10 Best Inline Water Filters (2021 Reviews)
There are many quality inline water filters on the market today, making it very challenging to arrange them in any fair order of superiority. In light of this, we opted to rank them according to their areas of specialization in our review. We realize it is more likely to pick the best water filter when considering its utility against your prevailing needs.
In a hurry? Here’s the test winner after 10 hours of research:
10 Best Inline Water Filters – Overview
Here are the top 5 picks (keep scrolling for more details and picks 6-10).
1. Best Inline Water Filter for a Refrigerator: Whirlpool’s everydrop Ice and Water Refrigerator Filter
This refrigerator water filter employs triple filtration technology, starting with particle filtration where most contaminants are stopped, then microfiltration, which captures finer particles. Finally, absorption filtration, where microscopic contaminants are absorbed.
It can reduce up to 28 contaminants, including waterborne parasites, soluble lead, chlorine, pesticides, and pharmaceuticals. It also gets rid of the odor and chemical taste from water treatment. It has been accredited NSF standards 42, 53, and 401 to back up these features.
The filter is versatile because it is original equipment manufactured for a few refrigerator brands such as Whirlpool, Maytag, KitchenAid, Amana, and Jennar. It can function as a replacement filter for other similar fridges.
2. Best Inline Water Filter For Your RV: Camco’s TastePURE Inline RV Water Filter
- Safe water matters: GAC (Granular Activated Carbon) filtration greatly reduces bad taste, odor, chlorine, and sediment
It can be attached to any standard gardening or water hose, which means you can use it to enjoy that bottled water taste wherever you are. This is why it is popular for RVs, boats, and pets. It comes in a UV-resistant case which makes it outdoor-ready.
They use granular activated carbon filtration to eliminate the residual odor and bad taste of water treatment and reduce chlorine and water-soluble lead content in the drinking water.
It is infused with Kinetic Degradation Fluxion (KDF) material to prevent bacteria growth when the filter is not in use. It initiates a redox process that renders the bacteria inactive.
The filter has a 20-micron fiber barrier that keeps the sediment out of your RV tank, protecting it from clogging and abrasion. Your hose is also protected from kinking as you use the filter by the heavy-duty flexible hose protector which comes with the package.
3. Best Inline Water Filter for the Shower: AquaBliss High Output Revitalizing Shower Filter
- DAY 1 - IMMEDIATELY BEGINS REJUVENATING SKIN, HAIR & NAILS: HARD, chlorinated, chemical ridden water causing itchy skin, flaky dandruff, eczema, bone-dry hair and brittle nails? Let our UNIQUE,...
This filter is perfect for the shower because it actually participates in nourishing your skin, hair, and nails. It contains ceramic beads which infuse Vitamin C and beneficial revitalizing minerals in the water and energizes it with oxygen. It rescues you from brittle nails, dry hair with flaky dandruff, and itchy dry skin associated with hard water.
The cosmetic abilities do not take away its efficiency in reducing chlorine, bad odor, pesticides, and scale build-up in both hot and cold water.
All this is made possible by their patented multi-stage health filter that reduces harmful contaminants, restores the benefits, and protects your shower head from any contact with the debris.
The easy-to-swap shower head filter replacement lasts longer than a regular filter replacement and is compatible with all shower types, whether fixed, handheld, or customized.
4. Best Under Sink Inline Water Filter: Filtrete Advanced Under Sink Water Filtration System
- HEALTHY LIVING FILTRATION LEVEL - This system reduces chlorine taste & odor as well as microbial cysts
The installation does not choke the flow of water to your faucet, it will maintain the full flow, and you will not feel a reduction in water pressure.
It ensures that the water flowing out of your faucet is better tasting by eliminating the chlorine odor and chemical taste. It is NSF Standard 42 certified to back up this claim, meaning it was tested by experts and passed.
Even the finest particles of rust, sand, soil, and other sediments are filtered out by the 0.5 micron rated filter media along with any microbial cysts which may have persevered through water treatment.
