The economical way to provide your family with a lot of filtered water safe for human consumption is by installing under sink water filter.

No one who knows what is happening to your water once it leaves the municipal treatment plant or any filtration facility.

Water can get contaminated in the pipes, and the only way to make sure the water you consume or use for cooking is safe is by installing a water filter. 

This article will guide you find the best under sink water filter for your home or office

under sink water filter

Comparison table of the best under sink water filter 

NameImagefilter lifestagesContaminantsReplacement filterWhere to buy
Home Master TMHP HydroPerfection Undersink water filters2000 gallons7 stageschloramines, chlorine, chemicals, heavy metals, dissolved solids & pharmaceuticalsTap Master ISetTMA8 Artesian And HydroGardener Replacement Water Filter check Amazon
ApecUndersink water filters1000 capacity3 stagesbad odor, colors, chlorine, taste, particles, dust, and rustAPEC FILTER Replacement Pre-Filter Best price and buy
Culligan US-EZunder sink water filter with dedicated faucet3000 gallons1 stageparticulates class III, chloride and removes bad taste and odorRC-EZ-1 filter cartridgeCheck Amazon
Express WaterUndersink water filters1 year5 stagesLead, Chlorine, Fluoride, Cyanide, Giardia, Radium, Asbestos, Calcite, Heavy Metal, Bacteria, Viruses, PharmaceuticalsExpress Water 3 Year Reverse Osmosis System Replacement FilterCheck Amazon
iSpring RCC7AK6-stage Reverse Osmosis System1 year6 stagearsenic, asbestos, chlorine, hormones, fluoride, lead, mercury, sodium, bacteria, giardia, virusesiSpring F9K 1-Year Replacement Supply Filter Cartridge Best price and buy
Aquasana800 gallons3-stagelead, mercury, pesticides, pharmaceuticals, chlorine taste, odor, particulates, cryptosporidium, asbestos, herbicides, detergents, pharmaceuticals, and other volatile organic chemicalsAquasana AQ-5300R 3-Stage Under Sink Water Filter Replacement CartridgesCheck Amazon
Doulton W9330958 SuperCarb Under Sink Filter SystemDoulton under sink filterN/A4-stagefine particulate matter, bacteria, cysts, turbidity,  pathogenic bacteria, hydrogen sulfide, lead,chlorine, taste, odor and organic compounds.each stage filter sold separatelyCheck Amazon
Whirlpool WHADUS5Convectional6 months 2-stagechlorine taste and odor, sediment, cysts, lead, and chemicals.N/ACheck Amazon
Woder under sink water filtration system10,000 gallons or 3-years.1-stageHeavy metals, Chlorine, turbidity, Chromium 6, Volatile Organic Compounds, Mercury, lead, odors and bad tastesN/ACheck Amazon
CuZn UC-200 Under Counter Water Filterunder counter water filter50,000 gallons or 5 years.1-stageorganic, inorganic chlorine, heavy metals (lead, mercury, chromium VI, cadmium, etc.), herbicides, pesticides, sediment, algae, molds, bad taste, and odor.N/ACheck Amazon
Watts Inline Water Filterinline water filter20,000 gallons1-stageChlorine, odor, contaminants, sediment, and particulatesN/ACheck Amazon

What is under sink water filter

Under sink water filter is mounted directly into water line under the kitchen sink.  

Some under sink water filter can be installed in the existing faucet or you install using separate faucet which comes with the filter.

What others are reading 

How Under sink water filter work

undersink water filtersb2017

Cold water from point A sends water to the filter at point B where the filter is mounted at the bottom of the sink.

Then delivers clean water to the user through a particular faucet installed at the top of the sink at point C

The process is under high pressure when you open the filter faucet mounted on top of sink water flows from the entry point to the filter then out the filter faucet.

Some under sink water filter use reverse osmosis method to treat your water while others use multi-stage filtration process.

So they don’t just filter water but still purify water providing guaranteed safe water for human consumption.

Advantages of Under sink water filter

  • Filters or Cartridges last longer since you filter only required water for drinking and cooking
  • Multi-stage filtration process removes different impurities present in water thus giving safe water for drinking
  • Saves time since you get filtered water just by turning on the filter faucet
  • Compared to another filter like pitchers filters it filters 1,000 gallon of water where else pitches filters 20 gallons.
  • Don’t take counter top space of your sink.
  • It does not waste any water

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Disadvantages of Under sink water filter

•    Requires qualified personnel to install

•    You need adding another faucet for filtration

•    You need to drill an extra hole to fix filter faucet

•    They take up under sink space   

Our top pick of the best under sink water filter

under sink reverse osmosis

Under sink reverse osmosis

Home Master TMAFC Artesian

undersink reverse osmosis

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Summary 

Home master reverse osmosis filter system uses innovative design to solve the most common problem found in traditional RO systems. Some of the issues it addresses are the following:

  • Slow flow rate –

Tradition RO system has slow water flow rate but home master system flow rate is twice faster than traditional RO system.

  • Canister filter housing leaks-

Traditional RO system canister filter housing is designed where only the filters are changed and not whole housing.

 With time sediment, microorganism and other         contaminants can accumulate in the housing causing it to leak and fail.

