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20 Best Under Sink Water Softener (2023 Updated)

Under sink water softeners are designed to remove hardness minerals from your water supply, providing you with softer water for your home. These softeners typically connect to your cold water line and work by exchanging sodium ions for calcium and magnesium ions in your water.

This process helps to prevent hard water build-up in your pipes and appliances and can also improve the taste and quality of your water.

20 Best Under Sink Water Softener

Product Image Product Name Features Price

iSpring RCC7 5-Stage Under Sink Reverse Osmosis Drinking Water Filtration System

  • Filters out 99 percent of more than 1000 different pollutants
  • Solid, durable construction made from the highest quality materials

iSpring RCC7P Under Sink 5-Stage Reverse Osmosis Drinking Water Filtration System

  • I Spring Maximum Performance Line
  • Unmatched Speed, Efficiency, And Drain Ratio Among Residential Ro Filtration Systems
  • Pre Equipped Booster Pump Operates Near Silent

iSpring RCC7AK 6-Stage Under Sink Reverse Osmosis Drinking Water Filter System

  • This system is certified against NSF 58 for TDS reduction and the use of FDA food-grade material in all parts
  • Clear see-through 1st stage – convenient visual inspection and monitoring of the filter condition, keeps you informed

Filtrete Maximum Under Sink Water Filtration System

  • This system reduces 99% lead, 99% microbial cysts, 97% chlorine taste and odor, plus 0.5 microns of sand, sediment, rust, and soil QUICK INSTALLATION

Frizzlife Under Sink Water Filter System-High Capacity Direct Connect

  • PP, carbon, Lead removal filter cartridge, brass water hose, brass converter fitting
  • Item Dimensions LxWxH
  • 5 x 5 x 13.5 inches

Whirlpool WHESFC Pro Series – Softener/Whole Home Filter Hybrid, Gray

  • Save Money With A 2-in-1 System: Remove hard water minerals and harmful contaminants for families of 1-to-5 with one single-tank system instead of buy.

Water Filter and Salt Free Water Softener (1-3 Bathrooms) CSF1

  • 1-3 Bathrooms

Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Filter …

  • Deionized Water Is Great For Appliances And Makes Contaminant Free Drinks And Food A Healthy Life Made Easy.
  • How Water Should Taste! Remove Up To 99.99% Of Major Contaminants Don’T Waste Money On Installing.

Waterboss 36400 Grain Water Softener

  • 36,400 Grain Cap ((170 Lbs)
  • Max Water Hardness: 90 Grains Per Gallon
  • 14-3-4Wx18-3-4Dx30-3-4H

Aquasana Whole House Salt-Free Water Conditioner

  • 6 Year Whole House

ScaleBlaster Water Softener/Conditioner/Filtration System | SB-75

  • Hard water levels up to 19 gpg or (325 ppm)
  • Economic model – indoor installations only, for homes under 4,000 sqft
  • Works on Copper, PVC, CPVC and PEX pipe

Culligan Undersink Water Filtration System

  • 0.5 / 0.5 / 500 Gal, 12 3/8 in

Brondell H2o+ Coral Three-Stage Undercounter Water Filtration System

  • Carbon Block Filtration Coral UC100 offers a powerful carbon block filter that is WQA certfied for high performance
  • Twist & Seal Filter Replacement Changing filters is a breeze with Coral’s twist & seal filter change system

Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Water …

  • Deionized Water Is Great For Appliances And Makes Contaminant Free Drinks And Food A Healthy Life Made Easy.
  • How Water Should Taste! Remove Up To 99.99% Of Major Contaminants Don’T Waste Money On Installing.

Waterboss Water Softener 22,000 Grain

  • Offers whole-house large capacity softening
  • Built-in, self-cleaning, whole-house filter
  • No cartridges to change