It installs easily below your sink and is the least disruptive. It only requires a quarter turn when fitting and replacing and allows you to retain your existing faucet, sparing you the cost and logistics of replacement
5. Most Versatile Quality Inline Water Filter: Watts 20,000 Gallon Inline Water Filter
- Designed for use with refrigerators, ice-makers, RV, campers, boats, water fountains, water coolers, and commercial coffee makers
This all-around workhorse has been designed to filter your water irrespective of the existing plumbing as it can be used under the sink, on your RV, camper, boat, in commercial coffee makers, water coolers, ice makers, and refrigerators.
It can filter up to 20,000 gallons before it needs replacement which is enough capacity for various tasks. It will connect to any water supply using a quarter-inch line and comes with two brass connectors to facilitate this.
It removes lead, sediments, and the unpleasant chemical taste and odor from water using its KDF filter. WQA confirmed this by awarding it NSF/ANSI standards 372 and 42.
6. The Best Premium Inline Water Filter: Culligan Easy-Change Under Sink Filter System US-EZ-4
- Provide your family with visibly clean, great-tasting water for drinking, cooking and more
The Culligan premium filter facilitates crisp, clean, and clear water that is healthy, safe to drink, and has no residual taste or odors from chemicals or water treatment processes. It does this by handling a number of contaminants that got it certified NSF/ANSI standards 42 and 53.
It reduces microbial cysts, water-soluble mercury and lead, volatile organic compounds, chloramine levels, and the chemical taste and odor that come with chlorine. It also absorbs chemicals like MTBE with its offensive taste and odor (the jury is still out on whether it is also a carcinogen). The turbidity caused by the presence of the above will also disappear in the process.
Their cartridges are easy to change, and they have a selection of cartridges to choose from, depending on the specific contaminants your water has. Once the system is installed, a replacement can easily be done without tools.
7. Best Inline Water Filter for the Whole House: 3M Aqua-Pure Whole House Scale Inhibition Inline Replacement Water System
- HELPS PROTECT HOT WATER HEATERS: Polyphosphates, included in this product, help to inhibit scale build up in hot water heaters (both standard (gas or electric) and tank less styles) and boilers; Helps...
It prevents scale build-up in your water heaters and boilers, which extends their life, as well as the pipes and plumbing fixtures through which the hot water will run, like faucets and showerheads.
It contains polyphosphates that minimize coloring, corrosion, scale deposits, and chlorine demand, stabilizing the water quality in the process. Polyphosphates bind with soluble metals to maintain their solubility in water, preventing them from scaling. They also form a protective layer on your pipes.
It is easily installed in your existing plumbing pipes with its stainless steel head which is built to fight corrosion and has a long service life. It does not choke the water flow rate to your outlets in the process, so there is negligible pressure loss.
The cartridges are easy to change, meaning the system is easy to maintain, and you will not suffer through it.
8. Best Inline Water Filter for Sediments: Culligan Whole House Heavy Duty Water Filtration System
- Whole house water filtration system with 1" stainless steel reinforced inlet/outlet connectors
It traps sand, silt, rust, and other sediments which are abrasive and corrosive and may clog your pipes and damage your appliances. It also prevents the formation of scale, which is equally detrimental to your plumbing and appliances and can lead to irreparable damages and inefficiency.
Like all Culligan products, it comes with a cartridge selection tool that allows you to pick the most applicable depending on your water situation.
It has an inbuilt filter life monitor which will alert you when it is time to change it
The stainless steel reinforced outlet/inlet allows you to plug it at the main point of entry so it can filter all the water entering your home. It is heavy duty with extended service life.
9. Most Ecofriendly Inline Water Filter: FRIZZLIFE MK99 Under Sink Water Filtration System
- [Two-stage Advanced Water Purifier With 0.5 Micron]: The Frizzlife MK99 Water Filtration System includes a TWO-STAGE High precise compound filter, which has a unique technology that removes over...
Their design results in the lowest environmental impact because you only replace the core of the filter cartridge and retain the housing when replacing the filter. This reduces the need for plastic disposal and production, which is great for sustainability and net carbon reduction.
