Best Inline Water Filters

Groundwater can be contaminated by products like gasoline, oil, road salt, fertilizers, pesticides, or other chemicals. This fact can make it unsafe for human use.

Most people drink municipal water that that has been processed at a water treatment facility. It makes water absolutely safe for health but affects its odor and flavor (residential tap water usually has the chlorine taste).

Your drinking water is important to you, and rightfully so. If you wanna stop worrying about the quality, taste and odor of the water you use for 3-5 years, think about choosing the best inline water filter.

I have examined several units, some of them are created for refrigerators, ice makers or you can in line it to your kitchen faucet. The others are created to be used in a whole house or in an RV.

Find your own best inline water filter 2020!

Best Inline Water Filter 2020 Comparison

CuZn UC-200
  • Easy to install
  • Impressive warranty
  • Highly capable
Woder 10K-Gen3
  • Comes with all the pieces for the mounting
  • Budget model
  • The longevity of filters
APEC Water Systems CS-2500
  • High quality components
  • Easy to install
  • Long-lasting performance
Woder 10K-DC
  • Easy to mount
  • Selective filtration technology
  • Long filter life
Watts 5YR Premier
  • Easy to install
  • Long filter life
  • Great tasting ice cubes
3M Aqua-Pure Whole House Replacement Water Filter
  • Effective at removing contaminants
  • Easy to change
  • High flow rate
Under Sink 4 Stage Direct In-line Tap Water Filter BLUONICS
  • Easy to install
  • Long filter life
  • Doesn’t slow down flow at a faucet

Best Inline Water Filters 2020

CuZn UC-200 Under Counter Water Filter – Best Inline Water Filter System

CuZn UC-200 Under Counter Water Filter

CuZn UC-200 presents a 3-stage filtration system that prevents the growth of bacteria and the spread of various kinds of diseases in the water.

  1. Micro Sediment Membranes eliminate the carbon elements from water
  2. KDF-55 creates a bacteriostatic environment in the filtration system and prevents microbial growth.
  3. Coconut Shell Carbon

The UC-200 Filtration System keeps essential elements in water. The chlorine strips allow monitoring the performance and testing of the water easily

These water filters also reduce the chlorine levels by 20-30% on average.

The unit can provide you with water for up to 50 thousand gallons, it is enough for almost 5 years. This best inline undersink water filter doesn’t have the possibility of third faucet hassle. This way, mounting the system on the kitchen sink becomes much easier and takes only a few minutes. You don’t need plumbing skills for installing.


  • Product Dimensions – 4.5 x 4.5 x 15 inches
  • Item Weight – 8 pounds
  • Flow rate – 2 gpm
  • Capacity – 50000 gallons

  • Easy to install
  • Impressive warranty and guarantee period
  • Highly capable
  • Makes the water taste and odor great
  • A little larger than other models

This best rated inline refrigerator water filter is highly recommended for those who want to remove the chemical bad taste and odor of water.

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Woder 10K-Gen3 Ultra High Capacity Direct Connect Water Filtration System – Best Small Inline Water Filter

Woder 10K-Gen3 Ultra High Capacity Direct Connect Water Filtration System

The Woder 10K-Gen3 is an effective inline water filter that is NSF approved. Its filters can filter up to 10 thousand gallons of water, so it’s enough for 3 years of use without changing. For longer life, don’t use it with well water, salty, hot or softened water.

This best inline drinking water filter uses a unique technology eliminating Lead, Chlorine, Heavy Metals, contaminants, bad odors and tastes and leaves in all minerals which are essential for our body (calcium, magnesium, phosphorus, chloride, and potassium).

The Gen3 is an imroved version of the Gen2 filtration system. The difference is it includes a smart head with a built-in valve. So you need  replace only filters while the previous model must be replaced as a whole system


  • Flow Rate – 2gpm
  • Product Dimensions – 3 x 3 x 15 inches
  • Item Weight – 2.9 pounds
  • Capacity – 10000 gallons
  • Comes with all the pieces and accessories for the mounting
  • Budget model
  • The longevity of filters
  • Using this in line water filter reduces the water pressure that reaches your faucet up to 20%.

The Woder 10K-Gen3 is perfect for those who want to get safe water from a kitchen’s cold water from tap without losing essential minerals.

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APEC Water Systems CS-2500 Ultra High Capacity Undersink Water Filtration System – Best Inline RV Water Filter

APEC Water Systems CS-2500 Ultra High Capacity Undersink Water Filtration System

APEC Water CS-2500 system will provide you with high-quality water at an affordable price. This inline water filter for RV can last up to 1 year (its life depends on water quality).

It connects directly to your cold water line and to the faucet. You can also use it to clean the water entering the fridge if you have an adapter.

