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Best inline under sink water filter (without separate faucet)

Want to install a water filter right underneath the kitchen or bathroom sink without drilling the countertop or without a separate faucet on the countertop? Inline under sink water filter is the right choice.

inline under sink water filter

Inline under sink water filter comparisons

 NameImagefilter lifeReplacement filterWhere to buy
1Woder under sink water filtration system10,000 gallons or 3-years.No replacement filter buy the system againAmazon
2CuZn UC-200 Under Counter Water Filterunder counter water filter50,000 gallons or 5 years.No replacement filter you replace the whole thingAmazon
3Watts Inline Water Filterinline water filter20,000 gallonsAmazon
Filtrete Advanced Undersink Water Filtration System2000 litersAmazon
3M Aqua-Pure AP2006 monthsAmazon
Waterdrop 15UA Under Sink Water Filter 16000 gallonsAmazon
Buy Waterdrop
AQUACREST 5KDC 5,000 gallonsAmazon
GE GXK285JBL 300 gallonsAmazon
APEC Water Systems CS-2500 12 monthsAmazon
PUREPLUS Under Sink Water Filter22000 gallonsAmazon
Pure water Under Sink Water Filter1500 gallonsAmazon
Wingsol Under Sink Water Filter  8000 gallonsAmazon
iSpring US21B Commercial Grade 8000 gallonsAmazon
Whirlpool WHAFFS Sink Water Filtration System 6 monthsAmazon
Frizzlife Under Sink Water Filter System  12monthsAmazon
Culligan US-600A 1000 gallonsAmazon
Hansing Under Sink Water Filter13000 gallonsAmazon
Epic Smart Shield Under Sink Water Filter System 2464.3 Liters
Amazon
InSinkErator F-1000S 6 monthsAmazon

Most under sink water filter come with a separate faucet for installation at the countertop and requires drilling of the hole on the countertop.

Inline under sink water filter is installed into the water line under the sink (usually kitchen or bathroom sink) and flows directly to your existing faucet. It requires no drilling and dedicated faucet

If you are staying on a rental unit or have granite slabs inline under the sink water filter will help solve the problem and enjoy filtered water.

It is called under sink water filter without a separate faucet or Under sink water filter with no drill.

Advantages of inline under sink water filter

  • No drilling required
  • You do not require a separate faucet
  • Saves under the counter and countertop space

Disadvantages of inline under sink water filter

  • Wastage of filtered water

The system is connected to the only faucet you are using to clean dishes that do not require filtering, therefore, waste a lot of filtered water.

Wastage of filtered water problem can be solved if you mixer tap or 3-way drinking water faucet.

A mixer tap has 2 hoses (for hot water and cold water). You can connect the filter to the hot water hose when you turn on the hot water side it will dispense filtered water. The method work if you do not have a water heater.

Shop for the mixer tap

A 3-way drinking water faucet has 3 hoses (for hot, cold, and filtered water)

Shop for the 3-way drinking water faucet.

  • The cartridge does not last long since you filter all water from the kitchen faucet

What is the best inline under sink water filter?

The best inline under sink water filters are:

  1. Filtrete Advanced Undersink Water Filtration System
  2. Woder 10K Ultra High Capacity Direct Connect Water Filtration System
  3. CuZn UC-200 Under Counter Water Filter 
  4. 3M Aqua-Pure AP200
  5. Waterdrop 15UA Under Sink Water Filter 
  6. AQUACREST 5KDC Direct Connect Under Sink Water Filter 
  7. GE GXK285JBL
  8. APEC Water Systems CS-2500
  9. PUREPLUS Under Sink Water Filter
  10. Pure water Under Sink Water Filter
  11. Wingsol Under Sink Water Filter  
  12. iSpring US21B Commercial Grade
  13. Watts Inline Water Filter 
  14. Whirlpool WHAFFS Sink Water Filtration System 
  15. Frizzlife Under Sink Water Filter System  
  16. Culligan US-600A
  17. Hansing Under Sink Water Filter
  18. Epic Smart Shield Under Sink Water Filter System 
  19. InSinkErator F-1000S

Inline under sink water filter reviews

  1. Filtrete Advanced Undersink Water Filtration System

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

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

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

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

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

How to install Filtrete Advanced Undersink Water Filtration System

  1. Woder 10K Ultra High Capacity Direct Connect Water Filtration System

  • Contaminants removed: Heavy metals, Chlorine, turbidity, Chromium 6, Volatile Organic Compounds, Mercury, lead, odors, and bad tastes
  • Filter life – 10,000 gallons or 1-year.
  • Replacement filter – No replacement filter you buy the system again
  • 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 guarantees 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 a flow rate of 3GPM @65 PSIG.

The complete kit contains a 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 of 2GPM @65 psig and lasts for 3 years or 8480 gallons.