Home master system uses modular all in one design where the filter is incorporated with the housing. during the filter change time both filter and housing are disposed.

The annual change reduces contaminants build up in the housing and therefore eliminate leaks.

  • Slightly acidic water

Tradition RO system produce demineralized water that is slightly acidic.

When acidic water stays in the storage tank the acid attack the rubber bladder and dissolves some of it. This is known as tank degradation and also affect taste of water.

The home master system has two point of remineralization stages which adds minerals in your water making the water alkaline. therefore no tank degradation and produce water with great taste.

This system filters water in seven stages which remove  chloramines, chlorine, chemicals, heavy metals, dissolved solids, pharmaceuticals, and other contaminants. 

The system 7-stages include: 

Stage: (1) 5 micron spun poly

Stage: high holding depth sediment water filter

Stage: coconut shell granular activated carbon water filter.

Stage: catalytic carbon

Advance carbon media known as catalytic carbon which is better than ordinary carbon pre-filter making it effectively remove stubborn chemical disinfectant like chloramines.

Stage: 2 remineralization

The system has two different point of remineralization process. One occurs when water travels to the storage tank and the other one when the water travel to the faucet.

At both point of remineralization calcium and magnesium minerals are added for great taste.

Remineralization help prevent storage tank from degradation and help increase PH level making your water alkalinity.

Home master system filter is easy to change and are changed only once in a year or after every 2000 gallons. You can buy replacement filter using the link below

The system has modular all-in-one design that require no wrenches, heavy tool or force to loosen canister shut.

Its modular design incorporate both filter and housing together so when changing everything is disposed you do not need tool to loosen the housing to remove the filter.

The filter is fixed using push-in fittings which is a secure, quick and painless filter change.

It includes a non-electric permeate pump to improve system efficiency further. Also, this help in reducing water waste and increases water production.

In the package include RO membrane, filters, storage tank,  3/8 feed water adapter with shut-off valve, chrome RO faucet, RO faucet adapter, drain saddle and installation instructions.

Home Master is available in other option which is still Undersink filters

Check the other two option on Amazon

Home Master TMHP HydroPerfection Undersink Reverse Osmosis Water Filter System

Home Master TMAFC-ERP Artesian Full Contact Undersink Reverse Osmosis Water Filter System

How to install Home Master TMAFC Artesian Full Contact Undersink Reverse Osmosis Water Filter System

Express Water filter – best for well water

under sink reverse osmosis for well water

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Summary 

The express water filter system is a Reverse Osmosis Filtration System that filters water in 5 stage. The stages include:

•    5 Micron Melt-blown Polypropylene Sediment- this is stage 1 of the system that removes dirt, dust, sand, and rust.

•    GAC Activated Carbon Filters and Micron Carbon Filters- stage two and three which chlorine, volatile organic chemicals, and odor-causing compounds.

•    Thin Film 50 GPD RO Membrane- stage-4 that focuses on removing lead, arsenic, chromium, fluoride, TDS, and radium

•    Inline Granular Carbon Filter- stage -5 is a final process that comes right before faucet helping remove any possible odor and bad taste.

The RO membrane, Post Carbon, and Alkaline filter are replaced after one year while Sediment, Carbon Block, Granular Activated Carbon are replaced twice a year.

The express water filter has unique features such:

•    Double Sealed Filters to preserve your filters and your kitchen.

•    Our Leak Stop Valve shuts off water flow if excess water is detected

The whole system is 100% lead-free and BPA-free including extra parts provided

Comes with an extra set of 4 filters and an additional replacement set is Industry Standard & Universal for Consumer Security.

It has one year warranty and satisfaction guarantee with USA Technical Support in California 800-992-8876

This system filters well water and tap water.

It produces 50 gallons of pure water per day which is enough for the whole family, and you get water faster from your tap at 0.8 GPM.

In the pack include storage tank (4gallon), tank stand, all filters needed, extra-4 replacement filter and filter housing wrench

The tank can be installed under the sink, basement or any other remote location but you may need additional tubing or a delivery pump depending on how far away you plan to install or if you plan to link to a refrigerator.

This system is compatible with 3/8″ and 1/2″ under sink connections and Operates on 40-80 PSI water pressure but you may need a Booster Pump or Pressure Regulator depending on your water pressure.

Express water is available in 6-stage, 11 stage, 10 stage and 5-stage

iSpring 6-Stage Under Sink Reverse Osmosis  RCC7AK

under sink water filter reverse osmosis

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Summary 

  • Contaminants removed: arsenic, asbestos, chlorine, hormones, fluoride, lead, mercury, sodium, bacteria, giardia, viruses
  • Filter life – Sediment & carbon filter- 6months Ro membrane 2-3 years
  • Replacement filter – iSpring F9K 1-Year Replacement Supply Filter Cartridge 
  • Filter Stages-6 stages 

The I-spring system is six layered filter system that help prevent contaminants such as  arsenic, asbestos, chlorine, hormones, fluoride, lead, mercury, sodium, bacteria, giardia, viruses and more.

