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CuZn UC-200 Under Counter Water Filter Reviews

The CuZn UC-200 is one of the best under sink water filters on the market. What makes it highly popular is its impressive filtration features, advanced design, quality, super efficiency and convenience all at a relatively fair price. More importantly, it has the most long-lasting filter offering the highest capacity on our list.

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Filtration Performance

The CuZn UC-200 model utilizes a 3-stage filtration process which consists of a micro sediment membrane, KDF-55 filtration media, and virgin acid washed catalytic carbon filtration media made from coconut shell carbon.

This impressive filtration process and advanced materials remove a wide range of contaminants from your water both inorganic and organic.

The first media which is the micro sediment membrane helps clear out sediments and tiny particles from the water.

The KDF-55 media and catalytic coconut shell carbon combination, on the other hand, work effectively to remove many different kinds of harmful chemical contaminants found in the water and the pipes.

The first main items they eliminate are chlorine, chloramines and chlorine byproducts like chloromethanes and bromoform. The robust catalytic coconut shell carbon filtration media is also capable of reducing most types of pharmaceutical and perfluorinated (PFOA) compounds.

It can reduce Glyphosate too and several volatile organic compounds found in municipal water.  In short, it will basically remove almost all chemical contaminants that often affect the taste, odor, and quality of water.

The UC-200 KDF-55 filtration media stage, in particular, does a great job of reducing up to 98% of all the water-soluble cation heavy metals like lead, chromium, nickel, mercury, cadmium and other dissolved metals.

Another commendable thing about this unit’s filtration process is that it purifies the water selectively. It will not remove the beneficial hardness minerals such as calcium and magnesium. Therefore, you get clean filtered water with the healthy minerals present.

Bacteriostatic Filtration System

One of the best features of the CuZn UC-200 model is its bacterial growth prevention. It is bacteriostatic which means bacteria can’t grow within the unit like is the case with carbon only filters which are susceptible to building up of microorganisms over time when not changed frequently.

The inclusion of the KDF-55 media helps create a bacteriostatic environment in the unit which limits any possibility of microorganism growth and also kills any bacteria present in the water.

By direct electrochemical contact and flash formation of hydrogen peroxide and hydroxyl radicals, this KDF redox media causes cellular damage to the microorganism lingering inside the unit by disrupting their ability to function thereby destroying them completely.

As such, there’s almost zero chance of bacteria, mold, and algae building up within the system thereby preventing any further contamination of the water and the potential spread of water-borne diseases.

Capacity and Efficiency

The CuZn UC-200 offers an incredibly high capacity as it is able to filter a maximum of 50,000 gallons of water on demand throughout its lifespan. Basically, you will be using it for nearly 5 years or even longer if it’s only for drinking water and cooking.

The unit is also built to withstand a great deal of pressure. It’s capable of handling up to 130 psi operating pressure which is a big bonus considering that the city water pressure in most homes is around 60 psi.

The flow rate is equally high as the system can produce about 2 gallons of filtered water per minute and the best part is no wastewater is generated in the process, so it’s 100% water efficient.

Installation and Maintenance

Installing this CuZn system is super easy. All the necessary parts required to hook it up under your home or office sink are provided.

The unit is designed to filter cold water from the municipal/city water treatment supplies alone. It’s not recommended for use with private well water suppliers. 

A separate dedicated faucet for the filtered water is not required since it can work with an existing cold water faucet. However, if you prefer to install it, the manufacturer provides a complementary alternative installation kit for the dedicated filtered water faucet setup upon request at no additional cost.

Almost no maintenance is needed because the filter it uses is long-lasting. You will only have to change the system after around 5 years and the process is simple as the first time you install it.

One downside we noted with this unit is that it does not consistently reduce a high percentage of fluoride. It reduces the levels by just 20 to 30% on average.

It’s also not the right choice for dealing with excessively hard water issues brought about by extremely high mineral content since most of these minerals are allowed to pass through the filter.