GE GXMH31H 31,100 Grain Water Softener & Filter in One

  • Ensures there is always plenty of softened water available by “learning” a family’s water-use patterns GE exclusive custom select blending valve
iSpring RCC7 5-Stage Under Sink Reverse Osmosis Drinking Water Filtration System
  • Filters out 99 percent of more than 1000 different pollutants
  • Solid, durable construction made from the highest quality materials
iSpring RCC7P Under Sink 5-Stage Reverse Osmosis Drinking Water Filtration System
  • I Spring Maximum Performance Line
  • Unmatched Speed, Efficiency, And Drain Ratio Among Residential Ro Filtration Systems
  • Pre Equipped Booster Pump Operates Near Silent
iSpring RCC7AK 6-Stage Under Sink Reverse Osmosis Drinking Water Filter System
  • This system is certified against NSF 58 for TDS reduction and the use of FDA food-grade material in all parts
  • Clear see-through 1st stage – convenient visual inspection and monitoring of the filter condition, keeps you informed
Filtrete Maximum Under Sink Water Filtration System
  • This system reduces 99% lead, 99% microbial cysts, 97% chlorine taste and odor, plus 0.5 microns of sand, sediment, rust, and soil QUICK INSTALLATION
Frizzlife Under Sink Water Filter System-High Capacity Direct Connect
  • PP, carbon, Lead removal filter cartridge, brass water hose, brass converter fitting
  • Item Dimensions LxWxH
  • 5 x 5 x 13.5 inches
Whirlpool WHESFC Pro Series – Softener/Whole Home Filter Hybrid, Gray
  • Save Money With A 2-in-1 System: Remove hard water minerals and harmful contaminants for families of 1-to-5 with one single-tank system instead of buy.
Water Filter and Salt Free Water Softener (1-3 Bathrooms) CSF1
  • 1-3 Bathrooms
Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Filter …
  • Deionized Water Is Great For Appliances And Makes Contaminant Free Drinks And Food A Healthy Life Made Easy.
  • How Water Should Taste! Remove Up To 99.99% Of Major Contaminants Don’T Waste Money On Installing.
Waterboss 36400 Grain Water Softener
  • 36,400 Grain Cap ((170 Lbs)
  • Max Water Hardness: 90 Grains Per Gallon
  • 14-3-4Wx18-3-4Dx30-3-4H
Aquasana Whole House Salt-Free Water Conditioner
  • 6 Year Whole House
ScaleBlaster Water Softener/Conditioner/Filtration System | SB-75
  • Hard water levels up to 19 gpg or (325 ppm)
  • Economic model – indoor installations only, for homes under 4,000 sqft
  • Works on Copper, PVC, CPVC and PEX pipe
Culligan Undersink Water Filtration System
  • 0.5 / 0.5 / 500 Gal, 12 3/8 in
Brondell H2o+ Coral Three-Stage Undercounter Water Filtration System
  • Carbon Block Filtration Coral UC100 offers a powerful carbon block filter that is WQA certfied for high performance
  • Twist & Seal Filter Replacement Changing filters is a breeze with Coral’s twist & seal filter change system
Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Water …
  • Deionized Water Is Great For Appliances And Makes Contaminant Free Drinks And Food A Healthy Life Made Easy.
  • How Water Should Taste! Remove Up To 99.99% Of Major Contaminants Don’T Waste Money On Installing.
Waterboss Water Softener 22,000 Grain
  • Offers whole-house large capacity softening
  • Built-in, self-cleaning, whole-house filter
  • No cartridges to change
GE GXMH31H 31,100 Grain Water Softener & Filter in One
  • Ensures there is always plenty of softened water available by “learning” a family’s water-use patterns GE exclusive custom select blending valve

1. iSpring RCC7 5-Stage Under Sink Reverse Osmosis Drinking Water Filtration System

iSpring RCC7 5-Stage Under Sink Reverse Osmosis Drinking Water Filtration System

  • Filters out 99 percent of more than 1000 different pollutants
  • Solid, durable construction made from the highest quality materials
  • All parts constructed using only FDA-rated food-grade materials
  • Assemble is required and the product includes all assembly hardware

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Amazon.com
eBay
Walmart
Home Depot

Product Details

Specifications

Details
Recommended Use All water types
Filtration Method Multi-method
Max Feed Water Temperature (Fahrenheit) 100
Reduces Turbidity Yes
Diameter (Inches) 2.5

Reviews From Real Customers

Jim B
Attatood
Derek

2. iSpring RCC7P Under Sink 5-Stage Reverse Osmosis Drinking Water Filtration System

iSpring RCC7P Under Sink 5-Stage Reverse Osmosis Drinking Water Filtration System

  • I Spring Maximum Performance Line
  • Unmatched Speed, Efficiency, And Drain Ratio Among Residential Ro Filtration Systems
  • Pre Equipped Booster Pump Operates Near Silent
  • Filters 1,000+ Water Pollutants Including Common Adversaries Chlorine And Fluoride
  • Thin Film Composite Semipermeable Ro Membrane Filters Down To 0.0001 Micron (A Human Hair Is Approximately 50 Microns)