The six layered system include:

Stage 1-sediment filter helps remove dirt, rust, sand, and other particles. It is replaced after 6-months

Stage 2- Carbon KDF (GAC) filter removes chlorine, halide, organic contaminants, odors. It is replaced after 6-months

Stage 3- Carbon block (CTO) filter removes any remaining chlorine, tastes, and odors. It is replaced after 6-months

Stage 4 -RO membrane need to be changed every 2-3 years

Stage 5- Fine GAC filter final polishing before filtered water is delivered in your faucet.

Stage 6- Alkaline Remineralization filter restores healthy minerals and a natural alkaline balance, while also producing a more natural taste.

If you want to buy a replacement filter you use the link below

iSpring F19K75 2-Year Filter Replacement 

The first stage has Transparent 1st Stage Housing which allows visually inspecting the sediment filter and viewing the contaminants being removed from your water.

Also, transparent housing helps to know it is time for a filter change before a problem occurs.

Push to connect fittings, well organized written instructions, instructional videos, access to iSpring’s unparalleled technical support and color coordinated tubings simplify the installation process and prevent leaking.

In the package includes:

  • Machine head with RO housing, 5th stage FT15, and 6th stage FA15
  • Pre-filter Housings (2 opaque 1 transparent) & Housing wrenches
  • Complete filter pack including Alkaline pH filter
  • 3.2-gallon pressurized tank (2.5-gallon holding capacity)
  • Lead-Free brushed nickel faucet
  • 4-Color tubings (1/4″ OD) & Spare fittings & O-rings
  • Feed water adapter (fits both 1/2″ NPT & 3/8″ COMP)
  • Drain saddle & Water detector

A lead-free, solid brass faucet with a brushed nickel finish is included which is easier to mount on the counter as the primary source of drinking water, but output lines can also be connected to your ice maker, coffee maker

This high capacity I-spring reverse osmosis system is certified by NSF/ANSI 58 to reduce impurities such as lead, chlorine, fluoride, arsenic, hormones, asbestos, calcium, sodium, bacteria, giardia and viruses.

More reverse osmosis water filtration system under sink

FS-TFC Reverse Osmosis Water Filtration System Under Sink Water Filter 5-Stage 

NU Aqua Platinum Series Deluxe High Capacity 100GPD 5-Stage Under Sink Reverse Osmosis 

METPURE Versatile Reverse Osmosis Water Filtration System 

convectional

Convectional under sink water filter with the dedicated faucet

All the below filter come with faucet so you don’t spend extra money to buy faucet 

APEC WFS 1000

under counter water filter

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Summary 

  • Contaminants removed: bad odor, colors, chlorine, taste, particles, dust, and rust
  • Filter life – 12 months
  • Replacement filter – APEC FILTER Replacement Pre-Filter 
  • Filter Stages-3 stages 

APEC WFS-1000 Purifies water in 3 stage:

Stage 1: Polypropylene sediment filter which removes particles, dust, and rust

stage 2: Premium extruded carbon block which eliminates bad odor, colors, chlorine and taste

Stage 3: Premium extruded carbon block the same stage is repeated so as to provide excellent filtered water

The three filters last over 12 months and deliver filtered water directly to your tap water. There is no tank needed.

You can buy replacement filter using the link below

This system does not waste water or require regular filter flushing meaning all water that goes into the system goes straight to your cup. 

It is NSF certified that guarantees it provides quality water free from contaminants

Used to treat tap and well water

It has one-year satisfaction guarantee with lifetime support by certified WQA water specialist based in Ca

In pack contains chrome faucet which is 100% lead-free and JG food grading tubing approved by PLUS NSF and FDA

3M Aqua-Pure Under Sink Water Filtration System  best for well water/ non-chlorinated

under counter water filter

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Summary 

The 3M Aqua-Pure Under Sink Water Filtration System uses Advanced dual-stage carbon-block filtration which is NSF certified to reduce contaminants such as particulate, rust, lead, VOCs, MTBE, parasitic protozoan cysts, chlorine taste and odor.

The cartridge has sanitary twist-off design which makes easier and faster to change 3M Aqua-Pure cartridge.

This system is designed with built-in Automatic shutoff meter that automatically shut -off  when the system filters 625 gallons/ 2366 liters.

The automatic shutoff meter act as a reminder when to change cartridges.

It connects under the kitchen sink on the primary cold water line and cartridge is replaced after 6-months.

You can purchase Aqua replacement filter using the link below

3M Aqua-Pure Under Sink Replacement Water Filter AP-DW80/90

In pack contains installation hardware, faucet and pipe connections for easy installation

It is designed for effective use in both chlorinated (municipal) and non-chlorinated (well water) systems.

The filter change is determined by actual water use and incoming water quality.

In the package includes everything needed for installations such as a polished chrome dedicated faucet, quick-connect fittings, an attached mounting bracket, shroud, and tubing.

Also, included is a built-in shut-off valve that allows for changing the Sanitary Quick Change filters without shutting off the water supply.

Culligan US-EZ-1 EZ Undersink Drinking Water Filtration System

under sink water filter with dedicated faucet

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Summary 

  • Contaminants removed: particulates class III, chloride and removes bad taste and odor
  • Filter life – 3000 gallons/ 12 months
  • Replacement filter – RC-EZ-1 filter cartridge
  • Filter Stages-1 stages 

Includes dedicated faucet that can be installed in most sinks providing cleaner filtered water for cooking or drinking

 It comes with RC-EZ-1 filter cartridge effectively removing contaminants such as particulates class III, chloride and removes bad taste and odor from water.