Overall, this CuZn UC-200 model is a top under sink water filter that offers reliable general purification of municipal water issues. If you want a more basic yet effective low maintenance and long-lasting water filtration system, then this an option worth investing in.


  • Removes a wide range of organic and inorganic contaminants
  • Kills and restricts the growth of bacteria and mold within the system
  • Incredibly high capacity (50,000 gallons) and flow rate (2 GPM)
  • 100% efficient with zero wastewater generation
  • Setting it up is a breeze and almost no maintenance needed
  • Long-lasting filter offering up to 5 years of service
  • Comes with a 5-year limited warranty


  • The “in” and “out” flow not indicated on the unit
  • Filters only municipal water

Read moreCuZn UC-200 Under Counter Water Filter Reviews

Frizzlife MK99 1-Stage Under Sink Water Filter Reviews

The Frizzlife MK99 takes the second spot on our list and like CuZn UC-200 model above, this is an under sink water filter that has earned high ratings from many different users due to its fantastic performance and water flow production after installation.

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Filtration Performance

The filtration system of the Frizzlife MK99 is a 2-stage process involving a sediment filter and an advanced carbon filter that work together to effectively eliminate contaminants in the water.

The 1st stage employs a pleated polypropylene (PP) sediment filter with 5-micron precision and it clears out particles and sediments such as silt, sand, rust, and scales from the water.

The filter is 100% constructed using polypropylene media hence it won’t degrade even when exposed to many different chemicals.

On top of that, it’s made up of multiple membrane layers that are thermally bonded together, and as such, it provides consistent pore sizes and a much better dirt-rejection capacity than other sediment filters.

The 2nd stage consists of a highly effective carbon block filter which does the heavy lifting removing more than 58 contaminants commonly found in unfiltered water.

This advanced carbon filtration media with 0.5-micron precision which is by far smaller than most other similar under sink filters can remove up to 99.99% of chlorine, lead, chloramines and other chemical contaminants. In the same process, unpleasant tastes and odors are also cleared out of the water.

Volatile organic compounds, carcinogens, chromium 6 and heavy metals like mercury are all removed by this filter too. If you are looking for a unit that’s good at clearing out heavy metals, then this will make an excellent choice.

A key feature we also liked about the MK99 is that it’s intentionally designed such that it leaves the essential minerals intact. Therefore, calcium, potassium, magnesium, and sodium which are all important building blocks for achieving a healthy body will remain in the water while it strips the other contaminants.

Capacity and Efficiency

The filtration capacity of this MK99 is not the highest out there but it’s pretty decent. It offers a filtration capacity of 5000 gallons for chlorine and 1000 gallons for lead reduction.

The overall capacity is 1,600 gallons which means it can serve you for up to 2 years depending on your feed water quality and daily usage. However, Frizzlife recommends changing the filter after every 6 to 8 months to ensure better filtration throughout.

The unit is generally super-efficient like most other under sink water filters since it produces no wastewater. Furthermore, although it delivers water on demand, the flow rate is quite high.

It can deliver 1.5 gallons of filtered water per minute at 40 psi and up to 2 gallons at the standard municipal water pressure of 60 psi, so no long waiting times when filling a large container.

Installation and Maintenance

Featuring the quick twist-in installation design, setting up this unit and replacing the filters is easy-peasy. It will take less than 5 minutes to install it and the package comes with all the supplies required to complete the installation including the system mount, tubing, and a plastic filter wrench.

The unit can fit either the 1/2” or 3/8” cold water line under your sink hence no extra adaptors needed and it connects directly to any standard faucet.

Alternatively, you can order one with a dedicated faucet if you prefer to have a separate dispenser for the filtered water but you will have to drill another hole in your sink to accommodate it.

As I mentioned earlier, the manufacturer recommends replacing the filter every 6 to 8 months. It’s not the longest lifespan but the good thing is that replacing the filters is really cost-effective.

Unlike other brands, the unit designed with the core filter cartridge placed inside the plastic housing. Therefore, you simply change the inner cartridge alone without tossing out the housing which cuts down the cost of replacing the filter periodically.

