Under Sink Water Filters

Under sink water filters are the preferred choice of many people due to the fact that they are a discrete addition, not occupying any counter space while they do their work excellently. If you are interested in purchasing the product, make sure that you check out our comparison table below to find out what are your best options.

Top 5 Under Sink Water Filters Comparison

  1. Aquasana AQ-5300.62 2. Pelican Water PDF-1500-PC 3. Crystal Quest Undersink Triple Fluoride System 4. APEC Essence ROES-50 5. iSpring RCC7
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Product Specifications

Manufacturer Aquasana Pelican Water Crystal Quest APEC Water Systems iSpring
Dimensions (H x W x D) 9″ x 4.2″ x 12″ 15″ x 12.5″ x 4.5″ 14″ x 5″ x 15″ 17.5″ x 16″ x 5.25″ 17.5″ x 14.5″ x 5.2″
Weight 6 Lbs 6.25 Lbs 14 Lbs 26 Lbs 25 Lbs
Fitting Size 0.25″ 0.375″ 0.25″ 0.25″ 0.25″
Faucet Options 3 3 1 1 1


Number of Contaminants Removed 77 N/A N/A Over 1000 Over 1000
Filtration Stages 3 3 3 5 5
Filter Types Sediment Pre-Filter, Activated Carbon, Catalytic Carbon 25 Micron Pre-Filter, Two Catalytic GAC Carbon Media Sediment Filter, Two Filter Pads, Coconut Shell Granulated Activated Carbon, Ion Exchange Resin, Two High-Purity Alloy Blend Medias, Solid Carbon Cartridge Two Carbon Block Media, Reverse Osmosis Membrane, Coconut Carbon Media, Sediment Pre-Filter Sediment Pre-Filter, GAC Media, CTO Media, Reverse Osmosis Membrane, Post Carbon Media
System Capacity 600 Gallons 1500 Gallons 10000 Gallons 1000 Gallons N/A
Maximum Feed Water Pressure 80 PSI 80 PSI 60 PSI 85 PSI 85 PSI
Flow Rate 0.5 GPM 1 GPM 0.5 GPM 1 GPM 75 GPD
Maximum Feed Water Temperature 90 degrees Fahrenheit 100 degrees Fahrenheit 90 degrees Fahrenheit 100 degrees Fahrenheit 100 degrees Fahrenheit
NSF Certified N/A


DIY Installation
Filter Replacement Frequency 6 Months 6-12 Months 1-3 Years 6-12 Months 6-12 Months
Easy Filter Replacement
Filter Change Indicator

Important Contaminants that it Helps Remove


Warranty & Support

Product Warranty 1 Year 1 Year 1 Year 1 Year 1 Year
Customer Support
User Manual

The Filtration Systems Evaluation

1. Aquasana AQ-5300.62

Eliminating chloramines is a feat not few water purification systems are capable of doing, yet this Aquasana entry does it masterfully. During the 3-stage filtration process it employs, the system actually tends to the removal of 77 different contaminants that lurk in the water. The filter life capacity it boasts is 600 gallons, so cartridge replacement won’t be required all that often, maintenance costs being pocket-friendly. The stylish designer faucet comes in 3 different finishes to match the room’s existing décor, more precisely chrome, brushed nickel, and oil rubbed bronze. There is even a filter change indicator that lets you know exactly when the moment comes to perform maintenance work, eliminating guesswork. It is easy to install, the entire procedure being explained in the accompanying instructions manual. Furthermore, the system is backed with a 1-year warranty against defects in parts and labor.
Aquasana AQ-5300.62

Filtration Process

As we have stated previously, a 3-stage filtration process is employed to rid the water you use of harmful contaminants. Before the water actually begins passing through the filtration media, it is passed through a 20-micron pre-filter that ensures the system won’t clog too soon by eliminating rust, silt, and sediment. The media used by it include an activated carbon media that reduces VOCs, pharmaceuticals, herbicides, and MTBE, a catalytic carbon media that specifically targets chlorine and chloramines, and an ion-exchange media that tends to the removal of mercury and lead, two of the most dangerous contaminants present in our drinking water.

Contaminant Removal Efficiency

What matters most with these systems, undeniably, is their efficiency when it comes to the elimination of contaminants present in your drinking water. As the Aquasana boasts an impressive capability of removing up to 77 different types of contaminants that lurk in the water, most of them presenting a severe threat to your health, it is safe to say that this is one of the most efficient systems you can turn to. It actually reduces chlorine and chloramines up to 97%, its lead reduction capability passes 99.3%, it reduces VOCs approximately 99.4%, and particulate reduction is as high as 99.9%.

