8 Best Under Sink Water Filters By Consumer Report for 2020

Under sink water filters, are currently very efficient in removing contaminants that reverse osmosis systems were only able. This is made possible by filters that block the contaminants in under sink water filters. It’s also vital to note that unlike reverse osmosis water filter system, under sink water filter does not produce waste water.

The under sink water filters, are efficient and are environmentally friendly compared to other water filters systems. The under sink water filters fits under the sink in the cabinetry; they are capable of removing chlorine, lead, cysts, and mercury. If they have an ultraviolet system, they will be capable of killing microbes as well.



The iSpring RCC7 is designed with premium quality components that are certified by the Water Quality Association against the NSF/ANSI standard 58. This means the unit offers high reliability and minimal maintenance, thus offering services for years. It has an easy installation process; you can, however, call the customer care to send a technician for installation.

The iSpring RCC7 has an elegant European design, a brushed nickel tap and a transparent housing which fits right under the sink. The unit purification process occurs in 5 stages, which removes contaminants and improving the quality of water progressively. The iSpring RCC7 has three pre-filters; that is the granular activated charcoal filter, the carbon block filter, and the polypropylene sediment filter.

The three pre-filters remove large contaminants, protecting the reverse osmosis membrane from chemicals such as chlorine and chloramines. At the center of the system, there’s a reverse osmosis filter, which removes contaminants that are as small as 0.0001 microns. This ensures that anything as small as water can only squeeze through the system.  Its fine granulated activated carbon filter eliminates odors to supply you with pure sparkling water free from water hardness.

The unit features Reverse Osmosis water filter for delivering clean and healthy water for consumption. The system is capable of softening water and removing a thousand contaminants like mercury, pharmaceuticals, arsenic, and chlorine. The filter system ensures that you get clear ice cubes, better tasting water, healthier water and baby formula, and fresher beverages.

The iSpring RCC7 membrane has a water flow rate of 75 gallons in a day; it also has three years warranty and lifetime support.


Global Water Filter System commits to creating affordable and adaptable solutions to meet the need for safe drinking water. The unit has a cutting edge technology in their system which process portable water. It also has a quick connect fittings which makes the system functional in only a few minutes.

The unit has color-coded filters, which comes with clear instruction; the components utilized are 100% lead free; all the system parts are universal and are NSF standard certified. Water passes through five-stages in Reverse Osmosis System, which make sit clean and safe for consumption.

In stage one, water flows through NSF approved 5-micron polypropylene sediment filter. It filters large and fine particles like dust, sand, and silt. Stage two water passes through 10-inch coconut shell Granulated Activated Carbon (GAC) filter. Stage two filters absorb odors, turbidity, chlorine, organic compounds, and colors.

In stage three, it’s chlorine, Taste, and Odor (CTO) filtration, the carbon block filter, which is made of coconut shell purifies water and removes VOCs. In stage four, Thin Film Composite (TFC) reverse osmosis membrane of high quality filters 99% of contaminants. Heavy metals such as mercury, arsenic, dissolved chemicals, and lead are also removed. At stage five, inline cartridge acts as a polishing filter which eliminates odor and residual taste.

Global RO-505 is a 5-Stage RO system which has premium NSF filters capable of removing 99% of contaminants. The unit has a capacity of providing 50 gallons of water demand in a day. It also has a one year warranty and comes with a tank, installation kit and valves, colored tubing and a faucet.


Advanced Purification Engineering Corp (APEC) is the leading brand in a residential reverse osmosis filtration system in the United States. The system is designed, engineered, and built in the United States; the system provides a continuous demand for filtered water to your faucet directly. APEC Water Filtration System is capable of delivering clean and safe drinking water at an affordable price.

The unit is a complete three-stage system made of high caliber components that offer a long lasting and reliable performance. The three-stage filters have filters made of premium material that lasts over a year. The system provides excellent performance, and its operation is economical as it’s easier on the environment and your pocket.

The APEC three-stage filter system contains three pillars; the first pillar houses high capacity and high-grade 10-inch extended polypropylene sediment filter (PP). The PP removes dust, particulate matter, and rust; its 100% PP depth filter has a high capacity in holding particulate matter.

The second pillar has 10-inch long Extruded Carbon Block (ECB) that is of high quality. The block absorbs odors, chlorine, VOCs, turbidity, tastes, and other chemicals. The third pillar, on the other hand, has 10-inch long Extruded Carbon Block (ECB), which removes residual chemicals, odors, and tastes. Scrubbing of water done ensures that you get access to safe and excellent tasting drinking water.

The APEC filters have a capacity of 2000 gallons in a set of filters; it requires 20 to 85 psi water pressure and temperatures of 400F to 1000F. This ensures that the under sink water filter system works at its optimum capacity. The water filter comes with an installation kit that has tapes, manual, wrenches, and one year warranty.


The Aquasana commits to bringing clean and safe water in a sustainable manner to you. The Aquasana under sink water filter is a two-stage filtration system, which distributes water via lead-free brushed nickel tap. The filters are particularly easy to change because of its twist-off design.

The unit has the Claryum technology, which has Activated Carbon that absorbs VOCs, MTBE, and organic chemicals like pesticides and herbicides. It’s Catalytic Carbon isolates chlorine and chloramines, the Ion Exchange eliminates heavy metals like mercury, lead, and arsenic. The Absolute Sub-Micron Mechanical Filtration (ASMF) filters chlorine resistant cysts of asbestos, giardia, and cryptosporidium. The resulting water has beneficial minerals.