The filter head itself has a built-in shut off valve and this is a thoughtful addition that will allow you to carry out the filter cartridge replacement without having to turn off the water supply which is very convenient.

On the downside, besides the filter cartridge having a short lifespan, this model although is designed for use with only city water. It’s not for heavy-duty filtration needs like purifying totally untreated water from a well source.

With that said, the Frizzlife MK99 might not have the highest capacity, but it does provide an effective filtration system that’s capable of removing many contaminants and producing clean and better-tasting water.


  • Filters out contaminants down to 0.5 microns
  • Leaves essential minerals intact in the water
  • Decent filtration capacity of up to 1,600 gallons
  • Has a high flow rate of about 24 gallons per minute
  • Installation and filter replacement is quick and easy


  • Shorter filter life although much cheaper to replace than other brands
  • Designed to purify only city water

Read moreFrizzlife MK99 1-Stage Under Sink Water Filter Reviews

Woder WD-S-8K-DC Under Sink Water Filter Reviews

The Woder WD-S-8K-DC, just like the CuZn-200 above is a really popular under sink water filter and this is mainly due to its simplicity and effective filtration ability.

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The other thing that makes it very attractive to many is the large capacity it has, in fact, it’s the second-highest in this list. If you are looking for a compact unit that can give you good value for your money, then this may be the best choice for you.

Filtration Performance

Although quite small, this powerful water filter is extremely capable of reducing a huge percentage of contaminants that water treatment facilities fail to remove as well as those picked up along the way.

The filtration media the system uses is a special blend of granulated carbon and silver that have been grounded to microparticles, screened, and then blended together rather than layered.

This filter design provides a large surface area hence ensuring optimum contact time with the water which extremely boosts the absorption ability of the filter making it super effective at extracting contaminants from the water.

It will be able to remove 99.99% of chlorine and lead plus many more other contaminants like VOCs, carcinogens, chloramine, as well as heavy metals such as mercury and chromium 6.

It will filter out turbidity too and get rid of that unpleasant odor and tastes often caused by most of the chemical contaminants in the water. In addition to that, the Woder 8K is bacteriostatic, so it will prevent the growth of bacteria, mold or any other microorganisms within the filter.

Its special blend of media also gives it a selective filtration ability which clears out harmful impurities but keeps all the essential minerals that are vital to our health, including calcium, magnesium, and potassium. Therefore, you and the family will get to enjoy a healthy and great-tasting purified water.

Capacity and Efficiency

This Woder WD-S-8K-DC is an under sink water filter with a large capacity as it can process up to 8, 480 gallons of water before needing a change of filter which is the second-highest capacity on this list.

It means it can last more than 3 years with normal use hence it’s ideal for long-term use. If you are not a fun of changing filters frequently, this will fit you right. 

Regarding the flow rate, the filter will deliver around 2 gallons of water a minute at 65 psi which is the average rate of most under sink filters. The best part is the fact that it uses microparticles means that it will be able to remain optimally effective while purifying your water for those 3 years.

However, this will only be possible if you make sure you use it with municipally treated cold water alone or at least disinfected water, not well water.

Installation and Maintenance

With its simple and compact design, the installation process of the Woder 8K is easy and straightforward. It shouldn’t take more than 5 minutes. The package features all the parts you need including the direct connect hoses.

You just mount it where you want and connect it directly to your 3/8” cold water line under the sink and the existing standard cold water valve faucet. You don’t need a separate dedicated faucet to dispense the filtered water.

Low maintenance is another advantage you will get from this filter since it can for about 3 years before requiring changing and it has a built-in valve to allow you to perform the replacement without turning off the water. You will have to replace the whole thing though.

To sum it all, Woder WD-S-8K-DC is a very capable under sink water filter that will give you amazing value for your money, especially because of its high capacity. It’s a suitable choice for city water and its construction feels solid and strong, so you are assured durability.


