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15 Best Water Filters (Review) In 2021

Written by:
Unclutterer
Last Updated: February 12, 2021
Best Choice
ZeroWater-10-Cup-Water-Filter-Pitcher-image
ZeroWater 10 Cup Water Filter Pitcher
PRICING
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Best Value
Waterdrop-320-Gallon-Water-Faucet-Filtration-System-image
Waterdrop 320-Gallon Water Faucet Filtration System
PRICING
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Premium Pick
Santevia-Gravity-Water-System---Countertop-Water-Filter-image
Santevia Gravity Water System - Countertop Water Filter
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Show Contents
Contents
  • 1. ZeroWater 10 Cup Water Filter Pitcher
  • 2. Brita 5 Cup Water Filter Pitcher with 1 Spare Filter
  • 3. Aquagear BPA Free Water Filter Pitcher
  • 4. Clearly Filtered 10 Cup Water Filter Pitcher
  • 5. ZeroWater 23 Cup Water Filter Dispenser with Water Quality Meter
  • 6. Brita Ultra Max 18 Cup Filtering Dispenser
  • 7. Brita UltraSlim 25 Cup Water Filter Dispenser
  • 8. Santevia Gravity Water System - Countertop Water Filter
  • 9. Apex Countertop Drinking Water Filter
  • 10. PUR Advanced Chrome Faucet Water Filter
  • 11. Brita Chrome Tap Water Filtration System
  • 12. Waterdrop 320-Gallon Long-Lasting Water Faucet Filtration System
  • 13. iSpring Under Sink 5-Stage Reverse Osmosis Drinking Filtration System
  • 14. APEC Premium Quality 3 Stage Under-Sink Water Filter System
  • 15. Frizzlife Under Sink Water Filter System
Award
Brand
Rating
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Award:

Best Choice
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Brand:

ZeroWater 10 Cup Water Filter Pitcher

Rating:

10
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Award:

Premium Pick
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Brand:

Santevia Gravity Water System - Countertop Water Filter

Rating:

9
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Award:

Best Under-Sink Pick
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Brand:

APEC Premium Quality 3 Stage Under-Sink Water Filter System

Rating:

8
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Award:

Best Value
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Brand:

Waterdrop 320-Gallon Long-Lasting Water Faucet Filtration System

Rating:

7
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Award:

Budget Pick
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Brand:

Brita 5 Cup Water Filter Pitcher with 1 Spare Filter

Rating:

7

The Best Water Filter

Water filters are a necessary investment if you live in an area where drinking tap water is not recommended. And if you don’t like the taste of the minerals found in tap water, then a water filter can make it easier to swallow and help you stay hydrated.

However, even if you have decided you want to have filtered water, it is hard to know what the best water filter is for you. Is it a countertop unit, a faucet fitting, an under-the-sink filter, or a simple jug? We have reviewed many of the best options and features available to help you make a decision on which filter to buy. If you are also considering buying a water cooler for your home or office, then take a look at our best water dispensers guide. Many of these also provide filtered, hot or cold water.

1. ZeroWater 10 Cup Water Filter Pitcher

Best Choice
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Key Features

    Water filtering pitcher

    10 cup capacity

    BPA free

    Included water quality meter

    Five stage filtration

    Removes 99.6% of dissolved solids

    Certified to remove chromium and lead

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ZeroWater 10 Cup Water Filter Pitcher
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Our top choice from the best water filters comes in the shape of a ZeroWater 10 Cup Water Filter Pitcher. As you would expect from a water filter pitcher, this is easy to use, required no set up, and is affordable. What you might not expect from a simple jug is the level of filtration that ZeroWater offers you. This pitcher uses Ion Exchange Technology to remove contaminants and filters water in 5 stages. It is certified to remove lead and chromium and reduce 99.6% of other solids. Depending on the quality of your tap water, you may need to change the filter very regularly.

All you have to do to use the filter system is add water from your tap and it is ready to drink. The added feature of this water filter is the water quality meter, which means you can test the end product at any time. This meter sits at the top of the pitcher lid for easy storage.

