a filtration system for the entire home. This does not mean that clean water is out of reach, and an affordable way to accomplish this is by installing an inline water filter. Technology around filters has evolved tremendously in the past decade, and we, as consumers, are reaping the benefits.

Starting at around $$, you can install an inline filter into your sink or main drinking water supply in no time. With an average filter life of 4-6 months, this small investment is worth it thousands of times over. Clean and purified drinking water will give you peace of mind that every sip you take is free of added contaminants.

By using our guide to the best inline water filters, you can decide which is best for you and your specific situation. Whether you’re living in a city with hard water and high levels of chlorine or in a rural area, our guide will direct you to choose the best inline water filter.

Recommended Inline Water Filter

Inline Water Filter Kit for Ice Makers

  • Provides better tasting ice and water. Chlorine taste and odor reduction.
  • Service life of filter is 1500 gallons.
  • The included Quick-Connect fittings made installation very easy.

Culligan RC 4 EZ-Change inline filter

  • After installation, this filter requires zero maintenance.
  • It helps remove most contaminants responsible for bad odor
  • This unit works well with your already installed water filtration system from the same manufacturer.

iSpring FA15 10-inch Inline Quick Connect

iSpring FA15
  • The iSpring model is equipped with alkaline filter to replace the filtered minerals
  • This unit helps balance your water pH, which is one of the best on the market
  • It combines its inline filter and RO system to deliver clean and purified water any time

✔️ Top 10 Inline Water Filter Reviews

1. Inline Water Filter Kit for Ice Makers


As somebody who installs a lot of different water filtration devices, there are a couple of things that I truly appreciate.

One of those things is an easy install. With this icemaker inline filter, I was able to install it in less time than any other inline filter. All the parts that you need, including hardware, are right there and ready to roll. The extra 15 feet of the water line is truly amazing.

I could have installed this into the refrigerator water line in several ways with that extra line. It is a beverage-grade water line, so it can be used for any other beverage application you need. That could be a soda station, water fountain, or under sink water filtration system that needs a relining. But when it comes down to it, the performance is all that matters.

This inline water filter performs with the best of them, especially when it comes to filtering out odor and chlorine in your ice. Cloudy ice is a very common problem that we see in refrigerators with ice makers.

If you have hard water going into that water line, the ice will show those hardness particles. Another nice benefit of this inline water filter is that if you install it for the icemaker, it will also work on the water that comes from your refrigerator.

What We Like:

  • Includes 15 extra feet 1/4th inch water line to connect to an existing water line.
  • The graphic instructions were easy to follow.
  • The included Quick-Connect fittings made installation very easy.
  • It can also be attached to any water supply that uses the same size water line.
  • It greatly reduces chlorine levels and reduces odor.

What We Didn’t Like:

  • We noticed that if we install this with a refrigerator that has a dual ice maker, it will not be as effective as a single icemaker fridge

2. Culligan RC 4 EZ-Change Premium Replacement Cartridge

Culligan RC 4 EZ-Change

When I was a kid, Culligan was the only water company I knew. They have a wide variety of trusted products, the inline water filter being no exception. The massive 500-gallon filter can provide your family with clean and purified water for months through your sink.

Easily attached to your already installed Culligan water treatment system, this filter cartridge is certified to eliminate or reduce a ton. Nearly every contaminant that is known to cause odor or is not good for you can be removed by this filter.

Regardless of your water supply tubing size, the Culligan filter has adapters to accommodate any size of tubing. With immediate improvement upon water odor and taste upon installation, the Culligan brand should be proud to attach its name to this inline filter.

What We Like:

  • There is zero maintenance with this filter once it is installed.
  • The #4 filter filters out over 99.9% of contaminants in your water supply.
  • I noticed the taste of the water was much cleaner than before the filter was installed.
  • Affordable filter price.

What We Didn’t Like:

  • You must have the Culligan RC-4 water system installed, so this won’t apply to everyone.

3. iSpring FA15 10-inch Inline Quick Connect Replacement

Spring FA15

Most filtration systems have one distinct problem; they filter out the good stuff too! Some natural elements, like fluoride, are good for you, at the right levels of at least.

The iSpring model will replace the minerals that were removed and insert them into your water supply using the alkaline filter. With the affordable price point of around $$, you get a ton for the price from this unit. pH levels are one of the most important readings we take when testing water filters. For an inline filter, the iSpring system was one of the most impressive pH balancing filters we have seen. 

By combining the iSpring RO system and this inline filter, you can provide months of clean and purified water for the whole family. It is advertised to increase pH by 0.5-1.2, but upon testing, we saw results that exceeded that.