  • Effective filtration process that’ll remove 99% of contaminants
  • Eliminates bad odor better and prevents microorganisms build-up
  • Uses selective filtration technology which keeps essential minerals
  • Relatively high capacity that can serve you for more than 3 years
  • Easy to install and requires low maintenance
  • Comes with a 1-year limited warranty


  • Does not remove fluoride
  • May reduce water pressure a bit

Read moreWoder WD-S-8K-DC Under Sink Water Filter Reviews

APEC Water CS-2500 Under Sink Water Filter Reviews

Our next under sink water filter is the APEC CS-2500 water filtration system. This is a strong but more basic under sink water filter from APEC Water built to provide dependable filtration at an affordable price. It’s a good starting point for those who are looking for a simple, budget under sink water filter for improving the quality of their city water.

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Filtration Performance

The APEC CS-2500 filtration process relies purely on a single filter cartridge for the removal of several different kinds of contaminants commonly found in water supplied from municipal treatment plants.

It utilizes a carbon block filter which may seem like a standard carbon filter but it does offer a respectable contaminant rejection rate. This highly porous medium is able to eliminate up to 97% of chlorine, bad tastes, odors and various other chemicals such as herbicides and pesticides from the water.

The media is also capable of removing 90% of all lead plus other heavy metals while ensuring that essential minerals like calcium and potassium remain in the water. It’s a much ideal filter for dealing with lead or anything chemical that contaminates your water.

Besides that, it’s designed to be bacteriostatic and as such, it will as well remove heterotrophic bacteria and inhibit them from growing or reproducing within the unit which is a big plus in preventing any possibility of further contamination happening inside the filter.

Capacity and Efficiency

Like the APEC WFS-1000, the exact filtration capacity of this APEC CS-2500 model has not been clearly specified but according to APEC, its maximum contaminant reduction capacity is around 5,000 gallons and that should allow the filter to go for up to 12 months before you can change it.

The water flow rate is 1.67 gallons per minute which is good enough to ensure you get filtered water on-demand quickly plus you won’t notice any drop in water pressure when using the filter.

Installation and Maintenance

The best part of this unit aside from its filtration ability is that it offers a trouble-free installation. Using the provided standard 3/8” connector, you screw in the inlet line from the filter directly to your cold water supply valve and then screw in the outlet line to your existing faucet stem.

It’s that easy and you don’t require a separate faucet. The lines will handle pressures of up to 125 psi thanks to the twist connection design and they are likely to leak under high pressure compared to push-in hoses.

This quick twist connection design also enables easy filter replacement which you won’t have to do more frequently as the filter cartridge lasts up to 12 months without change out. The lifespan may vary though depending on the quality of water going into the unit.

Generally, there’s little to worry about this under sink water filter. It’s a basic and economical water filtration system suitable for removing chlorine, heavy metals and a few other contaminants from treated municipal water. Due to its compact size as well as easy installation, it can be a perfect choice for RV owners.


  • Removes a good number of contaminants
  • Destroys and prevents bacterial build-up
  • Essential minerals remain in the filtered water
  •  Decent flow rate and filter lifespan
  • Easy to install and to replace the filter cartridge


  • Does not remove fluoride
  • Cannot be used with well water

Read moreAPEC Water CS-2500 Under Sink Water Filter Reviews

Culligan US-EZ-4 EZ-Change Undersink Water Filter Reviews

The US-EZ-4 is one of the three models in Culligan’s US-EZ series with the others being the US-EZ-1 and US-EZ-3. Among the three, the Culligan US-EZ-4 stands out the most due to its high filtration performance. This and several other nice features you are going to see are what earns it a spot on our list of the best under sink water filters.

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Filtration Performance

Although it’s just a single-stage filter system, this Culligan US-EZ-4 model is equipped with a super-effective filter cartridge which is more than capable of getting rid of most of the common contaminants and impurities found in water. It offers almost the same level of filtration ability as any other top 2-stage or 3-stage under sink water filter system.