The Zerowater jug is also fitted with a comfort grip handle and a spigot, so you don’t even need to lift it off your counter to pour water.

    Pros

    Advanced filtration

    Affordable

    Quality meter included

    Reasonable capacity for a pitcher

    Cons

    The filter needs replacing quite regularly

2. Brita 5 Cup Water Filter Pitcher with 1 Spare Filter

Budget Pick
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Key Features

    Small water pitcher

    Easy to fill and pour

    Fits on refrigerator shelves

    BPA free

    Reduces chlorine, copper, mercury, and zinc

    Filter change reminder

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Brita 5 Cup Water Filter Pitcher with 1 Spare Filter
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Our budget choice for the best water filter is a small pitcher from Brita. The Brita 5 Cup Water Filter Pitcher with 1 Spare Filter has a simple design, with a comfortable handle and pouring spout and a capacity of 5 cups. While this capacity is quite small, its space-efficient design does mean that the jug can fit easily in a refrigerator to keep you supplied with chilled water.

The Brita filter will reduce the taste and odor from chlorine and minimize any copper, mercury, zinc, and cadmium impurities from your tap water. While it doesn’t have a five-stage filter process like the ZeroWater pitcher, it does that the Brita filter lasts 2.5 times longer (around every two months) than Zerowater filters.

This compact pitcher also has an electronic indicator that will warn you when it almost time to change the filter (change soon), and then when you must change it (change now). If you are looking for an easy to use, very affordable filter for a household of one or two people, then this product is worth considering.

    Pros

    Very affordable

    Space-efficient design

    Long-lasting filter

    Easy to use

    Cons

    Small capacity

    Only removes certain chemicals/metals

3. Aquagear BPA Free Water Filter Pitcher

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Key Features

    Removes a wide range of contaminants

    Healthy trace minerals remain

    NSF standards 42 and 53 compliant

    Lifetime guarantee

    Filter lasts three times longer than competitors

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Aquagear BPA Free Water Filter Pitcher
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The Aquagear BPA Free Water Filter Pitcher claims that it removes 2000% more contaminants when compared to other brands. This filter is highly effective at removing mercury, lead, chromium, chloramine, chlorine, and fluoride, as well as over 50 organic compounds. It also leaves behind what we know as ‘healthy trace minerals’ such as calcium and magnesium.

A lovely advantage of buying this product is that it comes from a company that has a strong corporate social responsibility program, so for every purchase, you make them provide six months of clean water to someone in need. The filters can also be returned to the company, and they will recycle them.

The disadvantage of this product is the accuracy of the filter. With no indicator or measure, it is hard to know when your filter needs changing or how effective it is. Some reviews have reported that chlorine and fluoride are not reduced, whereas other reviews rate the effectiveness of the filter extremely highly.

    Pros

    One gallon capacity

    Filters are recyclable

    Supports clean water in developing countries

    Maintains healthy minerals

    Cons

    Filter is slow

    No testing or indicator for the filter

4. Clearly Filtered 10 Cup Water Filter Pitcher

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Key Features

    10 cup capacity

    Meets NSF standards

    One filter cleans 100 gallons

    Removes fluoride, lead and over 230 contaminants

    100% BPA free

    Lifetime guarantee

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Clearly Filtered 10 Cup Water Filter Pitcher
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The Clearly Filtered 10 Cup Water Filter Pitcher has a capacity of 10 cups and pledges that each filter is effective for a longer period than its competitors. On average, you can expect to change the filter every four months/ every 100 gallons.

Clear Filtered also claim that the pitcher will remove more contaminants and chemical that all of the leading top 5 brands. There are too many contaminants to list, but the highlights include fluoride, lead, chromium, mercury, and arsenic.

For a 10 cup capacity pitcher this is an expensive model, yet as you don’t have to change the filter as often, this should compensate for the initial cost. As with the Aquagear pitcher, there is, unfortunately, no way to accurately known when to change the filter, or how effective it is.