The unit’s replacement of parts is made to be easy with no need of disconnecting the water lines. This is made possible by the filter housing, which twists off easily for the replacement to be made. The unit has AQ-5200 that alerts you on a change of filters. The filter system is made to have a minimum environmental impact that utilizes minimal plastic disposable parts.

The Aquasana utilizes the Claryum technique in removing 99% of seventy-seven known pollutants like pesticides, mercury, pharmaceutical, and asbestos but retaining healthy minerals like calcium, potassium, and magnesium. There’s neither waste nor addition of any compound in the water during filtration.

The under sink water filter can process 500 gallons in a filter set at 10% per gallon. The filter has a lifespan of 6 months, which makes them cost-effective. The unit has a lithium metal battery which lasts for 1590 hours, housing and tubing. Not to forget its one year warranty and an installation guide.


When it comes to the Ecosoft 5-Stage system, it’s a combination of reverse osmosis and mechanical filtration purification technology. Installation of the unit has three stages that are, the reverse osmosis membranes, the carbon post-filters, and a pre-treatment assembly. Filtered water can be kept in a storage tank or the countertop, the system is compact and can fit in under the sink cabinet.

The Ecosoft has five-stages of filtration; stage one has one pre-filter of 5-micron polypropylene cartridge, which eliminates particulate matter like SPM, sediments, leaves, and metal. The stage two pre-filter has granulated Carbon, which is made of coconut shell that removes color, taste, and smells through absorption. The third stage pre-filter cartridge is charcoal or carbon processes where there’s further removal of contaminants like Turbidity and VOCs.

Its stage four has a one-micron reverse osmosis membrane, which filters the smallest microbes and cysts, organic and organochlorines. Stage five has carbon post-filter that gives the final polish to your water that ensures your water is sparkling and crystal clear. The cartridge has a service life of three months for pre-treatment modules, one and a half years for reverse osmosis membrane and one year for carbon post-filter.

The Ecosoft is ideal for homes, offices, and restaurants as it’s capable of removing all water pollution in the five stages. It can remove up to 99.8% of contaminants in your water. The unit is NSF certified and can filter up to 500 gallons in a single filter for less than $0.07 per gallon.


For the CuZn UC-200 filtration, it utilizes a three-step process; water passes via the Micro Sediment Membranes (MSM), KDF-55 filter, and coconut shell filter. The MSM eliminates large particulate matter like rust, dust, dirt, and leaves. Activated coconut shell carbon absorbs odors, THMs, agricultural runoff, offensive tastes, and chlorine. KDF 55, on the other hand, is a processing medium and high purity copper-zinc alloy.

The KDF 55 is capable of removing 98% of water-soluble heavy metals, reduce limescale, improving the taste of beverages and foods, and controlling of microorganisms. The UC-200 filter model fits under the sink to filter more than 50,000 gallons of water demanded. The filter contains a patented trace of copper-zinc filter tested to the standards 42 and 61 of NSF. With copper and zinc, bacteria cannot be able to grow in the filters.

The filter has virgin acid-washed carbon from coconut shells that combine with copper and zinc filter; this reduces chlorine, molds, algae, odors, sediments, and limescale. The unit is a cost-effective solution which purifies 50,000 gallons over five years.


Are you looking for an aesthetically designed under sink water filter? Then the WaterChef U9000 Premium is what you need. The unit is designed with an 18/8 surgical stainless steel water body, which gives it its beauty and durability. The filter comes with a designer faucet that has a ceramic disc valve and brass construction. It can withstand 340F to 1000F and water pressure of 125psi, in case you purchase the optional refrigerator kit, it filters your refrigerator and faucet water.

The water filter requires a single cartridge in a year, and it has an intelligent monitor, which tracks your maintenance schedule. The unit is the best in contaminant reduction, with its proprietary 3-ply pleated pre-filter, which increases dirt holding capacity and lengthening the cartridge lifespan.

The WaterChef filter is capable of removing up to 50 contaminants and more; they include lead, agricultural runoff, cysts of giardia and cryptosporidium and chlorine, among others. The unit can also eliminate industrial pollutants like VOCs and other carcinogens. It also adds beneficial compounds in the water, for instance, magnesium, potassium, and calcium, which improves the taste of water.

The WaterChef Premium has a capacity of 1000 gallons and requires a single cartridge in a year.


When it comes to the American Plumber WLCS-1000, it’s an inline filter that has a dedicated faucet. This is essential as it prevents leaching and leaking of contaminated water to your drinking water system. The unit has Pentek housing that encloses a set of dual filters, with dimensions of 9.75inches by 2.4inches by 2.4inches.

The dual filters eliminate larger contaminants, preparing your water for a finer filtration of up to 0.5 microns. The unit can remove 99% of contaminants in your water, giving you healthier and cleaner water for drinking and cooking.  The American Plumber WLCS-1000 comes with a filter life monitor with sound and light alert, in case a filter change is required. Its lifespan is dependent on the quality of incoming water.

The filters are particularly easy to remove and replace; this is because of the twist off housing. The filters are tested and certified by the NSF for a filter life of 1000 gallons and more annually. The unit comes with components needed for installation, for instance, the cartridges, wrench, and adaptors. It also offers an installation manual and a one-year warranty.


For a healthier drinking and cooking water, it’s essential to go for quality under sink water filter. Going for an under sink water filter is ideal, as it’s proven to be more Eco-friendly than other purification systems.  Purchasing the best under sink water filter for your home is very vital. This is because; it ensures that you get access to safe, healthy, and better-tasting water.

Before purchasing an under sink water filter, know its efficiency, and if it can meet your needs. Ensure that you check the contaminants eliminated, price and water versus pure water ration among others. The above review is to help you in choosing the best under sink water filter for your home.