The unit utilizes a 0.5-micron high-tech carbon block filter media which has been tested by NSF International and certified to NSF/ANSI standard 42 as well as standard 53.

These certifications first mean a significant reduction of chlorine from the water. It will clear out up to 97% of chlorine along with bad tastes, odor, and turbidity, and as well remove nominal particulate class 1 which includes all particles that are as small as 0.5 microns.

Unlike the US-EZ-3 and US-EZ-1, the US-EZ-4 will also eliminate chloramines from your water which is really commendable for a one-stage unit.

Most under sink water filter systems have standard carbon filters that only filter out chlorine but will not remove the very persistent chloramine disinfectant used by municipal water treatment plants.

Besides that, this filter will remove other harmful chemical contaminants like MTBE, dozens of VOCs and perfluorinated chemicals such as PFOA and PFOS.

The US-EZ-4 can as well remove cysts like giardia and cryptosporidium plus lead, mercury, and several other heavy metals. On average, it will reduce up to 99% of lead in the water.

As you can see, while it’s not a 3-stage system, it’s still a highly effective filter that can address many common contamination issues found in municipal water supplies.

Furthermore, it does leave behind some of the healthy, natural minerals in the water hence the water delivered to the faucet is clean and has good taste.

Capacity and Efficiency

When it comes to capacity, the US-EZ-4 falls on the lower end like the Aquasana AQ-5200 above. It can process up to 500 gallons of water which is just about average and means it will work for around 6 months depending on your usage. However, if you use not more than 2 gallons a day, it can go up to 8 months.

The flow rate is on the lower end too as it delivers 0.5 gallons per minute at 60 psi, but again if your daily water usage is not so high, then the 0.5 GPM should be good for you.

Installation and Maintenance

With a detailed DIY instruction manual and quick connect fittings, installing this unit will be somewhat easy and everything required for setup is provided.

The challenging part may be installing the dedicated chrome faucet it comes with if you don’t have a pre-drilled mounting hole as you will need to drill one.

Filter replacement is a hassle-free process since the filter head features the convenient twist on/off mechanism which allows you to change the filter cartridge within seconds without even turning off your feed water supply. This mechanism also prevents the mess that usually happens when changing out traditional filters. 

There’s an LED filter life indicator on the faucet that automatically monitors the filter life and produces an audible sound to notify you when it’s time for filter replacement which yet another convenient feature that simplifies the maintenance of the unit.

The connections are made of good quality plastic material and once tighten properly, they will not leak and can handle water pressures of up to 80 psi.

In general, the low filtration capacity and flow rate are the only things that may be of concern for some people, but in terms of performance and build quality, it doesn’t disappoint.

For an inexpensive and effective one-stage under sink water filter, this Culligan US-EZ-4 model is a superb deal especially if you are on a tight budget.


  • Effectively removes most common water contaminants
  • Healthy minerals are not filtered out from the water
  • Simple to set up and to replace the filter cartridge
  • LED filter life indicator ensures timely filter replacement
  • Backed by a 2-year limited warranty


  • Average filtration capacity rating at only 500 gallons
  • 0.5 GPM flow rate is a bit slower than other basic models

Read moreCulligan US-EZ-4 EZ-Change Undersink Water Filter Reviews

InSinkErator F-2000S Under Sink Water Filter Reviews

Up next we have the InSinkErator F-2000S water filtration system. This is a simple under sink water filter that offers a reasonably rigorous filtration process at a fairly low price tag and maintenance cost.

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Filtration Performance

The filtration process of the InSinkErator F-2000S comprises only one stage which features an efficient filter cartridge that’s certified to both NSF standard 42 and 53.

The filter contains a carbon block media and an ion exchange resin which together do so quite well to eliminate a substantial amount of contaminants.

The carbon block filtration media, in particular, reduces up to 97.5% of chlorine taste and odor in the water. It will also remove 99% of the normal particulates class 1 and cysts as well as turbidity.