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

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

Woder 10K-JG-1/4 Inline Filter -Read review at the end of this article

How to Woder WD-10K-DC

  1. CuZn UC-200 Under Counter Water Filter 

  • 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 – No replacement filter you replace the whole thing
  • 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 minerals such as calcium & magnesium.

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

It has a flow rate of 2gpm

How to install CuZn UC-200 Under Counter Water Filter

  1. 3M Aqua-Pure, White 70020007418 Under Sink Full Flow Water Filter System AP200, 5528901

Summary

3M Aqua-Pure AP200 is NSF tested and certified to 42 standards.

This system helps reduce chlorine taste and odor

It is recommended to replace after every 6 months or as soon as you notice a reduction of flow rate/ change in odor or taste.

3M Aqua pure AP200 Replacement filter is 3M Aqua-Pure Under Sink Replacement Water Filter Cartridge AP217, Full Flow

  1. Waterdrop 15UA Under Sink Water Filter 

Waterdrop Direct Connect Undersink Water Filtration System uses innovative multistage filtration to remove contaminants such as chlorine, heavy metals, chemical impurity, sediment, and other large particles.

The multi-stage includes 

  • Polyester membrane
  • Activated carbon block 
  • KDF

The system is connected to a cold water supply and fits 1/2″ or 3/8″ FEMALE NPT thread.

It is certified by the WQA against NSF 372 and 42 standard

The installation and replacing filter process is user-friendly, with innovative push-to-connect fittings, the entire installation process takes less than 3 minutes. The twist-and-lock design ensures that you can replace the filter in 3 seconds.

When used with municipal the filter has a service life of 24 months or 16,000 gallons. Buy replacement filter using the link below

Waterdrop RF15 Replacement Filter Cartridge or buy from waterdrop website using this link For 15UA/15UB/15UC Under Sink Water Filter, NSF/ANSI 42 Certified, 16K Gallons High Capacity

Waterdrop direct connect is available in different models read our review of waterdrop under sink water filter

How to install Waterdrop Direct Connect Undersink Water Filtration System WD-10UA, WD-15UA, WD-17UA

  1. GE GXK285JBL Twist And Lock Under Counter Dual Flow Water Filtration System

GE GXK285JBL under counter water filtration system help reduce contaminants such as lead, chlorine taste, odor, select pharmaceuticals, and more.

If you are looking for the system you won’t forget when to change the filter this is a system for you. It features a filter replacement indicator light.

This system is easy to install without a plumber and a Twist-and-Lock design allows you to easily replace filters without tools or mess.

For better filtration, it is recommended to replace the filter every 6 months. Buy replacement filter using the link below

GE FQK2J Dual Flow Drinking Water Replacement Filters Light Gray

How GE GXK285JBL

GE Single Stage Under Sink Water Filter System GXK185KBL

This is GE Appliances Single-Stage Undercounter Water Filtration System.

It uses GE FQK1K Replacement Water Filter. The filter helps reduce lead, cysts, chlorine taste, odor, and select pharmaceuticals, VOCs, and contaminants.

Features Twist-and-Lock design that allows you to easily replace filters without tools or mess. The system is easy to install under your sink without needing a plumber.

It comes with Chrome Control Knob that allows you to turn filtered water off and on. The knob also features a filter replacement indicator.

For better performance, it is recommended to change the filter every 6 months.

GE Retail Parts, GERAN GE GXULQK Full Flow Water Filtration System

This is GE Appliances Single-Stage Undercounter Water Filtration System.

The system uses General Electric GXULQR Kitchen or Bath Filter that is IAMPO certified to reduce lead, sediment, and chlorine taste and odor from your tap water.

It features a Twist-and-Lock design that allows you to easily replace filters without tools or mess.

For better performance, it is recommended to replace filters every six months for best filtration results.

The system is designed to connect to the sink’s existing faucet and an installation kit is included for added convenience.

It includes a magnet filter reminder light that reminds you when its time to change the filter

  1. APEC Water Systems CS-2500 Ultra High Capacity Undersink Water Filtration System

APEC Water Systems CS-2500 effectively reduce lead, chlorine, heavy metals, taste, odor, and chemicals while leaving various minerals, like calcium, potassium, and magnesium.

The system is easy to install, it comes With Standard 3/8″ Hoses That Connect Directly To The Existing Cold Water Valve And Faucet Stem.

Features Quick Twist Connection Design For Easy Filter Replacement. Replace the filter after 5,000 gallons or every 12 months.

The replacement filter for the CS-2500 filtration system is APEC FI-CS-2500 Replacement Filter for CS-2500 Water Filtration System

It is NSF certified and for cold water only

Culligan Under Sink Direct Connect water filtration system

All below Culligan under sink system connect to the cold water line

  1. Culligan US-600A Under- Sink Drinking Water Filtration System with Filter

Culligan US-600A comes with a D-20A filter cartridge that helps reduce chlorine, bad taste/odor. The filter treats 1,000 gallons.