The included RC-EZ-1 filter cartridge is tested and certified by NSF for the reduction of Chlorine Taste and Odor and Nominal Particulate Class III.

With quick connect fittings, twist on and twist off makes easier to change the filter of the Culligan US-EZ-1 EZ Undersink Drinking Water Filtration System.

Also, the quick-connect fittings ensure the filter stays in place until it needs to be changed, so you don’t need to worry about hidden leaks or spills

The cartridge can filter up to 3,000 gallons of water or can last for 12 months.

It has a filter change sticker which reminds you of time to change the filter.

Included in the package are Filter head with built-in bracket, US-EZ-1 Water filter cartridge, mounting screws, water supply adapter, chrome, Lead-free faucet and fittings, 1/4-Inch plastic tubing, cartridge change and reminder sticker.

Aquasana 3-Stage Under Sink Water Filter System

Best under sink water filter with a dedicated faucet

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  • Contaminants removed: rust, sediment,  silt, pharmaceuticals, herbicides, pesticide, other volatile organic chemicals, heavy metals (lead and mercury), chloramines (the byproduct of chlorine and ammonia used in water disinfection), giardia and cryptosporidium.
  • Filter life – 800 gallons
  • Replacement filter – Aquasana AQ-5300R 3-Stage Under Sink Water Filter Replacement Cartridges
  • Filter Stages-3 stages 

The Aquasana water filter cleans water in 3-stage;

Stage 1: 20 Micron pre-filter catches rust, sediment, and silt. 

Stage 2: Activated Carbon Reduces organic chemicals (pharmaceuticals, herbicides, pesticide), other volatile organic chemicals, improves the taste of your water and removes chlorine odor.

Stage 3: Catalytic Carbon removes heavy metals (lead and mercury), chloramines (the byproduct of chlorine and ammonia used in water disinfection), giardia and cryptosporidium.

Full system is certified by NSF certified to standards 42, 53, 401 +P473 to remove contaminants such as  lead, mercury, pesticides, pharmaceuticals, chlorine taste, odor, particulates, cryptosporidium, asbestos, herbicides, detergents, pharmaceuticals, and other volatile organic chemicals

No water is wasted while using this system and no harmful contaminants are added back into your water.

Sediment filter help reduce clogging, therefore increases capacity. The sediment filter gives 800 gallons of clean water.

It comes with a dedicated faucet made of metal and lead-free. The faucet is brushed nickel, bronze, or chrome so you can choose that best to match your kitchen decor.

Filters are easy to change no need to disconnect hoses or water lines, filter housing easily twists off

It has indicating device that alerts when it is time to change your filter.

You can purchase replacement filter using the link below

Aquasana AQ-5300R 3-Stage Under Sink Water Filter Replacement Cartridges

New Wave Enviro-30008 10 Stage Unit Undersink-Mounted Water Filter

under sink water filter

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The New Wave Enviro is 10-stage water filtration system.

The 10 stage system eliminate harmful contaminants such as chlorine, trihalomethanes, organic and inorganic arsenic, mercury, lead, pesticides, and herbicides.

Filters are supposed to be replaced every 12 months or 1,500 gallons.

Doulton W9330958 SuperCarb Under Sink Filter System

Doulton under sink filter

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  • Contaminants removed: fine particulate matter, bacteria, cysts, turbidity,  pathogenic bacteria, hydrogen sulfide, lead,chlorine, taste, odor and organic compounds.
  • Filter life – N/A
  • Replacement filter – each stage filter sold separately
  • Filter Stages-4 stages 

The Doulton water filter is connected under the counter utilizing Doulton ceramic technology.

Each package comes with an UltraCarb Candle filter, durable plastic housing, and faucet. It also comes with everything that is needed for a standard installation.

The whole system is NSF certified, and the faucet is CA prop 65 approved

The Doulton super carb is a four-stage system with a combination of ceramic filtration making it possible to remove bacteria, E-coli, heavy metal, fluoride, chlorine and organic

1st stage Doulton Ultracarb ceramic which reduces fine particulate matter, bacteria, cysts, and turbidity. Doulton Ultracarb ceramic replacement filter

2nd stage Doulton® ceramic filter candles remove suspended solids, pathogenic bacteria, hydrogen sulfide, and lead. Doulton® ceramic filter candles replacement filter

3rd stage activated carbon block removes chlorine, taste, odor and organic compounds.

4th stage Ion exchange resin that reduces Lead and other heavy metals.

Frizzlife Under Sink Water Filter 

Under Counter filter

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  • Contaminants removed: lead, heavy metals, chlorine, chromium, mercury, rust, volatile organic compound, carcinogens, turbidity, odor and bad taste.
  • Filter life – N/A
  • Replacement filter – Frizzlife FZ-2 Replacement Filter Cartridge 
  • Filter Stages-2 stages 

The Frizzlife Under Sink Water Filter is a two-stage water filtration system that helps reduce lead, heavy metals, chlorine, chromium, mercury, rust, volatile organic compound, carcinogens, turbidity, odor and bad taste.