The ion exchange resin in the filter takes care of heavy metals like lead and mercury. It’s capable of removing up to 99% of lead including other potentially harmful contaminants like asbestos, atrazine, benzene, Lindane, 2,4-D, carbon furan, and p-Dichlorobenzene.

To put it simply, this is a filter that will work best with treated water that’s not high on contaminants like fluoride and microorganisms. It’s ideal for light filtration purposes geared towards improving the quality of water rather than doing thorough filtration.

Filtration Capacity

The maximum filtration capacity of the InSinkErator F-2000S is 500 gallons, so it can last 6 months depending on the conditions of your feed water.

You will, however, enjoy an average water flow rate of around 0.75 gallons per minute at 60 psi pressure which is not high but it’s almost the same level of flow you would get from a regular tap.

Installation and Maintenance

The F-2000S system uses the twist and lock quick-connect filter head, and doesn’t need a separate dedicated faucet. Therefore, installation is a breeze and you get all the parts required to set it up.

You can connect it to your existing cold water line and standard kitchen faucet but the tube may be smaller but according to InSinkErator, they have designed this unit for exclusive use with their InSinkErator water dispensing systems hence If you already have one, then it will be compatible with it.

Filter replacement is straightforward too thanks to the twist and lock design of the filter head and it should be done every 6 months to ensure optimum performance.

The whole unit plus the fittings and connectors are solidly built and will withstand very high pressures of up to 120 psi. The lowest pressure it can operate with is 30 psi.

If you ask us, this InSinkErator F-2000S under sink water filter system won’t give you the largest capacity but one thing you will love about it is the good price-performance ratio.

It’s a suitable choice for those whose major concerns are getting rid of chlorine, lead and several other common contaminants that don’t necessarily need an RO filtration system to remove.


  • Decent filtration performance
  • Ideal for removing chlorine and heavy metals
  • Quick and easy to install and to change the filter cartridge
  • Solid and durable overall build quality
  • Comes with a 1-year limited warranty


  • Low filtration capacity at only 500 gallons
  • Does not remove microorganisms and fluoride
  • The 0.75 GPM water flow rate is a little slow

Read moreInSinkErator F-2000S Under Sink Water Filter Reviews

Filtrete 3US-MAX-S01 Under Sink Water Filter Reviews

In the 12th position is the Filtrete Maximum 3US-MAX-S01 model which is the most economical pick on this list and one of the few wonderful water filters on the market that’s priced $100.  

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The unit is part of three models under Filtrete’s 3US series with the other two being the Standard (3US-AS01) and Advanced (3US-PF01) water filters. 

The major difference between these three models is their filtration capacity but the Filtrete 3US-MAX-S01 which we are going to look at below stands out in terms of getting rid of contaminants as it provides the highest rate of filtration. It’s cheaper and definitely more dependable than the other two models.

Filtration Performance

The Filtrete Maximum 3US-MAX-S01 is a simple 1-stage system featuring a high capacity filter media that has received both the NSF 42 and the much stringent NSF 53 certifications. This means it’s very capable of significantly enhancing the quality of your municipal water.

The system utilizes a 0.5-micron carbon block filtration medium which is way effective compared to basic carbon-based filters with the ability to remove 97% of chlorine taste and odor alongside other select chemicals like the pesticide toxaphene, herbicide atrazine, and select pharmaceuticals.

It has the additional capability of clearing out lead and microbial cysts (giardia and cryptosporidium) by over 90%. The filter is also able to trap sand, dirt, rust and other particulates present in your water down to 0.5 microns which is a huge plus because a lot of other carbon filters can only reduce particles that are as small as 5 microns.

The fact that it meets the NSF 53 certification means that it’s relatively sufficient to remove VOCs and other heavy metals although not to a large extent. 

From our own assessment, we would say that this is a system that’s more geared towards dealing with heavily chlorinated water and lead, and several common city water issues as well. It’s not a unit for use with well water.

Capacity and Efficiency

We mentioned earlier that filtration capacity is the major factor that differentiates the three models in Filtrete’s 3US series. Both Standard (3US-AS01) and Advanced (3US-PF01) water filters provide a maximum of 2,000 gallons filtration capacity.