You can replace the filter cartridge without shutting off the water source as the filter cap has an inbuilt shut-off valve. It is easy to install with a simple twist that does not require tools.
It provides healthy, clean water devoid of turbidity and nauseating odors and taste courtesy of its two-stage compound filter.
It has been certified by the IAPMO Research and Testing to meet the standards for NSF/ANSI 42, which means it reduces chlorine in the water and gets rid of the associated odor and taste and NSF/ANSI 53 showing it has been confirmed able to reduce soluble lead. Excess ingestion of lead leads to health problems.
10. Best Budget Inline Water Filter: Amazon Basics Inline Water Filter
- 20-micron sediment filter with KDF technology for healthier, cleaner, better-tasting water; includes 2 inline water filters (flexible hose protector not included)
These filters are currently being offered in packs of 2 for the price of 1, which is great value for money. They can filter up to 1,350 gallons of water and connect to any standard water hose or faucet, meaning their application is versatile and not limited by space or location.
They have KDF technology which prevents bacterial growth when they are not in use, keeping them healthy throughout their lifespan. They come with a 1-year limited warranty which grants extra peace of mind.
Identifying the Best Inline Water Filter for Your Home
Because all these water filters are great in what they do, a little confusion may arise when it’s time to make the choice. We have compiled a few considerations which should go a long way in helping you narrow down.
How the Filter Will Plug Into Your Water Supply
This is a combination of many factors, including how much filtered water you need, the purpose of the water, your existing water system, and the amount of modification you are allowed to or are willing to undertake on the house.
If the filtered water is exclusively for drinking, you can use an inline refrigerator filter or a pitcher water filter and drink from the dispenser. However, a large family will get more value from a water filter system than a refrigerator dispenser.
You can mount the filter on your faucet or integrate it in the faucet depending on your appetite for modification to make filtered water accessible for other tasks as well.
There are also under the sink and whole house treatment filters for higher consumption households if you want to almost exclusively use filtered water in your home for one reason or another. You should consider high-capacity filters for these kinds of loads.
What Does the Filter Remove?
There is a vast array of contaminants attacked by water filters ranging from microorganisms and other pathogens, organic and inorganic chemicals, water-soluble heavy metals, disinfection byproducts, rust from pipes, and other sediments.
Inline water filters usually specialize in one or a few of them. The positive thing is all these water contaminants are hardly present at the same time in your water. If you keep abreast of your local and national water analysis reports, which are public records, you will get to know which ones are prevalent in your area.
With this information, you will easily pick a water filter that targets the specific contaminant you need to remove from your water.
Read the fine print and the filter packaging to get the correct information. Look for legitimate unbiased certifications from independent bodies with authority in water treatment. These will give reassurance that the product billing has been tested and verified true.
Some of them actually have a database from which you can check if the product is listed for what it claims it can do. Here are some reliable accrediting bodies are known for setting and monitoring water treatment equipment and process standards:
- National Science Foundation (NSF)
- American National Standards Institute (ANSI)
- Water Quality Association (WQA)
- American Society for Plumbing Engineers (ASPE)
- International Association of Plumbing and Mechanical Officials (IAPMO)
Cost of Ownership
Look at the bigger picture, which includes the total cost of acquisition. This is the purchase price added to the installation costs (whether you need to hire a professional and if you need to replace any existing infrastructure like faucets and pipes).
Also, factor in the ease and schedule of maintenance, including changing parts like filter cartridges and their cost. Efficiency also has a bearing on the overall cost because the more efficient it is, the less maintenance is required and the longer it will last. This is why you need an inline water filter that is suited to your specific usage.
Weigh these against the perceived benefits of each system to determine which one has the highest net returns for your purposes.
No filter is invented yet that is 100% effective in removing all water contaminants from your water source. They all have their strengths and specialization. You need to have a clear vision of what you require your filter to do and the prevailing conditions so that you can pick the most functional inline water filter for your circumstances.