The two-stages include

  • Sediment filter cartridge with 5-micron precision reduces particles such as sand, silt, and rust from the water.
  • Block carbon filter cartridge with 0.5-micron precision that reduces 99.99% of LEAD, CHLORINE, ODOR, and PARTICLES from the water.

It comes with 3/8″ direct connect hoses that fit standard 3/8″ feedwater valves under US kitchen sinks. It also comes with a 3/8″ to 1/2″ converter fittings allowing the system to fit directly to the existing both 1/2″ and 3/8″ cold water lines and faucet under your sink.

The system installation requires no plumbing but utilizes quick-change twist design which makes installation easy and takes fewer minutes.

The filter cap is designed with a BUILT-IN shut off valve. You do not need to shut-off water supply whenever you are replacing the cartridge.

During filter replacement, you only need to replace the filter cartridge and not the whole house.

Replacement cartridge is available using the link below

Frizzlife FZ-2 Replacement Filter Cartridge For MP99, MK99 Under Sink Water Filter- https://amzn.to/38G5s3t

It has a flow rate of 2.0GPM @40 psi and the cartridge lasts 2 years or 1,600 gallons water.

It comes with a lead-free stainless faucet with quick fittings.

Whirlpool WHADUS5 Under Sink Water Filtration System 

Convectional

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  • Contaminants removed: chlorine taste and odor, sediment, cysts, lead, and chemicals.
  • Filter life – 6 months
  • Replacement filter – N/A
  • Filter Stages-2 stages 

The Whirlpool WHADUS5 is certified to reduce numerous contaminants including chlorine taste and odor, sediment, cysts, lead, and chemicals.

It features EZ-Change Indicator Light that notifies you when it is time to change filters.

The filter lasts for 6-months.

Ecosoft 3 Stage Under Sink Water Purifier Filtration System  

under counter filter

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Ecosoft is a 3-stage water filtration system. The 3-stages include:

1-stage: 5-micron polypropylene sediment filter which removes dust, rust and sediment larger than 5-micron

2-stage: ecomix D531 filters which reduce chlorine byproduct, salinity, lead, iron, manganese, and tanins.

3-stage: activated coconut-based carbon shell filter that helps remove chlorine taste and odor.

The filter last for 6 months or 400 gallons. You can buy replacement filter using the link below.

Ecosoft 3-Stage Under Sink Water Filter Replacements 

More

iSpring US31 3-Stage Under Sink High Capacity Tankless Drinking Water Filtration System

Watts Premier WP500313 2-Stage Undercounter 

Brondell H2O+ Coral UC300 Three-Stage Undercounter Water Filtration System

Whirlpool WHADUS5 Under Sink Water Filtration System with Chrome Faucet

best under sink direct connect water filter 

Direct  inline under sink water filter

Filtrete Advanced Undersink Water Filtration System

best Under sink water filter with no dedicated faucet

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This system removes contaminants such as chlorine, sand, soil, silt, microbial cysts, odor, and tastes.

There is no dedicated faucet easily connect to your kitchen or bathroom faucet.

It is NSF certified thus guarantee quality water and maintains full water flow on your existing faucet at 2.25 GPM.

The system is easy to install; the filter is changeable and last for only six months or after 2000 gallons.

With easy push-fitting connections and 1/4 turn makes easier to change filter replacements of this system.

Woder 10K Ultra High Capacity Direct Connect Water Filtration System

Under sink direct connect water filter/ quick connect sink filters 

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  • Contaminants removed: Heavy metals, Chlorine, turbidity, Chromium 6, Volatile Organic Compounds, Mercury, lead, odors and bad tastes
  • Filter life – 10,000 gallons or 3-years.
  • Replacement filter – N/A
  • Filter Stages-1 stages 

The Woder water filtration system eliminates Heavy metals, Chlorine, turbidity, Chromium 6, Volatile Organic Compounds, Mercury, lead, odors and bad tastes.

It comes with direct connect hoses that fit standard 3/8” water valves under kitchen and bathroom sinks.

The hose is installed directly to the existing cold water valve and faucet stem under your sink with no plumbing required.

This water filtration system will last 10,000 gallons or 3-years.

The woder filters are made with NSF approved materials and approved by WQA to NSF/ANSI 42  for chlorine taste and odor.

In addition to certification it is also certified by WQA to NSF/ANSI 372 for lead free compliance.

The certification  guarantee the quality of Woder filtered water,

Use the system with municipal treated cold water only but do not use with hot/ salty/softened or well water

The system has flow rate of 3GPM @65 psig.

Complete kit contain Filter body, inlet hose – 3/8 female compression by 1/4 standard pipe thread, outlet hose- 3/8 m compression by 1/4 standard pipe, clip and screw.

It is available in different sizes such as 

Woder WD-S-8K-DC Water Filtration System – It has a Flow rate 2GPM @65 psig and lasts for 3 years or 8480 gallons.

Woder WD-S-5K It has a Flow rate 2GPM @65 psig and lasts for 3 years or 5000 gallons.

