Best Inline Water Filter – Top 5 Reviews and Buying Guide 2018

Wouldn’t you want to filter your home water using a suitable filter that will lie between your appliances and water line?

Well, we will walk you through some of the water filters that will help you ensure that the water you consume in your house is 100% healthy and pure. An inline water filter saves you a lot more space than other filters.

However, looking for an ideal inline water filter for your home can be a little confusing because there are so many in the market. No worries! We will look into our top inline water filters in the market. But first…..

What You Need to Consider Before Buying Inline Water Filters


Much like water softeners, inline filters are water purifiers that you plumb into your supply line. They help by purifying every single drop of water that goes through it, which is why you need to consider why you need one in the first place carefully.

Inline filters are always on, so there is no on or off option. They can be used for specific appliances or as faucet purifiers. So to know what you are really looking for in an inline water filter you need to find out what your drinking situation. However, you need to know that if you use an inline filter through your kitchen faucet, you will be required to replace it more often.


Once you determine why you need an inline water filter in the first place, then you have to make sure that you get one that will do the intended purpose efficiently. Believe it or not, not all filters filter your water as per your expectations.

At the end of the need, you have to buy a brand that will be at least 99% effective. By doing so, you will be making sure that you get a model that’s top-performance and supplied you with water that’s clean, free of contaminants, odor, chlorine taste, and improved taste. To make sure if the model works as per the manufacturer’s claim, you need to check if it comes with NSF/ANSI and WQS certificate seals.


You have to figure out where you will be launching your ninjas. Generally, the filters are about 10 inches long meaning that they aren’t as lightweight as you expect. So if the filter comes with mounting hardware, you’re in luck! If it comes with no mounting hardware, then it’s wise to get one.

What we mean is, you have to make sure that the purifier has enough space around it for you to be able and install and change the strainer without any strain.

Lifespan of the Filter

Figuring out where you will launch the filters means that the changing fitters are what makes the water filter work. This means that the number of times you get to change the filter depends on the model you choose.

The period can last from 3 to 6 years and sometimes even more. If you want to save on your replacement costs for new cartridges, then you should make sure that you get a model that will last longer. Go for the filters designed with quality materials they will have longer lasting strainers.

So make sure you look at the yearly cost of replacing the purifier according to the recommendations given by the manufacturer and the costs involved.


Sometimes you need to check the brand before buying a product, some brands speak for themselves! Some brands have been around for a couple of years, and that means that it has taken them the same number of years to build quality filters that meet all your expectations and needs.

Ease of Installation

I’m sure you wouldn’t want to have a difficult time installing a filter, no one like unnecessary headaches. This is why you need to examine whether the model you want to buy is easy to install. Make sure that the filter comes with manufacturer instructions and installation tools that way you will be able to set it up. Also, make sure that it is extremely easy to replace the filters in the unit you want to buy.

Replacement Costs

You need to make sure that you check the annual expenses you might need to replace the purifier. To do this, always check the manufacturer’s recommendations and the cost that is involved.

The Top 5 Inline Water Filters

Comparison Table

RankingBrandCapacity(in gallons)Buy Here
1Filtrete Under-Sink Advanced Water Filtration ( Editor’s Choice2,000Check Price
2Watts Inline Filter
(Runners Up)
20,000Check Price
3Culligan EZ-Change Icemaker? Drinking Water Filter3,000Check Price
4SmartWater GE GXRLQ Inline Water System750Check Price
5Whirlpool Inline Water System1,500Check Price


  1. Filtrete Under-Sink Advanced Water Filtration

Remember when we said that sometimes it helps to go for a well-known brand, well this is a widely known company. As the name suggests, this water filter is fitted beneath your skin which means it vastly improves the quality of your water and taste.

You can connect it to the bathroom or kitchen faucet, and it takes less than thirty minutes to install which makes it easy to install. With this filter, you have to attach it to the sink for you to get safe and clean water through the tap.

Since it is attached to the sink, it helps reduce bad odors and chlorine content that get into your household water. There is an electrically charged medium within the system that’s used for attracting and filtering the water contaminants. Like magnets, they remove the unwanted water components easily.

It is a handy design which makes it easy to use. The system is also worth the cost because it works well. It has a lifespan of 6 months and can hold 2000 gallons. However, the NSF has not tested or certified it, so that’s a downside.


  • Can be used as an under skin faucet purifier or for both appliances
  • Easy to install
  • Cost-worthy


  • Not tested or certified by NSF


View price on Amazon


  1. Watts Inline Filter

The operation of this filter is as simple as the name. Considering that this filter is not an under-the-sink purifier, it is significantly huge with a capacity of 20,000 gallons. It’s also very convenient because you can use it to purify water for your ice maker, coffee machine, or other appliances.

The company assures a lifespan of five years. It also won’t go all funky on you because it has bacteriostatic properties. It will also help reduce scale buildup, gets rid of chlorine taste and smell. It is certified by Water Quality Association, but it’s not NSF certified.