Thу CS-2500 inline water filter for caravan filter doesn’t work like water softener, but eliminate 90% of iron, copper, lead, and other stuff. The chlorine taste and smell completely disappear.

This single-stage filtration system is designed to work with your faucet and not a separate spigot.


  • Operating Temperature 40 – 100 F
  • Maximum Operating Pressure 125 psi
  • Maximum Flow 1.67 GPM
  • Micron Size 10 micron
  • Hose Size 3/8”
  • Product Dimensions – 12 x 4 x 4 inches
  • Type GAC
  • Weight – 3.95 pounds
  • Connection Type: -3/8” x 3/8” x 30”
  • High quality components
  • Easy to install
  • Long-lasting and reliable performance
  • Quick twist connection for easy filter replacement
  • Works on cold and hot water
  • Don’t need any extra parts
  • after about 2 months of use, the water flow goes down

Due to its compact size and easy installation, this model will be perfect for RV owners.

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Woder 10K-DC Ultra High Capacity Under Sink Direct Connect Water Filtration System –  Best Inline Water Filter for Home

Woder 10K-DC Ultra High Capacity Under Sink Direct Connect Water Filtration System

The Woder 10K-DC filter presents selective filtration technology that removes harmful contaminants and leaves the essential minerals (calcium, magnesium, etc) unfiltered. This means you don’t deprive yourself of minerals which are necessary for human body.

A high-quality Woder inline filter system made of BPA-free materials and comes with a set of additional accessories – 2 hoses, a threaded connector, along with instructions and a mounting bracket. Unlike many other inline water filters which are installed vertically, this unit mounts horizontally. The installation doesn’t take more than 5 to 10 minutes.

Long filter life can provide you with up to 10 thousand gallons of purest water. It’s enough for 3 years of use, but use it only with municipal treated cold water. Salty, well, hot or softened water shorten its life.

Pay attention to the fact that this filtration system does not decrease TDS readings. It shows that it eliminates VOCs and chlorine and doesn’t say anything about total dissolved solids which are particulates. The inline filter traps anything that is electrochemically charged, but it isn’t created to capture particles.


  • Item Weight – 1.9 pounds
  • Product Dimensions – 12 x 2.5 x 2.5 inches
  • A three-month money back guarantee
  • Filter Capacity – up to 10,000 gallons
  • Technology – specially blended carbon
  • Flow – 3GPM
  • Temperature Range – 3 – 50 degrees Celsius
  • Maximum Pressure – 125 PSI
  • Sound Level – 1 dB
  • Hose Length – 70 centimeters
  • Easy to mount
  • Selective filtration technology
  • Long filter life
  • Tends to decrease the water flow rate

This inline drinking water filter is created for those who don’t want to compromise on the quality of the water in their houses.

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Watts 5YR Premier Filter – Best Inline Filter for Refrigerator

Watts 5YR Premier Filter

This unit is universal. Due to its small size and capacity (20 thousand gallons or 5 years of use), it’s perfect for drinking fountains, fridges that have built-in filters, coffee makers, and motorhomes. Watts 5YR Premier Filter is NSF tested and certified to reduce bad tastes and chlorine to the water.

If the water is hard and tastes bad, this inline water filter for ice maker will provide you with good ice and chilled water.


    • Product Dimensions – 15 x 6 x 3 inches
    • Product Weight – 1.95 pounds
    • Filter Capacity – up to 20,000 gallons
  • Easy to install
  • Long filter life
  • Great tasting ice cubes
  • Defective filter housing can crack in the top

This inline water filter for fridge is perfect for people who want the ice cubes in fridge tasted great the whole time.

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3M Aqua-Pure Whole House Replacement Water Filter – Best  Whole House Water Filter

3M Aqua-Pure Whole House Replacement Water Filter

The 3M Aqua-Pure is a very popular model as it combines good price and filtering capacity. It’s famous for its great flow (15 gallons per minute). This filter delivers one of 20 gallons (75.7 liters) of filtered water per minute. This way, you won’t notice a drop in water pressure even if you use several faucets at the same time.

You also don’t need any specific knowledges or tools to maintain the device. The filters last for about a year or more and have just to twist them off and twist new ones in their place to change them. The filter housing is made of plastic and the head unit is metal.

This inline water filter removes dirt, heavy metals, chlorine tastes, cysts, and other contaminants. Polyester filtration material removes particles as small as 15 microns.


  • Item Weight – 5.54 pounds
  • Product Dimensions – 20.1 x 4.1 x 4.1 inches
  • Maximum Flow – 75  liters per minute
  • Capacity – up to 100,000 gallons
  • Lower Temperature Rating – 40  degrees Fahrenheit
  • Upper Temperature Rating – 100  degrees Fahrenheit
  • Effective at removing contaminants from the water
  • Easy to change
  • Lasts for a year or more
  • High flow rate
  • Can be used for hot water
  • If the water is highly polluted you need an extra sediment pre-filter

The 3M Aqua-Pure is definitely recommended to anyone who needs a reasonably priced whole house system.