As for this Filtrete Maximum 3US-MAX-S01 model, it’s rated to process up to 1,500 gallons of water before it requires to be changed.

It’s a little lower than its counterparts but still, it’s on the higher end when you put it side to side with the other contenders herein. Even so, Filtrete recommends a 6 months replacement cycle which makes it no different to the other picks with lower capacity.

Apart from the large capacity, this unit will deliver water at a rate of around 1.5 gallons per minute. That’s faster than what many competing sing-filter systems can offer. It’s more than adequate to cater for the needs of those with regular high water usage.

Installation and Maintenance

For installing the system, it’s an easy DIY process with only a single filter to mount inside your under sink cabinet where it will fit nicely without taking up so much space. It’s extremely compact and it works with any standard kitchen faucet, so drilling is needed.

Maintaining this system is easy too. You just have a single filter cartridge to replace which should be done twice a year.

One weak point we noted though is that the unit utilizes a simple push-in design to connect the tubing to the plumbing instead of a secure compression fitting.

Therefore, the connections may possibly not be that secure and can lead to leaks in case of very high pressure. The fittings plus the faucet are made from plastic hence are also not as sturdier as the other picks that use metal.

All in all, being a low-cost under sink water filter that pretty much does its job well, the Filtrete Maximum 3US-MAX-S01 is definitely a convenient option for those that don’t want to break the bank. It will save you money and provide the necessary filtration performance to keep your tap water clean and safe.


  • Effective at reducing chlorine, lead and other common contaminants
  • Large capacity at 1,500 gallons and faster water flow at 1.5 GPM
  • Simple DIY installation as well as filter cartridge replacement
  • Takes up little space and works with existing kitchen faucet
  • Highly affordable with multiple grades of replacement filter to choose from


  • Fittings and faucet are all plastic
  • Not rated for filtering well water

Read moreFiltrete 3US-MAX-S01 Under Sink Water Filter Reviews

GE GX1S50R Under Sink Water Filter Reviews

The GE GX1S50R is a small, simple under sink water filter but packs a commendable punch as far as removing contaminants in the water is concerned. It’s an excellent choice for reducing chlorine and undesirable particles from lowly-contaminated municipal water.

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Filtration Performance

Water entering the GE GX1S50R water filter system from the cold water supply goes through a single-stage filtration process inside the filter cartridge where several different kinds of contaminants are extracted from it.

The system uses a high quality activated carbon filtration media which removes up to 97.6% of chlorine, and negative tastes and odors. This medium is also able to clear out 99% of lead and filterable cysts like giardia and cryptosporidium.

The other contaminants it will remove from your water include turbidity, asbestos, lindane, atrazine and heavy metals like mercury.

If your water often comes out with small particles suspended in it, then this General Electric filter will as well come in very handy.

Alongside removing most of the chemical contaminants, it’s capable of trapping nominal particulates down to 0.5 microns which clears out 98.8% of dirt, rust, sediment, sand, silt and any other particulate present in the water.

It’s basically a dependable and reliable single-stage filtration that can supply fresh, filtered water but only for use with already treated water like from city treatment plants. We wouldn’t recommend it at all for filtering well water.

Filter Capacity and Efficiency

The GE GX1S50R filter cartridge can process a maximum of 750 gallons of water before it can be replaced. It’s a low capacity unit but if you are processing 4 gallons of water a day, then it can work effectively for up to 6 months.

 Water comes out of the faucet at a maximum flow rate of 0.75 gallons per minute which again is not that high but will do fine for low-demand usage.

Installation and Maintenance

You can successfully install this unit with some basic DIY skills. It uses a separate dedicated chrome faucet which will require drilling a mounting hole into your countertop but once you are done with that, the rest is straightforward. The filtration system is a single filter unit with a small footprint, so it will fit anywhere, even in tight spaces.