What We Like:

  • Push-fit quick connection for easy filter replacement.
  • The alkaline filter provides natural calcium, magnesium, sodium, and potassium ions.
  • The included Quick-Connect fittings made installation very easy.
  • Adding it to a reverse osmosis (RO) system can make pH levels rise above 10.
  • Noticeable deduction of odor from well water test.

What We Didn’t Like:

  • No instructions were included, and the installation was not as straightforward.

4. GE Replacement Water Filter for Inline Systems

 GE Replacement inline

GE leads the way in appliance technology, and the same engineers make their filters, ensuring quality. With a long-lasting filter life, combining these filters with a GE water system is a smart move for every household. No matter the quality of water you have, it can always be improved. This premium filter will immediately reduce lead and several other harmful chemicals. One of the most common water complaints we get is chlorine. The smell and the taste of chlorine can cause irritable skin, and the taste is terrible. Luckily, the GE filter removes this with ease.

The simplest install yet, these twist and lock filter changes are easy to do, even for the least handy people out there. Given their long life and ease of changing, the GE filter is a great option for those of you who are looking for improved water throughout.

What We Like:

  • Removes thousands of impurities including BPA, lead, mercury, and chlorine.
  • Easiest install of any filter I have tested thus far.
  • The chemical taste was removed from the water right away.
  • Odors were removed from the water upon installation.
  • NSF approved on multiple testing levels.

What We Didn’t Like:

  • It is only compatible with 4 GE model filtration systems.

5. Watts Inline Water Filter 20,000 Gallon Capacity

Watts Inline Water Filter

Watts has been in the water industry for over 130 years, and its inline water filter proves why they are so successful. By having the ability to connect the inline filter to any water supply, you can install these anywhere in the house.

Coming at a price of right around $$, this inline filter is extremely affordable. Whether you want to have, cleaner ice coming from your refrigerator or clean water for your RV while at the campsite, the Watts inline filter does it all.

The 20,000-gallon filter is certified for bacteriostatic properties, which guarantees filter life will be extended. Filters are easily changed out and are affordable, making sure you are not without water very long.

What We Like:

  • Works in refrigerators, icemakers, RVs, campers, boats, water fountains, water coolers, and more.
  • Noticeable improvement in chlorine tastes and foul water odor.
  • It will reduce the limescale build-up in all appliances it is connected to.
  • The clarity in ice and water is greatly increased.
  • Quick connection adapters make it easy to install with current plumbing.

What We Didn’t Like:

  • It does not work with any other piping than 1/4th inch.
  • Plastic construction is not the most durable material, and leaks can occur easier.

6. Amazon Basics Inline Water Filter

Amazon Basics Inline

AmazonBasics has brought us a ton of quality consumer products that are supposed to be simple and effective. The inline water filter is no exception. By far, the easiest installation time we experienced, and the hose attachment was very convenient. 

For a smaller inline filter, this model can filter out a ton of different water contaminants—chlorine, sediment, aluminum, cadmium, fungus, and heavy metals. Speaking of heavy metals, these are important when it comes to filtering water.

Rural areas and well water supplies are typically high in metal, and the AmazonBasic inline filter can help with that.

What We Like:

  • Quickly connected to both faucet and hose during testing.
  • A 20-micron filter gets rid of sediments and metals.
  • Upon installation, any water odor was eliminated.
  • Priced at about $$, the value was unmatched.
  • It comes with a standard 1-year warranty from the supplier.

What We Didn’t Like:

  • Filter life information is not well known; it requires testing water to know when to change it.

7. Filtrete Advanced Under Sink Inline Filtration System

Filtrete Advanced Under Sink Inline

3M is a household name in all things industrial, so you know they were going to make an appearance on our top 10 list. This under-sink model is an easy way to turn the hard water coming from your faucet into crisp, pure, and clean drinking water. 

The filter has an advertised lifetime of 6 months or 2,000 gallons, but one of my absolute favorite features of this 3M model is the filter life reminders. They have two different ways of reminding you to change the filter.

They provide a few stickers with dates so you can look under your sink at the filter and check when it was last replaced. The other option, the much cooler option, is a text message reminder system, which is unique to 3M. Combine all those features with the fact that the 3M inline filter does its job. It does a great job of reducing chlorine and odor that comes from hard water.

In addition to those benefits, is a great option for those of you who want to reduce the amount of lead and other heavy metals within your water supply. Between the great features and the easy install, the 3M model is a great choice for many homeowners.

What We Like:

  • Quick install into your current tap water system.
  • Filter replacement is quick and easy.
  • 3 different options of filters; Standard, Advanced and Maximum.
  • This inline filter reduces lead by up to 99.3%.
  • There was no reduction in flow rate, it stayed solid at 2.25 GPM.