Woder WD-4K Ultra High CapacityIt has a Flow rate 2GPM @65 psig and lasts for 3 years or 4000 gallons.

CuZn UC-200 Under Counter Water Filter 

under counter

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  • Contaminants removed: organic, inorganic chlorine, heavy metals (lead, mercury, chromium VI, cadmium, etc.), herbicides, pesticides, sediment, algae, molds, bad taste, and odor.
  • Filter life – 50,000 gallons or 5 years.
  • Replacement filter – N/A
  • Filter Stages-1 stages 

This filter works beneath any home or office sink to filter up to 50,000 gallons of cold water, and the filter is replaced after every 50,000 gallons or 5 years.

The CuZn UC-200 Under Counter Water Filter is designed for use with Municipal Water, not Private Well Water.

It takes a few minutes to install and connects directly to your kitchen sink cold water line. 

All you will require is an Adjustable Wrench for Tightening Connections.

The UC-200 is bacteriostatic no bacteria or mold can grow inside this system.

It filters water in 3-stages which include Micro Sediment Membranes, KDF-55 filtration media, and Coconut Shell Carbon.

The filtration media is tested to NSF standard to reduce a wide variety of contaminants such as organic, inorganic chlorine, heavy metals (lead, mercury, chromium VI, cadmium, etc.), herbicides, pesticides, sediment, algae, molds, bad taste, and odor.

The CuZn UC-200 does not remove beneficial mineral such as calcium & magnesium.

Since presence of calcium & magnesium make your water hard and Cuzn uc 200 does not remove them, it is not right system for areas with hard water.

It has a flow rate of 2gpm

How to install CuZn UC-200 Under Counter Water Filter

Watts Inline Water Filter 

inline water filter

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  • Contaminants removed: Chlorine, odor, contaminants, sediment, and particulates
  • Filter life – 20,000 gallons
  • Replacement filter – N/A
  • Filter Stages-1 stages 

Watts Inline Water Filter is great for under the sink, Refrigerators, Ice-makers, RV, Campers, Boats, Water fountains, Water coolers, and commercial coffee makers.

The INLINE CARTRIDGE comes with 10-inch KDF Inline Filter and 1/4 inch brass connectors (QTY 2). Connectors fit ¼ inch water line and make it easier to connect easily to existing plumbing. 

It is NSF and WQA certified for bacteriostatic properties

The filter lasts up to 20,000 Gallons and helps reduces chlorine, odor, contaminants, sediment, and particulates for better taste and healthier drinking water. 

More direct in line system

Whirlpool WHAFFS Sink Water Filtration System 

Frizzlife Under Sink Water Filter System  

Culligan US-600A Undersink Drinking Filtration System

Hansing Under Sink Water Filter, High Flow Water Filtration System  

Epic Smart Shield Under Sink Water Filter System 

InSinkErator F-1000S Under Sink Water Filtration System Installation Kit

Replacement

Under sink system Replacement filter

Tap Master ISetTMA8 Artesian And HydroGardener Replacement Water Filter Change Set

Replacement filter

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Tap master changed the name to home master so this is the replacement filter for the home master system.

The replacement filter set is for Tap Master Artesian, Tap Master Artesian Full Contact, Home Master Artesian, Home Master Artesian Full Contact, HydroGardener.

It is certified to NSF standard 42 for chlorine reduction and Class V particulate reduction.

The filter also removes up to 98-percent of chemicals, including VOCs, TOCs, and chlorine.

This filter is supposed to be replaced after treating 2500 gallons of water or 1-year.

The box includes (1) 5 micron spun poly, high holding depth sediment water filter, (1) 5-micron coconut shell granular activated carbon water filter, and (1) 5-micron Artesian remineralization and coconut shell granular activated carbon water filter.

iSpring F9K 1-Year Replacement Supply Filter Cartridge 

Replacement filter

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The ispring replacement cartridge is a supply of one year for a 6-stage RO system.

In the pack contain 9-pack of replacement filter which include:

  • 2x sediment filters- captures silt, sand, dust, and dirt
  • 2x granular activated carbon filters-remove odor and improve the taste
  •  2x carbon block filters- absorbs organic chemical and chlorine, therefore, remove odor and improve the taste
  • 1x post-carbon filter- works the final stage of the system to absorbs organic chemical and chlorine
  • 2x alkaline filters- restores healthy minerals and produces balanced alkalinity. The filter lasts for 6-12 months.

This pack does not contain the Ro membrane because the filter is replaced after 2-3 years. To get a replacement filter with RO membrane take a look at 2-year F19K75 or 3-year F28K75 supply pack.

The Ispring replacement filter is suitable for the iSpring RCC7AK, RCC7P-AK, and most other RO systems that use standard sized filter housings including Flowmatic, PuROLine, Crystal Quest, and Apec.

APEC FILTER Replacement Pre-Filter 

Replacement filter

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APEC replacement filter is compatible with APEC RO-45, RO-90, RO-PH90, RO-PERM, RO-PUMP, RO-Hi, WFS-1000 and all other standard sizes under counter reverse osmosis systems

The set contains the following filter 

  • 1st stage polypropylene sediment filter to remove dust, particles, and rust
  • 2nd & 3rd stage extruded carbon block filters to remove chlorine, taste & odor

The filter is made in the USA and lasts for 12 months.