Buy Culligan D-20A filter cartridge

The package included filter housing assembly w/ mounting bracket, 3/8-inch tubing, 2 quick-connect elbows, SW-5A housing wrench, and D-20A filter cartridge

This Culligan US-600A is compatible with D-10A, D-20A, D-30A, and D-40A replacement cartridges.

The US-600A with D-20A is tested and certified by IAPMO against NSF/ANSI Standard 42 for the reduction of aesthetic chlorine taste and odor

Culligan 580009 US-DC-2 Filtration System

Culligan 580009 US-DC-2 Filtration System is NSF certified specifications for 42 and 53

It uses CULLIGAN US-DC2-R Under Sink Direct Connect Drinking Replacement UsDc2 WTR Cartridge that treats 2,000 gallons of water/ 6 months

The US-DC2 is tested by IAMPO to NSF for the aesthetic reduction of Chlorine Taste and Odor, Chloramines, and Nominal Particulate Class 1. Standard 53 for the reduction of Cysts, Lead, Mercury, VOC, MTBE, and Turbidity.

It has a flow rate of 2GPM

CULLIGAN US-DC1 Under Sink Connect Drinking Water Direct Conn WTR System

The system uses CULLIGAN US-DC1-R Under Sink Direct Connect Drinking Water System Replacement UsDc1 WTR Cartridge

It is tested by IAPMO to NSF 42/53

The system is installed in ¼ inch tubing and has a flow rate of 2GPM

Culligan US-DC3 Under Sink Direct Connect Premium Lead Filtration System

Culligan US-DC3 use Culligan US-DC3-R Direct Connect Premium Water Filter Replacement Cartridge

The filter helps remove bad taste, odor, chlorine, lead, and microbial cysts.

Replace the filter after treating 4, 750 gallons or 12-months.

This system has a flow rate of 1.5gpm.

The package includes Mounting Screws, Water Supply Adapter, Filter Cartridge, System Head with Attachable Bracket, 3/8 inch Plastic Tubing.

  1. PUREPLUS Under Sink Water Filter

PUREPLUS Under Sink Water Filter uses 6 in 1 special composite filter. The filter lasts for 5 years or after filtering 22,000 gallons of water.

The system is certified by IAPMO against NSF/ANSI 42. It is also certified against NSF/ANSI 372 by IAPMO because of using food-grade Lead-Free materials and BPA which meets Australian WaterMark, TUV, ROHS, and REACH

It fits faucets with 1/2″ or 3/8″ FEMALE NPT thread.

The replacement filter for the PUREPLUS Direct Connect Under Counter Water Filtration System is PUREPLUS WFC5300A Under Sink Water Filter

How to install PUREPLUS WFS5300A UnderSink Water Filter System

  1. Pure water Under Sink Water Filter

Pure water inline water filter uses granular activated carbon (GAC) and Polypropylene Depth Filtration. GAC help reduce organic chemicals (VOCs), chlorine, tastes, and odors 

Polypropylene Depth Filtration is tested and certified by NSF International against ANSI/NSF Standard 42 for Taste and Odor Reduction and Chlorine Reduction Class I.

Each end of the system has Quick-Connect Fittings which take a 3/8 Inch, Water Line.

Under Sink Water Filter Kit comes with everything you need for installation, including Inline Water Filter with 3/8” Leak Proof Quick-Connect Fittings, 5 Feet of 3/8” NSF Polyethylene Tubing, 3/8″ to 1/2″ Female Connector, 3/8″ to 9/16″ Female Adapter, 3/8″ to 9/16″ Male Adapter, Mounting Bracket with Screw, and Easy-to-Follow Installation Instructions.

It is recommended to change the filter after treating 1500 gallons/1 year. Buy replacement filter using the link below

Pure water Inline Water Filter For Under Sink Kitchen and Bathroom Faucets– 3/8″ Quick-Connect Fittings

  1. iSpring US21B Commercial Grade Under Sink Water Filter System  

iSpring US21B filter water in 2 stages including 

  • Stage 1 KDF plus GAC carbon filter removes chlorine, lead, iron, mercury, organic compounds, hydrogen sulfide, THMs, chloramines, iron, herbicides, nitrate, and many other heavy metals
  • Stage 2 CTO carbon block filter-removes heavy metal, cloudiness, chlorine taste, and odor

Change the filter every 6-12 months for best filtration performance.