    Pros

    Long-lasting filter

    Filters over 220 chemical and metals

    Reasonable capacity

    Filters quickly

    Cons

    Expensive for a pitcher

    No filter change indicator

    Pitcher jug is not high quality

5. ZeroWater 23 Cup Water Filter Dispenser with Water Quality Meter

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Key Features

    Good value

    23 cup capacity

    Quality meter included

    Spigot operation

    Five stage filtration

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ZeroWater 23 Cup Water Filter Dispenser with Water Quality Meter
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This ZeroWater 23 Cup Water Filter Dispenser with Water Quality Meter comes with many of the same features as our best choice water filter, but with a much larger capacity. As this can hold 23 cups of water, this is one of the most generous capacity pitchers you will find, so it is excellent if you have a large household and don’t want to be continuously filling the jug. This model is also a great value for such a large capacity.

It has the standard ZeroWater quality meter that can measure the purity of the water and give you an idea of when it is time to change the filter. This quality meter is also conveniently stored above the spigot.

With its five-stage filtration process, this pitcher can remove 99.6% of dissolved solids and is certified by the NSF to remove heavy metals such as chromium and lead. Unfortunately, you will need to replace this filter quite frequently.

    Pros

    Quality measure included

    NSF certified lead reduction

    Large capacity

    BPA free

    Cons

    Spigot spout is not very durable

    The filter needs to be replaced frequently

6. Brita Ultra Max 18 Cup Filtering Dispenser

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Key Features

    18 cup capacity

    Sticker indicator to change the filter

    Spigot for easy pouring

    Easy fill lid

    Slim, modern design

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Brita Ultra Max 18 Cup Filtering Dispenser
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Brita is one of the most recognized brands when it comes to water filters, primarily due to its efficiency and durability. This model is no exception. The Brita Ultra Max 18 Cup Filtering Dispenser has a large capacity, fits in most refrigerators and has a spigot attached. As a result, you can pour water from the pitcher without having to remove it from the fridge each time.

The jug is made well, from high-quality plastic that is difficult to crack, and the lid can be folded back for simple refilling – you don’t have to take the whole unit out of the fridge and to the sink. You use the standard Brita filters with this item, and there is a sticker indicator that serves as a reminder of when it is time to change the filter, every two months. As with their other products, the manufacturers state that the filter lasts 2.5 times longer than ZeroWater products.

If you decide to purchase this pitcher, be aware that taking it apart to clean it is a little tricky, and while the easy-fill hinged lid does make your life easier, you do need to leave extra space in your fridge to use this. This might not be feasible with some refrigerator configurations.

    Pros

    Easy pouring

    Easy filling

    Fits in refrigerator

    Filter change reminder

    Cons

    Easy fill lid takes up space

    Challenging to take apart for cleaning

7. Brita UltraSlim 25 Cup Water Filter Dispenser

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Key Features

    Space efficient

    25 cup capacity

    Easy fill slide lid

    SmartLight filter indicator

    Spigot fitting

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Brita UltraSlim 25 Cup Water Filter Dispenser
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The Brita UltraSlim 25 Cup Water Filter Dispenser has the largest capacity of all Brita dispensers and can hold up to 25 cups. Ideal for large households. The ultraslim design aims to ensure this dispenser can fit in the refrigerator easily, but we recommended checking the measurements before you buy it.

This water filter has the same filtration properties as the other Brita pitchers we have reviewed, but they have added a few more, useful features. Firstly, is the SmartLight indicator, which is an LED light that glows green if the filter is working well, and flashes red when it is time to change it. This removes a lot of the guesswork of when to order a replacement.

Next is the sliding lid at the top of the unit. Unlike the 18 cup dispenser, where you had to make space in the fridge above the dispenser to be able to open the hinged lid, this particular lid slides back to open, so takes up no extra space.

    Pros

    Large capacity

    Slim design

    Replacement indicator

    Easy pour and fill

    Cons

    Slow flow rate as it filters while pouring

8. Santevia Gravity Water System – Countertop Water Filter

Premium Pick
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Key Features

    Countertop model

    98% fluoride reduction

    99% chlorine reduction

    Adds minerals

    Spigot fitted

    Award-winning multi-stage filtration process

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Santevia Gravity Water System – Countertop Water Filter
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Our premium pick for the best water filter is the Santevia Gravity Water System – Countertop Water Filter. This is a unique filtering system that has been designed to recreate the earth’s natural purification process. It uses a ceramic pre-filter and a fluoride filter to remove bacteria, parasites, fluoride, chlorine, and other chemicals. Then the water passes through mineral stones where it is oxygenated, and minerals such as calcium and manganese are added using a process similar to reverse osmosis. The aim of this water system is to restore your water to a clean, alkalized and mineralized state, but only using gravity.