APEC replacement filter is available in 2-set (2 sediment filter, 4 2nd & 3rd stage extruded carbon block filters)

3M Aqua-Pure Under Sink Replacement Water Filter 

Replacement filter

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The 3M Aqua-Pure Under Sink Replacement Water Filter is compatible with the Aqua-Pure AP-DWS1000 system

The replacement filter is advanced dual-stage carbon-block filtration that helps reduce particulate, chlorine taste and odor, lead, parasitic protozoan cysts, volatile organic compounds (VOCs) and methyl tert-butyl ether (MTBE).

It is replaced after 625 gallons/2366 liters or six months.

These cartridges have a Sanitary Quick Change (SQC) design that provides fast and easy cartridge change-outs with minimal effort.

Culligan RC 1 EZ-Change Basic Water Filtration Replacement Cartridge

Replacement filter

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The Culligan RC 1 EZ cartridge works as a replacement filter for Culligan US-EZ-1, US-EZ-3, and US-EZ-4.

It is NSF tested and certified to NSF/ANSI Standard 42 for the aesthetic to reduce particulates class III and chlorine bad taste and odor from water.

Features twist-on and twist-off filter mechanism make it easy to change out when the filter needs to be replaced.

The quick-connect fittings make installation easy; no need to hire a professional plumber.

It is replaced after 12 months or 3,000 gallons.

Culligan system also offers other under sink filter such as 

Culligan Premium RC 4 EZ – it is replaced after filtering 500 gallons or 6-months. The Premium RC 4 EZ removes chlorine taste and odor, chloramine taste and odor, sediment, lead, cysts, VOC and mercury.

Culligan advanced RC 3 EZ – it is replaced after filtering 500 gallons or 6-months. The advanced RC 3 EZ removes chlorine taste and odor, sediment, lead and cysts

Aquasana AQ-5300R 3-Stage Under Sink Water Filter Replacement Cartridges

Replacement

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This is a replacement filter for 3-stage of the following system AQ-5300.55, AQ-5300.56, and AQ-5300.62.

No plumbing is required or disconnecting hoses or water line when replacing the filter. Simply twist off the filter housing, replace the filter, and twist back on.

It is certified to NSF standards 42, 53, 401, and P473 to remove lead, mercury, asbestos, pesticides, pharmaceuticals, and more.

The three filter include 

  1. Pre- filter-removes sediment, rust, and silt
  2. Activated carbon – which reduces organic chemicals like pharmaceuticals, herbicides, pesticides, and other volatile organic chemicals
  3. Catalytic carbon – reduces heavy metals like lead and mercury, chloramines, asbestos and chlorine resistant cysts like giardia and cryptosporidium. 

All the above filter are capable of filtering 600 gallons or replace it after 6 months

New Wave Enviro 10 Stage Plus Water Filter System and Cartridge

Replacement filter

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This filter is for New Wave Enviro 10 Stage Under Sink Water Filter System.

The 10 stages include:

  1. Stage 1 – 30-micron sponge filter which removes larger solids (sediments) such as rust.
  2.  Stage 2 – 8 oz. of KDF-55. KDF-55 is a patented alloy which removes free chlorine and some heavy metals, thereby prolonging the life of the filter and is an excellent Bacteriostat.
  3.  Stage 3 – 10 micron felt pad which traps smaller floating solids and separates the layers, preserving their integrity.
  4.  Stage 4 – 30 cubic inches of ultra-fine mesh, superior coconut shell, and granulated activated carbon. Granulated activated carbon has long been accepted by the E.P.A. and others as the premier, cost-effective way to remove chlorine, bad odors, and color from drinking water. G.A.C. also removes organic contaminants such as pesticides, herbicides, arsenic, mercury, and trihalomethanes – a cancer-causing organic pollutant.
  5.  Stage 5 – 10 micron felt pad for fine sediment removal.
  6.  Stage 6 – 7 cubic inches of ion exchange resin which removes lead to below minimum E.P.A. standards.
  7.  Stage 7 – An additional 30 micron felt pad provides an extra buffer against floating sediment of any kind.
  8.  Stage 8 – 7 cubic inch bed of G.A.C. which provides extra protection against cancer-causing organic pollutants.
  9.  Stage 9 – 2 oz. of calcite which raises the water’s pH and lowers acidity. It also increases alkalinity, which many nutritionists recommend.
  10.  Stage 10 – 1-micron absolute depth filter. A filter with a micron rating this small screens out cysts and protozoa, (including Giardia and Cryptosporidium), and gives the filtered water a sparkling clarity

Filtrete 3US-AF01 Standard Under Sink Quick Change Water Filtration Replacement Filter

Replacement filter

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Filtrete under-sink replacement filter is NSF certified to eliminate chlorine taste and odor, sand, sediment, rust and soil from the water.

The filter lasts 6 months or 2,000 gallons and is easy to change with no tools.