Mention Worthy Details
  • Sub-micron mechanical filtration it utilizes ensures that even chlorine resistant cysts will be removed from the water.
  • Easy twist-off design of the filtration media makes replacement work a cinch.
  • Provides a 0.5 gallons per minute flow rate which ensures water pressure won’t be lost.
  • Rated at a 90 degrees Fahrenheit maximum feed water temperature.
  • Company provides a 90-day trial period, so you can return it and receive a full refund in this period of time if you are not pleased with the product.

Generally, with these systems, maintenance work is dreaded by users as it is pretty bothersome and quite costly. However, this isn’t the case with the Aquasana as the simple twist-off design of the cartridges ensures you will have an easy time replacing them when the time comes to do so. Furthermore, replacement cartridges are quite inexpensive when compared to other selections you encounter out there. Due to the fact that it uses a 20 micron pre-filter to capture silt and rust which might have otherwise clogged the entire system, its lifespan is lengthened to 600 gallons, meaning that you are likely to change the cartridges only once every 6 months.

Uses an activated carbon media, a catalytic carbon media, an ion-exchange media, and absolute sub-micron mechanical filtration to deliver clean water
It announces you when the time comes to change the filters
Reduces up to 77 contaminants, including the dangerous and hard to get rid of chloramine
Easy filter replacement and system installation spares you money that you would have to had paid for a professional to step in

Boasting an effective 3-stage filtration which ensures no contaminants will escape it, this system is your go-to solution if you care for your health and want to make sure that you will ingest nothing but clean, pure water from now on. Furthermore, it is quite reasonably priced considering what it offers, and the installation process can be performed without the help of a professional.

2. Pelican Water PDF-1500-PC

The 3-stage filtration process through which this system passes the water you end up drinking and using when you cook has proven to be one of the most efficient as it tends to the removal of almost all encountered contaminants, leaving behind clean, pure water. During the filtration process, it employs a 25-micron pre-filter and two catalytic GAC carbon media, which not only eliminate dangerous particles, but tend to improving water odor and taste. The small footprint the system boasts is an advantage worth mentioning as it means that even if the space beneath the sink is limited, this won’t be an issue. It is easy to maintain, all you have to do being to remove the cover and replace the filtration media once every 6 to 12 months, depending on usage. Furthermore, it boasts a hassle-free installation which you can definitely perform on your own, no tools being required for it. Best of all, the carbon filter media inside it helps retain important minerals – like calcium and magnesium – minerals that actually aid boost your health. There are 3 faucet options you can select between to match the décor of your kitchen, more precisely bronze, chrome, and brushed nickel. It boasts a 1500-gallon system capacity. in addition, the manufacturing company backs it with a 1-year warranty.

Carbon media helps it retain calcium, magnesium, and other essential minerals in the water
Passes the water through an effective 3-stage filtration process
It uses a 25-micron pre-filter and two GAC carbon media
Accompanied by a 1-year warranty

Due to the highly effective 3-stage filtration process it employs, this Pelican system is one of our favorite selections, one we strongly recommend you acquire. As it not only eliminates contaminants, but it retains beneficial minerals, it’s hard to overlook it as an at home solution for any health conscious person.

3. Crystal Quest Undersink Triple Fluoride System

During the three filtration stages it employs, this system uses a Fluoride media, a SMART media, and a carbon block media to obtain maximum results in terms of contaminant removal. The Fluoride filter media has the obvious purpose of reducing fluoride content in your drinking water, the SMART filter media reduces heavy metals like aluminum, copper, lead, and it helps reduce water hardness, while the carbon block filter media traps particles larger than 5 microns, including dirt, sand, sediment, and silt to ensure the water you end up drinking is as pure as possible. As it measures 16 inches in length, 14 inches in height, and 5 inches in width, it won’t take up a lot of space in the cabinet underneath the sink. It is able to operate at water temperatures ranging from 40 to 90 degrees Fahrenheit, while the operating pressure range is from 20 to 60 pounds per square inch. The maximum flow rate at which it delivers the water is 0.5 gallons per minute. It comes with a faucet and everything you need to go through with the installation process on your own, so there is no actual need for a professional to come in and do the procedure for you. It comes at quite a reasonable price as opposed to most entries on this market, for those who are on a budget being the ideal option. Furthermore, the manufacturing company backs it with a 1-year warranty for parts and workmanship.