You will need to replace filters but not very often – once a year for the ceramic pre-filter and every four months (approx.) for the fluoride filter. The Santevia has a capacity of 2.64 gallons and is quite large so won’t fit in your fridge, but the stone-filled interior does make it more attractive than other models, so shouldn’t be too offensive to display on your countertop.

For every purchase you make, the company donates 100days of clean water to help fight water poverty in Uganda.

You May Also Like: Best Ice Cube Trays

    Pros

    Superior filtration

    Adds minerals

    Reduces acidity

    Generous capacity

    Long-lasting filters

    Cons

    The flow rate is slow

    Cost

9. Apex Countertop Drinking Water Filter

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Key Features

    Available in several colors

    Alkaline filter system

    Removes pesticides, metals, cysts, and chemicals

    Connects directly to sink faucets

    One-year warranty

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Apex Countertop Drinking Water Filter
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The Apex Countertop Drinking Water Filter system connects directly to the kitchen faucets to produce purified, alkaline water. As it runs directly from your tap, there are no restrictions on capacity, and replacement filters are needed after 750 gallons have been passed through.

The Apex produces alkaline water, which is believed to have many health benefits, but it does also have a carbon block filter that can remove pesticide, chlorine, mercury, rust, and numerous other contaminants from your water. It works with a five-stage filtration process.

This countertop water system is very easy to fit standard faucets. Still, you should check the product descriptions to see their definition of standard faucets to ensure it is compatible with your sink. Despite it being initially straightforward to fit, replacing the filter is more challenging. We recommend following the guide, or even some customer reviews, that describe in detail how to do this successfully.

    Pros

    Easy to install

    BPA and lead-free

    Produces alkaline water

    Unlimited capacity

    Cons

    Only fits standard faucets

    Difficult to fit replacement filters

10. PUR Advanced Chrome Faucet Water Filter

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Key Features

    Attaches directly to faucets

    Designed with aesthetics in mind

    Reduces lead, mercury and other contaminants

    Tool-free attachment

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PUR Advanced Chrome Faucet Water Filter
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The PUR Advanced Chrome Faucet Water Filter is a mount filter system, another option that connects directly to your taps, with no need for a separate container. This model is certified to remove 99% of lead and more contaminants than other brands.

This attachment is simple to connect to your faucets, and no tools are needed to achieve this, but you should verify which type of faucets it is compatible with before purchasing. There have been several reports of leaks around the taps, and this may be because of compatibility issues.

As per the product descriptions, one PUR filter can provide up to 100gallons of water before needing a replacement (approximately every three months). This is equivalent to 750 standard bottled water containers, making it a great investment to save money and the environment.

    Pros

    Good value

    Easy to install

    Removes 99% of lead

    Long-lasting filters

    Cons

    Need to remove before running hot water

    Reports of leaking

11. Brita Chrome Tap Water Filtration System

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Key Features

    Attaches directly to a faucet

    Tool-less installation

    Removes 60 contaminants

    Filter change reminder

    One-click filter replacement

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Brita Chrome Tap Water Filtration System
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This faucet water filter comes from Brita and is a highly affordable option for unlimited filtered water. The Brita Chrome Tap Water Filtration System is effective at reducing 60 contaminants, including chlorine, lead, asbestos, and other unwanted chemicals.

One advantage you get with this item compared to faucet attachments is the filter change indicator. This will tell you when it is time for a replacement, which should be approximately every four months. When you do have to change the filter, the one-click system makes this incredibly user-friendly to do.

As with all similarly designed products, ensure that you check your faucet style for compatibility. You should also expect that the water pressure from your tap will decrease when you fit this filter.