It comes with two upgraded 48-inch DIRECT CONNECT hoses that connect the system to the existing under sink incoming water supply and the cold water line of your kitchen faucet

Replacement filter

Watch video on how to install iSpring US21B Heavy Duty Direct Connect 2-Stage Under Sink Water Filter System

  1. Frizzlife Under Sink Water Filter System  (MK99)

The Frizzlife MK99 Water Filtration System filter water in 2 stage that is capable of reducing Lead, Heavy Metals, Chlorine, Chromium 6, Mercury, Rust, Volatile Organic Compounds, Carcinogens, and other contaminants, such as Turbidity, Odors, and Bad Tastes.

2-stages include 

  • Sediment filter cartridge with 5-micron precision reduces particles such as sand, silt, and rust
  • 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″ Directly Connect hoses that fit standard 3/8″ feedwater valves under US kitchen sinks. It also comes with 3/8″ to 1/2″ converter fittings that allow the system to directly install to the existing both 1/2″ and 3/8″ cold water line and faucet under your sink.

This system utilizes a quick-change twist-in installation design makes it take less than 3 minutes for you to install the system or do a filter replacement. A quick twist connection makes installation easy without drilling any hole, tool-free, no plumber required, and mess-free.

The filter cap is designed to have an auto shut-off design meaning you don’t even need to shut off the water supply whenever you are replacing a cartridge

Each cartridge lasts for 2 years but for better filtration replace after 6-8 months.

Frizzlife Under Counter Drinking Water Filtration System replacement filter is Frizzlife FZ-2 Replacement Filter Cartridge

Frizzlife MK99 under sink water filter installation

  1. Hansing Full-Flow Under Sink Water Filter

Hansing Direct Connect Under Counter Drinking Water Filtration System filters water in 3-stages including 0.5-micron membrane, KDF-55, and Coconut Shell Carbon Block.

The system removes contaminants such as sediments, chlorine (99.5%), Chloramine (99%), Lead (99.9%), Chromium 6, Mercury, Bad tastes, Odors, Rust, VOCs, and other Heavy metals 

It comes with Direct Connect hoses that fit standard 3/8″ and 1/2″ water valves under US kitchen and bathroom sinks.

Replace the filter every 13,000 gallons or 3 years. Hansing Under Sink Replacement Filter Cartridge for Model HSG-01

  1. InSinkErator F-1000S, One Size

InSinkErator F-1000S includes the F1000 filter that helps remove contaminants such as particulates, chlorine taste, and odor.

It is recommended to change the filter every 6-month filter for optimal performance.

This system utilizes a quick twist-&-Lock quick-connect filter head that makes installation and filter replacement faster and easy

The water filtration system is NSF standard 42 certified

It has a 1/4-inch quick-connect fitting and features automatic water shut-off during filter cartridge replacement

This system uses InSinkErator F-1000 cartridge

InSinkErator F-2000S Water Filtration System

InSinkErator F-2000S Water Filtration System includes F2000 filter that reduces cysts, lead, mercury, asbestos, benzene, atrazine, 2,4-D, Lindane, Carbofuran, p-Dichlorobenzene, particulates, chlorine taste, and odor

The F2000 replacement cartridge is designed to last up to 6 months

  1. Watts Inline Water Filter 
inline water filter
  • 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 a 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 reduce chlorine, odor, contaminants, sediment, and particulates for better taste and healthier drinking water. 

Alkaline Under sink water filter

Alkaline Under sink water filter

Under sink water filter for limescale
Under sink water filter for limescale
  1. AQUACREST 5KDC Direct Connect Under Sink Water Filter 

AQUACREST Under Sink Direct Connect Water Filtration System employs activated carbon, KDF, and polyester membrane to remove contaminants in water.

It uses a filter made of Natural activated coconut carbon combined with the scale inhibitor and the fluoride reducer. This help reduce Chlorine, VOCs, Fluoride, Lead, and Other Heavy Metals, Intercepting Scale, Suspended Solids, Colloid, Rust, and Large Particles.

The filter has a service life of 12 months or 5,000 gallons. You will need to replace the inline water filter only once a year.

Buy replacement filter using below link

AQUA CREST GXRTDR Inline Water Filter

It helps remove contaminants such as Chlorine, VOCs, Fluoride, Lead, and Other Heavy Metals, Intercepting scales, Suspended Solids, Colloid, Rust, and Large Particles.

The package includes filter, 3/8’’ braided stainless steel inlet hose×1, 3/8’’ braided stainless steel outlet hose×1, clips and screws×1 set, cable tie mounts, and cable ties×1 set.

This system fits direct connect hoses standard 3/8” water valves under US kitchen and bathroom sinks.

The installation process is easy, the system comes with all hoses and push-to-connect fittings to install directly to the cold water line under your sink. No drilling of a hole or cutting any hoses.

It is tested against NSF standards.

How to install AQUACREST 5KDC Direct Connect Under Sink Water Filter 

More under sink water filter

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