What We Didn’t Like:

  • The maximum operating temperature is 100 degrees (F.)

8. Lasco 37-1821 Ice Maker Inline Filter

Lasco 37-1821

The phrase, “Big Things Come in Small Packages” applies to this Lasco inline water filter in multiple ways. With its small size of just 10 inches long by 2 inches wide, this inline filter can fit just about anywhere.

Originally designed to be installed on refrigerators to give you clean and odorless ice, it can be installed in just about every water line (that is ½ inch) you can think of. With the small size of this inline filter, it makes a great choice for anyone that has an RV or camper. When you are living out of one of those vehicles, space and size is a luxury.

You’re not going to want a full-scale water filtration system taking up your only closet or half your living room. Installing this into whichever water line you’d like in your camper/RV will not even be noticeable with its small size. One thing I loved about this inline filter was the simplicity.

There are very few pieces to it, and installing it made it super easy because of this. Even with a simple, coconut shell-based housing and filter, do a decent job of filtering out the hard water particles.

I cannot reiterate it enough; the small size of this device makes it a great option for any application, especially in tight spaces.

What We Like:

  • Installs directly to your water pipes and then into your water line for easy to install.
  • Ice was noticeably more clear and cleaner.
  • Chlorine and sulfur smell were noticeably better right after install. The chlorine and sulfur smell were noticeably better right after install.
  • Small-sized makes it easy to install anywhere you need it.
  • Coconut shell is ultra-durable and is a great material for inline filter systems.

What We Didn’t Like:

  • It cannot use with any other pipe thread sizes.

9. Omnipure K2533JJ Inline Water Filter

Omnipure K2533JJ

One of the biggest complaints we receive about icemakers is that ice comes out cloudy and has a terrible taste. Luckily, Omnipure is here to save the day!

Designed to do big things in a small package, installing this inline filter in your icemaker or refrigerator will do wonders for the clarity and taste of your ice cubes. 

If you have a separate icemaker or an icemaker in your refrigerator, this Omnipure is a great option if you want clean and good-tasting ice. If you do have the icemaker built-in in your refrigerator, you will also reap some major benefits from better water coming from your fridge as well. 

Another benefit of the Omnipure system is the size. It does extremely well in tight spaces, given that it is only 10-inches long and 2-inches wide.

If you have a camper, RV, or mobile home, this may be the best inline filter for you. The filter life lasts long enough to keep the cost down, and the filter itself is extremely affordable, to begin with being less than $$.

What We Like:

  • Quick connect fittings made the install process a breeze.
  • Short and slim size made it easy to maneuver into small places.
  • Odor and chlorine taste was much less than before the installation.
  • Connects to any ¼ inch fitting making it extremely versatile.
  • Comes pre-washed, so there is no “break-in” period for the filter.

What We Didn’t Like:

  • The maximum operating temperature of 100 degrees (F.)
  • We saw a reduced flow rate with the water faucet.

10. Whirlpool 4392949 Inline Water Filter

Whirlpool 4392949

Somebody famous once said, “Simple is best,” and if you share that sentiment, then the Whirlpool inline filter is for you. Mount it to the back of your refrigerator and connect it to the water line for the immediate benefits of an inline water filter.

This inline filter will work to improve the quality of the drinking water that comes out of the refrigerator along with improving the ice that comes from the maker. Because it is a refrigerator-mounted inline filter, it is extremely small. While this does not bode well for the lifetime of the filter, it does have other benefits.

Because of the short and skinny size, you can fit this behind the refrigerator with ease, and you will never have to see it again until you need to change the filter. Because it doesn’t need any extra parts to install it, you can install this on any ½ inch water supply pipe.

If you have an RV, camper, or mobile home, simply attach this to the waterline of your choice, and you will see improved water.

What We Like:

  • No plumber needed to install, one of the easiest we installed.
  • The flow rate was not any slower after installation.
  • Because it is connected to the refrigerator’s water line, it improves both ice and water quality.
  • The easy flow direction identifier on the shell of the inline filter was a nice touch.
  • ½ inch filter fittings will work with any ½ inch water supply for any appliance.

What We Didn’t Like:

  • Filter life is not as good as others, and there is no way to tell when to change it.
  • It does not include any Teflon tape or additional tools for installation.

✔️ Things That Matter the Most When Buying an Inline Water Filter

We know there is a lot of information being thrown at you right now. Deciding on which is the best inline water filter can be a difficult and daunting task. Some of these require pre-installed systems, while others are used with existing water supply.

Luckily, since we consult with customers all over the world, we can help you decide which the best inline water filter is, or at least point you in the right direction.