    Pros

    Very affordable

    User-friendly design

    Reputable Brita filter

    Cons

    Must remove before using hot water

    Water flow is slow

12. Waterdrop 320-Gallon Long-Lasting Water Faucet Filtration System

Best Value
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Key Features

    NSF certified to reduce chlorine and lead

    320 gallons of clean water per filter

    Carbon fiber water filtration

    Fast filtration – 4 bottles in one minute

    Easy switch between filtered and regular water

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Waterdrop 320-Gallon Long-Lasting Water Faucet Filtration System
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The Waterdrop 320-Gallon Long-Lasting Water Faucet Filtration System is our best value choice filter for water. It attaches quickly to your faucets and is NSF certified for lead-free material and chlorine removal. Its Activated Carbon Fiber filter can also reduce fluoride levels.

In comparison to other faucet fitted water filtration systems, the Waterdrop has a longer product lifespan. You should only need a replacement filter after 320 gallons of clean water has been dispensed. There is also a high flow design of 0.5 gallons per minute, so you won’t have to wait for a fresh glass of drinking water.

One added feature of this model is that you can switch off the filter when you run hot water, rather than having to remove the filter completely. This protects the carbon fiber filter and means you don’t have to keep messing around with installation.

    Pros

    NSF certified

    Removes lead, fluoride, and chlorine but retains healthy minerals

    ‘Off’ switch for using hot water

    Long-lasting filter

    Cons

    Not as easy to install as other products

13. iSpring Under Sink 5-Stage Reverse Osmosis Drinking Filtration System

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Key Features

    High capacity reverse osmosis filter

    Removes up to 99% of 1000 contaminants

    Do-it-yourself installation

    Premium-quality components

    One-year guarantee

    Highly compatible

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iSpring Under Sink 5-Stage Reverse Osmosis Drinking Filtration System
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The iSpring Under Sink 5-Stage Reverse Osmosis Drinking Filtration System is one that is fitted underneath your sink, directly to the pipes. The five-stage layered filtration system in this model works around reverse osmosis technology, carbon blocks, and sediment filters. There isn’t much that will pass through this system! Once installed, you will get a bottle-water quality flow from your faucets, with a capacity of 75 gallons per day. This is more than enough for a large family.

The iSpring advertises DIY installation, accompanied by guides and videos. While this is true, you will need to be a little handy with tools and DIY before attempting installation. Luckily the company provides exceptional live support to talk you through the process if needed.

As with all under-sink filtration systems, the various filters will need to be changed at different times, so you will need to keep on top of this. This product does require a significant initial investment, but if you are looking for a long-lasting system that you will keep for many years then in the long-run, it is more cost-effective than buying bottled water.

    Pros

    Five-stage reverse osmosis filtration

    NSF compliant

    Live support for installation

    Durable

    75 gallon per day capacity

    Cons

    High cost

    Different filters need changing at different times

14. APEC Premium Quality 3 Stage Under-Sink Water Filter System

Best Under-Sink Pick
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Key Features

    Super capacity filters

    Removes chemicals, not TDS removal

    One-year guarantee

    Three-stage filtration

    Lead-free chrome faucet included

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APEC Premium Quality 3 Stage Under-Sink Water Filter System
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The APEC Premium Quality 3 Stage Under-Sink Water Filter System comes with a high price tag, but it is constructed with very high-quality materials and includes a full, lead-free chrome faucet, so you don’t need to worry about it being compatible with your kitchen taps. The water flow is also above average for similar filtration systems.

There is a three-stage filtration process in this product, with a sediment filter followed by two different carbon blocks. These stages remove dust, chlorine, and any unpleasant tastes and odors, but retains potassium, calcium, and magnesium. If you are looking for a product to reduce your total dissolved solids (TDS) count, then this is not the best product for you, but it will leave you with high quality, alkaline drinking water. Fluoride and lead will also not be removed.