Maximum flow rate of 0.5 gallons per minute
Operating temperature range from 40 to 90 degrees Fahrenheit
Maximum operating pressure of 60 pounds per square inch
Employs a 3-stage filtration process for optimum contaminant removal

Install the system neatly under the sink and you won’t have to worry that you are ingesting contaminants when you drink water anymore. In addition to being highly effective at eliminating fluoride, which is obvious as the name states it, the system tends to other contaminants as well, including heavy metals and chlorine.

4. APEC Essence ROES-50

A 5-stage system that you can rely on when it comes to the removal of over 1000 different types of common contaminants that lurk in the water, the Essence is an offer you cannot refuse, especially considering the rather reasonable price it comes at. If you just follow the steps provided in the instruction manual, you can perform the system’s installation yourself. Due to the fact that it comes with quality fittings that guarantee a good grip, leaks are sure to never occur, so you won’t need to separately install a detector for them. During the purification process, it employs double carbon blocks that maximize contact time in order to provide a thorough removal of chlorine and chemicals from the water you hydrate with. Other media it uses include a RO membrane, sediment pre-filter, and a coconut carbon media. Due to the fact that the filter replacement frequency it requires ranges from 6 to 12 months, depending on your water consumption, it is safe to say that this is an economical system to opt for. It comes with a lead-free faucet that ensures the water won’t be contaminated before it is delivered in your glass. Additionally, a 1-year warranty is provided for the system, but you can expand it to 2 years through the simple registration of the product on the manufacturer’s website.

Tackles over 1000 types of impurities it encounters Does not announce you when the cartridges need to be replaced
High-capacity system – requires maintenance only once every 6 to 12 months
Easy DIY installation is possible by simply following the provided instructions in the user manual
1-year warranty agreement can be prolonged with the simple registration of the product

This 50GPD system is a desirable one to opt for as it provides thoroughly filtered water that has been passed through 5 different filtration stages. The effective media it employs is able to remove over 1000 types of impurities, so you can rest assured knowing that lead, chlorine, fluoride, and many other contaminants won’t affect you anymore.

5. iSpring RCC7

A reverse osmosis system that helps not only decontaminate the water and make it safer to use and drink, but that softens hard water as well in order to prevent damage to appliances that utilize it to run, the RCC7 is one of our top recommendations. It comes at a rather accessible price as opposed to other entries in its market. As it is rated to eliminate up to 99% of more than 1000 different types of impurities lurking in tap water, you can confidently rely on it to tackle health-threatening contaminants like chlorine, viruses, arsenic, fluoride, calcium, asbestos, and more. This system passes the water through 5 separate filtration stages before releasing it, each stage being designed to progressively remove encountered impurities. The media it uses during the purification process includes 3 pre-filters, a reverse osmosis filter, and a fine GAC filter. It takes 2 to 4 hours install it, but the procedure is quite simplistic, so you won’t have any issues in this department. Due to the fact that it provides a 75 gallons per day production rate, it is perfect for use in homes of all sizes. Furthermore, the manufacturing company backs it with a 1-year warranty on parts and labor.

Can tackle eliminating over 1000 different types of impurities it encounters Takes a bit longer to install it as opposed to other entries in our top – 2 to 4 hours on average
Reasonably priced – one of the more affordable acquisitions on the market
Passes the water through a 5-stage filtration process
High 75 GPD production rate makes it suitable for all-size households

No matter how big or small your family is, this is your go-to option for clearing the water you drink and use of nasty impurities that threaten your health. It is reasonably priced, which makes it more accessible than other entries on the market, while the 5-stage purification it employs guarantees utter quality in tackling the contaminants it finds.

Rating Our Picks

Rating Criteria How It Impacts Product Quality Product to Receive the Best Score
Filtration media The type of filtration media it utilizes in order to reduce pollutants from the water shows the system’s efficiency in purifying it. Each media type tends to the fixing of certain water quality issues, so the combination of different media types is mandatory for the system to remove as wide of a variety of contaminants as possible. Crystal Quest Undersink Triple Fluoride System
Contaminant removal efficiency The bigger the number of contaminants removed is, the better as it indicates that the system can tackle almost any kind of impurity it might find. However, it should deliver a high removal percentagewhen it comes to common and dangerous pollutants like chlorine and VOCs as well. APEC Essence ROES-50, iSpring RCC7
Purification stages As the system passes the water through a higher amount of purification stages before it is released through the tap, you are ensured that more impurities and contaminants are removed. Obviously, the type of filtration media it utilizes during the purification process matters more than the number of stages it is passed through as higher quality media are able to remove more dangerous contaminants at higher rates. APEC Essence ROES-50, iSpring RCC7
Cartridge replacement Cartridge replacement frequency is the best indicator of how much money you will have to invest in the system as time passes. Evidently, it is best to go for a product that doesn’t require you to replace the cartridges all that often in order to avoid costly maintenance work. Crystal Quest Undersink Triple Fluoride System
DIY installation Asking for the help of a professional when you install the system translates to a few hundreds of dollars lost on a task that you would have been able to do on your own if it weren’t to require any special skills. A water purification system could be a DIY installation project to take up, only if it were to come with proper instructions for each step of the process, and not require any advanced plumbing skills. Aquasana AQ-5300.62, Pelican Water PDF-1500-PC, Crystal Quest Undersink Triple Fluoride System, APEC Essence ROES-50, iSpring RCC7