The filter head features a twist and lock design that makes replacing the filter cartridge equally fast and easy.

You will have to change it at least twice a year and to save you from guesswork, General Motors has integrated a filter life indicator with a reminder light on its dedicated faucet. It will conveniently remind you when it’s time to replace the filter cartridge to maintain the best filtration results.

Overall, if you need a water filtration system purposely for filtering out chlorine, lead and unpleasant tastes and odor, then you may consider getting this GE GX1S50R under sink water filter.


  • Good for removing chlorine taste and odor
  • Can trap nominal particulates down to 0.5 microns
  • Average filtration capacity of 750 gallons
  • Easy to install and has low maintenance
  • Faucet features a filter life indicator
  • Comes with a 1-year limited warranty


  • Shorter filter life and low filtration rate
  • Not recommended for filtering well water

Read moreGE GX1S50R Under Sink Water Filter Reviews

3M Aqua-Pure 3MFF100 Under Sink Water Filter Reviews

The 3M Aqua Pure 3MFF100 is an under sink water filtration system that’s built to great quality. From its capacity to its filtration capability and water flow rate, everything is well balanced to ensure not only optimum performance but also long term use.

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Filtration Performance

The 3M Aqua Pure 3MFF100 is an NSF standard 42 and 53 certified filtration system plus it’s compliant to CSA B483.1. What this means is that it’s tested and certified to remove a wide range of common water contaminants.

The unit is equipped with an advanced triple-stage filtration process comprising of a nonwoven media, a pleated sub-micron membrane, and then a composite activated carbon block filter.

The nonwoven media makes up the 1st stage and it helps capture the larger particles in the water as it moves through the filter.

The pleated sub-micron membrane is fitted in the second stage and it effectively deals with the tiny particles lingering in the water reducing them down to 0.2 microns. It also helps remove other harmful contaminants such as lead, parasitic protozoan cysts, and select VOCs like benzene and p-Dichlorobenzene.

The 3rd stage is the carbon block filtration media which significantly reduces chlorine and other chemical contaminants that cause tap water to have an unpleasant taste and odor. Through these three effective filtration stages, the system is able to deliver great-tasting, filtered water that’s clean and healthy for drinking or cooking.

Capacity and Efficiency

Now the other thing you will like about this 3M Aqua Pure 3MFF100 model is that it provides a maximum filtration capacity of 6,000 gallons which is the third-highest on this list behind Woder WD-S-8K-DC at 8, 480 gallons and CuZn UC-200 at 50,000 gallons.

With this large capacity, it will perform efficiently for up to 12 months or more depending on the condition of your municipal water.

Another key feature is the flow rate. It’s designed to deliver up to 2.5 gallons of filtered water per minute which is the highest rate we’ve covered in this review.

You will get your filtered water much faster than your ordinary kitchen faucet and you can expect little loss of water pressure as commonly seen when using certain under sink water filters.

Installation and Maintenance

The 3M Aqua Pure 3MFF100 does not require a separate dedicated faucet as it uses a standard or regular kitchen faucet, so it’s easier to install and there is no hole to drill.

The package comes with the fittings and tubing that can fit most water supplies, plus it is compact requiring minimal under sink space.

The filter cartridge change-outs are fast and easy as well plus you won’t have to do it more often since it can last up to a year. The head assembly features a shut-off valve which allows you to change the filter cartridge without having to shut off your water supply.

If you want an enduring under sink water filtration system that’s well made and has good qualities, then the 3M Aqua Pure 3MFF100 should be one of your top considerations.


  • Significantly reduces chlorine along with other harmful contaminants
  • Removes nominal particulate class 1 down to 0.2 micron
  • High filtration capacity and water flow rate
  • Easier to install and to replace the filter cartridge
  • Can handle maximum operating pressure of up to 125 psi
  • Comes with a 1-year limited warranty


  • Does not filter out fluoride
  • Not ideal for purifying untreated (not chlorinated) water

Read more3M Aqua-Pure 3MFF100 Under Sink Water Filter Reviews