    Pros

    Filter change every 12 months

    Three stages of filtration

    No wasted water (no need to flush filters)

    Maintains minerals

    Cons

    High cost

    Does not remove fluoride or heavy metals such as lead

    Space for a separate faucet is needed

15. Frizzlife Under Sink Water Filter System

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Key Features

    99.99% lead removal

    Two-stage purification

    Fits ½ and 3/8 inch cold water lines

    Easy installation

    2.0gpm water flow

    Cartridges last for 1600 gallons

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Frizzlife Under Sink Water Filter System
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The Frizzlife Under Sink Water Filter System is approximately half the price of many other under sink options, but it is still highly effective. The two-stage purification process will eliminate lead, heavy metals, chlorine, carcinogens, rust, and mercury plus numerous other contaminants. Essential minerals (calcium, potassium, sodium, and magnesium) remain. This is why you won’t see a reduction in TDS.

Compared to other under sink modes, the Frizzlife is one of the best filters for water in terms of installation and replacing. With a built-in, automatic shut-off valve, you don’t even need to turn the water off when changing the filter. The filter cartridges are also half the price of similar alternatives.

There aren’t many downsides to this product, apart from it not being certified by the NDF, so you will only be able to validate the filtration claims through testing.

    Pros

    Easy to install

    Quick to replace filters

    Very affordable

    Can be attached to fridge lines

    2.0gpm flow

    Cons

    Not NDF certified

Features To Consider With Water Filters

Filtering Method

The filtering method you need will largely depend on your water supply and therefore which impurities or heavy metals you need to remove.

If you suffer from hard water, with calcium and magnesium deposits, then water filters with the Reverse Osmosis method are best. The pores in a Reverse Osmosis filter will remove dissolved metals and impurities. This process is one of the most effective treatments available.

You may also find water ionizers that are designed to produce alkaline water. Many people believe that alkaline water has numerous health benefits, but water ionizers will not remove any contaminants.

the best water filter

Filter Lifespan

The lifespan of the best water filters will vary according to the type of system you invest in. Regular replacement is necessary to maintain correctly filtered water.

Whilst you should compare the lifespan of the individual models once you have decided which system you prefer, the below guidelines should help.

A pitcher or dispenser will need the filters changing at least every six months, but much more often if you use it regularly. Some of these filters will only last for one month. If you get filtered water from a faucet attachment then you can expect to replace the filter every 4-5 months. A countertop filter lifespan will vary considerably but the average is around every 4-6 months. An under sink system should have the filters replaced every 9-12 months.

Maintenance

If you are buying a pitcher, then there is very little maintenance involved other than the frequent replacement of a filter. If, however, you are buying an under the sink system then it is recommended to get them serviced every quarter and replace the filters every year. You should factor these costs into your purchasing decision.

the best water filter

Portability

If you are choosing a water dispenser or pitcher, then it is essential to consider the portability of the model you select. Some dispensers can stay in one position and be easily topped up with a jug of water, so portability is not an issue. However, if you opt for a model that you need to fill directly from the tap then the ability to lift and move it is very important. A large capacity pitcher may be attractive, but if you can't lift it once full, or carry it back to the fridge, then this will be a huge inconvenience.

Size

The water capacity largely determines the size of a water filter, but there is a significant difference in terms of the design and shape of water tanks. You should measure the size of the area where you plan to position the filter and then seek to find a model that has the appropriate dimensions.

the best water filter

Water Capacity

Capacity is essential when it comes to pitchers and dispensers, but less so for filters that fit on a faucet or under the sink. The best water filters are not always those with the highest capacity, but if you have a large household then it is best to opt for a model that you don't have to continuously fill up.

Water Taste

Many people claim that drinking water tastes better when it has been through a filter, as this removes elements that make it less palatable. Of course, the taste is subjective, so there is no guarantee which filter makes water taste best!

Any filtration or purification system will remove chemicals, metals, or bacteria, none of which make water particularly pleasant to drink. Once you have clean water, free from these contaminants, it will taste much nicer.

the best water filter

Water Filter FAQ

Q: Which type of water filter lasts the longest?

A:

This will vary according to the exact model but generally speaking an under-sink filter will last the longest.

Q: Can you put hot water through a water filter?

A:

Hot water should not be used in a water filter. The heat can damage the delicate structure of a filter's mesh, reducing its effectiveness.

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