The Filtrete also offers more model of replacement filters such as 

Filtrete Maximum Under Sink Water Filtration Filter

Filtrete Advanced Under Sink Quick Change Water Filtration Filter

Frizzlife FZ-2 Replacement Filter Cartridge 

Replacement filter

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The Frizzlife FZ-2 Replacement Filter Cartridge is a two-stage filter, which includes:

  • Sediment filter cartridge with 5-micron precision reduces particle material such as sand, silt, and rust from the water. 
  • Block carbon filter cartridge with 0.5-micron precision that reduces 99.99% of LEAD, CHLORINE, ODOR, and PARTICLES from the water.

This filter has a unique technology that removes contaminants while leaving important minerals such as calcium, potassium, and magnesium.

It is a replacement filter for Frizzlife MP99 water filtration system and MK99 water filter system

Filter replacement that lasts 1 year or 1,600 gallons of water

What you should look when buying under sink water filter

There are a few features you should consider when buying under sink water filter. These include:

  • Types of under sink water filter

There are two different types of under sink water filter

  1. convectional 
  2. simple/ direct inline.

Both types use cartridge combined with other technologies to provide filtered water, but installation is different.

Simple/ direct inline under sink water filter
As the name suggests the simple under sink water filter works effectively to remove all contaminant but how it is being installed is not complicated/ it is simple.

It is mounted directly into the main water line under the sink in your kitchen.

All the cold water that gets in your kitchen sink main water line is diverted through the filter to be filtered.

The simple system is installed in already existing faucet.

Advantages of direct inline

  • It doesn’t require a separate faucet for filtered water and unfiltered water.
  • This type is easy to install you do not drill a hole for an extra faucet.

Disadvantages of direct line

  •  It is connected to the kitchen sink main cold water pipe/line so a lot of water is filtered so you will have to change the filter more often therefore maintenance can be expensive.
  • If the water reaching the filter has high pressure it will overwork the filter and some water will pass through unfiltered.

Conventional

The conventional is the opposite of simple its installation is complicated.

You need to divert kitchen sink main cold water pipe/line to the filter using a connection.

When the water is filtered, it is sent to the separate faucet installed in the sink.

You will have two taps one for cold water that is filtered and the other one for cold unfiltered water.

This type will make your filter last longer because not all water that gets to your kitchen sink main cold water pipe/line is filtered.

The convectional system the pressure is reduced so all water that enters the system will get filtered.

Disadvantages

  • The of this type you require a sink that has two faucet holes if not drill an extra hole in the sink
  • It reduces the water flow rate 
  • Requires plumbing for you to install the system.
  • The conventional system, the water pressure is low, therefore, you can wait for a few minutes before you get a full glass of filtered water.
  • Which contaminants it removes

Under sink water filter has a combination of the filter with different technologies which each removes the specific contaminant.
Not all are designed the same so make sure you purchase the system that filters contaminants present in your water.

You can use a water test kit to know contaminants present in water.

  • Easy to install and maintain

Most of these systems are easy to install they come with the DIY installation process that you can do alone at home without hiring a professional.

Since the system use cartridges that require to be replaced after a period the replacement should be smooth and straightforward.

  • Filtration technology

Under sink water filter removes contaminants using different techniques such as reverse osmosis, reduce hard minerals and some brands go up to six stages which include alkaline remineralization.

Check the system that has most filtration technology because will help save a lot of money and space.

Also, the more the filtration stages the better because the system will provide quality filtered water.

  • Filter life

Under sink water filter use cartridges to filter  contaminants  in the water.

The cartridge don’t last forever so requires to be replaced.

You should know how long the filter will last for it to be replaced.

Some brands need their filter to be replaced after filtering specific gallons or few months, but this can be different due to some factors such as quality of water and amount of water filtered. 

You should follow the manufactures instruction on when to change the filter.

Some companies have filter indicator to inform when it needs to be replaced.

  • Water flow/ pressure

As we said earlier if your water pressure is high and you are using simple system some contaminants will escape and pass through unfiltered.
In the conventional system, the water pressure might be low, therefore, you can wait for a few minutes before you get a full glass of filtered water.
Know the flow rate of your system or water supply pressure before buying the filter.

  • Independent certification

Independent certification is the only way to guarantee your water system removes contaminants effectively and is made with quality material.

There are independent bodies such as NSF and WQA that test and approve most water systems.

Which contaminants do under sink water filter remove

The under sink water filter use cartridge combined with other technologies to remove contaminants such as:
Bad Odor and taste
Since the system has a carbon activated filter which helps remove chlorine odor and taste.
Also, activated carbon filter removes organic, inorganic chlorine, heavy metals, herbicides, pesticides, algae, and molds.
Removes heavy metal
Carbon filter combination removes heavy metals such as lead, mercury, chromium VI, and cadmium.
Particulate removal
The system has a polypropylene sediment filter which removes particles, dust, silt, and rust.
Reduce hard minerals (calcium and magnesium) that form scale on home appliances

Under sink water filter installation

I have prepared a list of website to guide step by step how to install under sink water filter.

DIY network

Life Hacker

Instructables

This video might be a help too.

Under sink water filter is one of the best ways to make sure your family always has enough clean water for drinking regardless of the contaminant from treatment plant or pipes.

Hoping our review of the best under sink water filter will help find the right product you need for your home.

If there is a brand you want us to add to the list above, please let us know in the comment section below.

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