Common Water Pollutants and the Decay of Our Health

Our need to stay hydrated in order to survive confronts us with a harsh reality – considering how much our health is negatively influenced by the pollutants that lurk in the water we drink. There is no mystery to the fact that bottled water does more harm than good, and seeing how tap water is an even worse source of getting hydrated, it might seem like there is no solution to our problems.

Under sink systems present the ideal way to stay hydrated without endangering your health as these filters make it a point to remove unwanted and harmful contaminants, leaving behind clean and safe water for consumption. Learn more about the common pollutants that all top of the line water filters eliminate and how their presence in tap water could affect your health by reading the following lines.

  • Chlorine: This chemical is all so present in our drinking water as it has the capability to disinfect it and keep dangerous bacteria, like giardia and E-coli at bay. However, exposure to chlorine on a daily basis and its regular consumption through water can take a toll on your health. If you are lucky, you will only get a rash or irritation caused by bathing in the water. In case your health is on the fritz and luck is not your strong point, you could even have cardiovascular issues or become predisposed to cancer.
  • Lead: This is a dangerous and persistent contaminant that can take a toll on your health in the long run. The bad news is that it has an almost immediate negative effect on children’s health, so if you are a parent, you cannot afford to take risks and get the small one sick. The effects of lead contamination on your health include impaired hearing, damage to the central nervous system, impaired function of blood cells, and so on.
  • Mercury: Poisoning with this harmful contaminant leads to unwanted health effects that include impaired speech, impaired hearing, impaired walking, muscle weakness, loss of peripheral vision, lack of coordinated movements, and so on. One of the most powerful and dangerous pollutants to reside in tap water, it must be eliminated in order to ensure your well-being.
  • VOCs: VOCs or volatile organic compounds is a term applied to a broad category of chemicals, either man-made or natural. When volatile organic compounds found in drinking water reach alarming levels, your health is the first one to receive a downgrade as their toxicity exposes you to the apparition of various forms of cancer, nervous system problems, and kidney health issues.

With a maximum feed temperature of 90 degrees Fahrenheit and a system capacity rating of 600 gallons, the Aquasana AQ-5300.62 is inevitably the number one pick. Furthermore, its list of pros does not end there as it is actually able to eliminate up to 70 different contaminants, passing the water through 3 separate filtration stages. Aside from this top quality system, another entry which blew us away with its stats and capabilities is the Pelican Water PDF-1500-PC which has a generous 1500-gallon capacity and requires filter replacement only 1-2 per year. However, if you are faced with severe problems in terms of water contamination, we recommend you opt for the >APEC Essence ROES-50 or the iSpring RCC7 as both systems can remove over 1000 contaminants.

Frequently Asked Questions

?Does the number of filtration stages matter?
Yes, it does matter through how many filtration stages the water is passed, but this aspect does not top the importance of the specific filtration media utilized in the purification of the water. To put it in simpler words, it is more important for the filtration media types utilized by the water purification system to be of a good quality rather than just be a high number of filtration stages through which the water is passed.

?What does the system capacity show?
The system capacity shows what is the amount of water the filtration system can purify before the filter will require replacement. Obviously, it is better to go for a bigger capacity product when it comes to this aspect as you will have less maintenance work to worry about. Additionally, you won’t be spending as much money either as you will buy the media more rarely.

?What is the role of the filter change indicator?
Depending on how much the filtration system is being used, it will eventually need to be replaced as its efficiency will drop and it won’t be able to handle removing the contaminants which lurk in the water anymore. Furthermore, all filtration media have their own lifespan, generally lasting from half an year to 12-18 months. When the time does come for this replacement to take place, you will be announced by the filter change indicator. Thus, its purpose is very important in the efficiency scheme of the filtration system, being valuable as it eliminates guesswork completely.

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