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Under Sink 4 Stage Direct In-line Tap Water Filter BLUONICS – Best Under Counter Multi Stage Filter

Under Sink 4 Stage Direct In-line Tap Water Filter BLUONICS

The BLUONICS in line water filter for kitchen sink is a system that doesn’t demand a separate faucet. Precise filtration removes the bad chemicals and adds the nutritional minerals a human body need. You don’t need to change filters for 3 years as it can deliver 10,000 gallons of purest water.

The filters that can be changed in a moment without shutting off the water.

The system consists of 4 stages:

  • Stage 1. Eliminates sediment particles bigger than 1 micron (silt, rust, sand, dirt).
  • Stage 2. Remove chlorinated hydrocarbons, chlorine, hydrogen sulfide and prevents the growth of fungi and bacteria.
  • Stage 3. A high-quality substrate with bacteriostatic properties for the eliminating trace organic compounds such as THMs and pesticides. Improves the taste of water.
  • Stage 4. Removes residual chlorine and produces alkali calcium ionized water. Helps to create natural magnesium, calcium, sodium and potassium ions.


  • Item Weight – 5 pounds
  • Filter Capacity – 10,000 Gallons
  • Flow rate – 3 GPM
  • Assembled Diameter – 3.5 inches
  • Easy to install
  • Long filter life
  • Doesn’t slow down flow at a faucet
  • No warranty

This is a perfect inline water filter kit for people who want to get water tasted much better.

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Best Undersink Filters for Water– Buyer’s Guide

So what is the best undersink water filter? Here are some considerations for choosing the model you need.

Purpose and Effectiveness

Inline water filters are plumbed into your existing water supply line and clean every drop of water that goes through it. You need to know what you really want.

Inline filtration systems can be used as faucet purifiers or for specific devices. Inline ice maker filters differ from whole house systems, and not every perfect inline filter for coffee maker will be a good choice for purification in an RV.

If you want an inline filter for a whole house, you need a high-performance model that can sustain the impressive water pressure. If you want the device for an RV or refrigerator, ice maker, compact size and simple insеallation are important factors.

Examine your drinking situation and see what you really are looking for in the inline water filter reviews above. Also, check if the device can remove the water odor and improve its taste.

Location and Installation Process

You need to decide where you install the system and choose the right size. Most filters are created to be under-sink. Make sure there’s enough space not only for a filter but around it too to both install it and change the strainer when needed. As a rule, standard units are about 15 inches tall and weighting 3 pounds.

The mounting has to be simple and take from 5 to 15 minutes. Don’t forget to see if the unit comes with all the important tools and accessories that you will need for the installation.

Replacement Cost and Filter Lifespan

Most inline cleaners don’t demand frequent replacement, but if you are on a budget, pay attention to this point.  Look at the annual cost of replacing the purifier according to the manufacturer’s recommendations and how much it costs.

The lifespan is measured in terms of the number of gallons it can purify before you need to change it. If the capacity of a filter is high, you can replace it only once in 5 years and save your money.


How to change inline water filter?

  1. Shut off water supply
  2. Relieve pressure
  3. Unscrew housing
  4. Remove filter
  5. Clean Inside of filter housing
  6. Replace filter
  7. Screw housing back on
  8. Turn on water supply and flush the filter

Are inline water filters good?

They are good for you if your water does not satisfy your demands. Modern inline water filters are the easiest way to remove odors from water and improve its taste.

How long do inline water filters last?

It depends on water quality. If you live in an area with nighly polluted water, the filter won't last long. Anyway, in most city areas, inline water filters in an average home last about a year.

What happens if you don't change water filter?

An unchanged water filter makes water with an unpleasant smell and taste. A clogged filter also affects water supply speed. If you don't replace your refrigerator filter it can damage your refrigerator

Should I filter my water?

Definitely Yes! Water filtering eliminates lead from water pipes, pesticides, and reduce chlorine byproducts level. Inline models do it without taking even a little piece of your attention.


Inline water filters are an effective and convenient decision to get tasty water. These in line water filter reviews above present only the best models for their purposes. Compare the prices, the number of contaminants removed, and the ease of installation and filter changes. As a result, you will be in a position to pick the best.

About the Author

Joshua Howard

I'm a healthy living blogger who loves to help people who care about having an eco-friendly home environment and a healthy lifestyle. With proper nutrition I helped my brother to cure gastritis and my father to normalize his blood pressure.

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