There are several things you need to look at when it comes to choosing an inline water filter. We will go through these steps you need to take and a few key facts that should be weighed into your decision.

What Type of Filters are needed in an inline system?

As you saw from our list of inline filters, there are a lot of different types and options. You need to figure out exactly where the filter needs to be installed. Are you looking for cleaner ice coming out of the ice maker? Or do you want cleaner sink water to drink and clean up with?

You may have an existing water purification system that needs filters. These are all things that need to be considered before you make that decision.

Here are a few examples of inline filter types; you may need to look directly at these:

Specific Filter for Existing Water Systems

There are a bunch of home water purifying systems. If you have one of those, make sure you find one that works for that specific type!

Refrigerator Inline Water Filters

If you have a refrigerator with a water line attached or an ice maker, you may want to look at adding an inline water filter.

Most refrigerators with water lines have an included filter for the drinking water portion, but not all. But, the ice makers, which also use the same water line, will most likely not have a filter and can produce cloudy, stinking ice!

Under Sink Inline Water Filters

Having clean sink water is one of the most important things to me. For drinking water or washing dishes, it is invaluable. Take a look at a few of our options that can work under the sink directly to the waterline.

RV/Camper Needs

If you are looking to purify water in your camper or RV with an inline filter, there are plenty of options! Just find one that works for you and your budget and do not look back.

Understand Your Water Supply

Every water supply is different. Usually, this will depend on one thing: Location. As with most things in life, location is everything. You will need to know exactly what sort of water you are dealing with. Specifically, you need to know what is in your water. If you are in an urban area, you are going to see wildly different things in your water than if you are in a rural environment with a lot of lands.

You need to have a full understanding of what exactly is in your water. Certain contaminants are more frequently found in specific situations, and you must know exactly your situation. Rural areas, where some people may have well water, will typically be higher in metal and other corrosive elements. If this is you, make sure when selecting your inline water filter to look for one that is highly rated to handle metals like iron and lead.

In city environments, chlorine and sulfur tend to be the more active characteristics of water along with micro-contaminants. When selecting your filter, you will want to have a look at filters that can manage that most likely.

Of course, there will always be exceptions, and the best way to make sure you’re accounting for every possible situation is to get a water test done. You can purchase strips online or at several outlets that will tell you exactly what is in your water. By knowing this information, you can make the best inline water filter decision possible using all the data at your fingertips.

Water Usage and Filter Life

Throughout all our research, one thing we look at with every inline filter is the life of the filter. One of the most common questions I get is: How many gallons of water can I run through the filter before I need to replace it?

Inline water use

This is a very good question, and most filters will have an “expected” lifetime or a generic time frame of when to change the filter out. Like everything else we’ve talked about, it will vary from person to person based on how much water they use and how hard their water is. But the thing to remember is that filter life is solely based on how much water you put through it.

If you are a small family or even just a couple, your usage will be much less than a family of 4.5 or 6. The filter life will last longer, the less you use it. You must know exactly how many gallons of water the filter can take before being changed out. If the filter you are looking at just says, “6 Month Filter Life,” that 6-month time period is a total guess, and that may not be the case for your family.

I always tell people to keep an extra water testing kit on hand, if you test the water and know exactly when the filter is no longer doing its job.

FAQ’s About Inline Water Filters

What exactly is an inline water filter?

An inline water filter is a water filtration device that is added to your existing water line.

Why would I need an inline water filter?

If you have hard water or are dealing with a well water supply, an inline water filter can clean and purify your water.

Do inline water filters only work with sinks?

No, you can install an inline water filter into nearly any water supply. Refrigerators with icemakers, showers, campers, and RVs, too!

How often do I need to change my filter?

Filter entirely depends on the brand and filter you choose. Each one will have a specific filter life, and you can take that into account when deciding.

Do inline water filters work with iron?

Iron is a common element found in water, especially in rural areas. Not all filters can filter iron and other metals, look for one that is approved by NSI and the WQA. These approvals will tell you exactly what each filter can remove from your water.


We know there is a lot of information to take when deciding the best inline water filter for your situation. But remember one thing, it is YOUR situation so what may be best for you may not be the best for your friends or parents. Be sure to gather as much information as possible and educate yourself on your exact needs.

Thanks to the evolution of filtering technology, we now have so many high-level options to make clean water a possibility. No matter the budget or environment that you are in, you will be able to find an inline option that will work for you.

You cannot put a price on clean water, it is invaluable and something we all deserve. If you are dealing with hard water or too many chemicals, we hope this guide directs you to something that works for you. Remember to take into account all of the information at hand and make the best, most educated decision for you.

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