This filter, however, can’t work for contaminated liquid or seriously dirty water. It also has brass connectors for a secure fit. However, after the water goes through this filter, the quality of water is improved tremendously.

It has the most prolonged lasting inline water capacity which means you will use it for a number of years. This is a bonus because most water filters last only a couple of months.


  • It goes for a five-year span because it is bacteriostatic
  • Has a more secure connection because of the brass connectors
  • It’s easy to install
  • The quality water output is good


  • The installation kit is sold separately


View price on Amazon


  1. Culligan EZ-Change Drinking Water/Icemaker Filter

Just like the name suggests, this filter is perfect for refrigerators and ice makers. The filters are easy to change because it has screws that make the process practical and convenient. The screws are into the wall with the purifier plugging into it. It is therefore easy to also replace it.

The filter also removes bad tastes and odors from the water, reduce lead, chlorine, cysts like giardia and cryptosporidium, atrazine, turbidity, class 1 particulates, and lindane from your water. This means that it’s the best option if you want to drink water that tastes and smells better.

It has a 3,000-gallon lifespan. It can filter 5000 gallons constant water for about six months without having to replace the cartridge, this means that’s the filter can last about 3-4 years. The company, however, makes no bacteriostatic claims about it.

It takes just a few minutes to install the filter because all you need to do is connect the inlet and outlet tubes with fittings that are quick to connect. This means that the replacement is also easy. If you are big on brands, then you can’t go wrong with this filter because Culligan has a reputation for its products both internationally and locally over the years.

Compared to other systems, the product cost is very friendly. The water is also improved immensely since after being treated in the system it smells and even tastes better.


  • Easy installation and removal
  • Can’t be horizontally mounted
  • Low replacement filter price and low unit price
  • The water obtained after purification is good quality


  • The head unit takes up more space because it is a bit bulky


View price on Amazon


  1. SmartWater GE GXRLQ Inline Water System

This design is quite easy to connect to the icemakers or fridges with an existing waterline and those without. If you happen to have the GE icemaker/fridge, it will be easy to install this feature because it has a space that’s entirely dedicated to the filter.

It also has premium feature certified by NSF/ANSI meant to reduce life-threatening asbestos, chlorine-resistant cysts, lead, and about five other contaminants that tend to make the water unsafe for consumption. It has a lifespan of a typical inline water filter, which is six months, meaning that it can hold up to 750 gallons.

It has a twist-lock filtration mechanism that makes installation easy, as well as the replacement process. The compact design will offer you better tasting drinking water and ice from your refrigerator. And the best part is, you don’t even need any tools for replacement.


  • Easy to install and replace the purifier
  • The lifespan is reasonable for a household
  • The taste of the ice and water is improved


  • OEM replacement purifier cost is actually higher than that of the unit price


View price on Amazon


  1. Whirlpool Inline Refrigerator and Water Filter

This inline water filter is perfect because it is not only for Whirlpool refrigerators but other brands as well. It is meant to be put in the back of your unit. It has a convenient push in the fittings that make the installation easier.

It is designed to remove impurities and offer you with clean and safe water and ice as well. It removes impurities like dirt, chlorine, limescale and also capable of removing sediment materials or particles present.

It can hold a capacity of 1,500 gallons with a lifespan of about six months. It has been tested and certified by NSF which means you can trust it to make your water clean.


  • Easy installation
  • It is economical compared to other brands
  • The purified water has good taste


  • Some people have complained about leakages


View price on Amazon


What’s Our Pick!

The Filtrete under sink inline water filtration system is our pick because it can be put under the sink to vastly improve the taste and quality of the water running through your taps. You can comfortably fit it in your kitchen or bathroom faucet in less than thirty minutes.

It reduces microbial cysts, sediment, chlorine taste and odor. This is an excellent alternative for people who don’t have a full water filtration system in their kitchen faucet because not only is it easy to install; you can also change it after six months.


When it comes to the perfect balance of filtration and size, the inline water filters come in handy. If you want to protect your investment or appliances, then it is necessary that you get one. The inline water filters will save you as much space as possible while making your water pure.

These top 5 inline water filters can be installed in less than an hour, and the service and maintenance of the units are minimal.

Please note: if your household water is extremely bad, you might want to consider getting whole house filtration system from brands like Fleck, Aquasana, or Waterboss



Taylor is an adrenaline junkie. If you do not find him writing for homewaterclense, he will be on his Harley; riding with the wind. He loves spending his time scaling the mountains, skydiving and if time allows he will be scuba diving at some ocean; his game for anything that will keep his blood pumping. Taylor lives on the mantra that life is not a dress rehearsal and so he makes good use of his time here on earth. He is married to a beautiful wife and they have two lovely children. A man of very little words; Taylor is the engine that keeps the website going.

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