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Amazon.com
eBay
Walmart – iSpring Water Systems, LLC
Home Depot

Product Details

Specifications

Details
Min Feed Water Temperature (Fahrenheit) 40
Filter Life (Months) 6
Number of Filters 5
Reduces Micro-Organisms No
Weight (lbs.) 36

Reviews From Real Customers

Bobby
Harikrishnan

3. iSpring RCC7AK 6-Stage Under Sink Reverse Osmosis Drinking Water Filter System

iSpring RCC7AK 6-Stage Under Sink Reverse Osmosis Drinking Water Filter System

  • This system is certified against NSF 58 for TDS reduction and the use of FDA food-grade material in all parts
  • Clear see-through 1st stage – convenient visual inspection and monitoring of the filter condition, keeps you informed
  • Elegant EU style designer faucet – heavy duty faucet with ceramic disk and fine brushed nickel finish

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Amazon.com
eBay
Walmart – iSpring Water Systems, LLC
Home Depot

Product Details

Specifications

Details
Width (Inches) 5.3
Household Size 4+ people
Recommended Use All water types
Height (Inches) 18
Package Quantity 1
Diameter (Inches) 2.5
Number of Filters 6
Reduces Turbidity Yes
Reduces Iron Yes
Filtration Method Multi-method
Reduces Bacteria No
Total Contaminants Reduced 1000
Total Dissolved Solids (Percentage) 95
Stage 6-stage
Reduces Pharmaceuticals No
Reduces Mercury Yes
Reduces Chloramine Yes
Max Feed Water Temperature (Fahrenheit) 100
Reduces PFOA/PFOS Yes
Weight (lbs.) 28.5
Length (Inches) 15.5
Reduces Chlorine Taste and Odor Yes
Lowe’s Exclusive No
Reduces Chemicals Yes
Reduces Lead Yes
Reduces Micro-Organisms No
Min Feed Water Temperature (Fahrenheit) 40
Filter Life (Months) 6
Reduces Sediment Yes
Reduces Cysts Yes
Flow Rate (GPM) 0.5

Reviews From Real Customers

Dave G
Frankie61

4. Filtrete Maximum Under Sink Water Filtration System

Filtrete Maximum Under Sink Water Filtration System

  • This system reduces 99% lead, 99% microbial cysts, 97% chlorine taste and odor, plus 0.5 microns of sand, sediment, rust, and soil QUICK INSTALLATION
  • This system installs in less than 30 minutes USES EXISTING FAUCET
  • Filter water right at the sink without having to install an entirely separate faucet PROVIDES HIGH FLOW RATE
  • This system maintains a high flow rate of 1.5 gallons per minute SIX MONTH FILTER LIFE
  • Use each filters for up to six months

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Amazon.com
eBay
Walmart
Home Depot

Product Details

Specifications

Details
Manufacturer Part Number 3USMAXS01
Product Model 3US-MAX-S01
Product Name Under Sink Filtration Kit
Packaged Quantity 1 Each
Product Type Water Filter

Reviews From Real Customers

Janine
ghirsh02
bc3tech

5. Frizzlife Under Sink Water Filter System-High Capacity Direct Connect

Frizzlife Under Sink Water Filter System-High Capacity Direct Connect

  • PP, carbon, Lead removal filter cartridge, brass water hose, brass converter fitting
  • Item Dimensions LxWxH
  • 5 x 5 x 13.5 inches
  • Lower Temperature Rating
  • 38 Degrees Fahrenheit

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Amazon.com – Seller
eBay
Walmart
Frizzlife

Product Details

Specifications

Details
Item traits 4.8OZ
Filtration Method Carbon/Charcoal
Item Height 10 in
Item Depth 10 in
Item Width 5 in

Reviews From Real Customers

tinydancer444
oldcrusty

6. Whirlpool WHESFC Pro Series – Softener/Whole Home Filter Hybrid, Gray

Whirlpool WHESFC Pro Series - Softener/Whole Home Filter Hybrid, Gray

  • Save Money With A 2-in-1 System: Remove hard water minerals and harmful contaminants for families of 1-to-5 with one single-tank system instead of buy.
  • Superior Hardness Removal: This hybrid water softener/filter has a 31, 000 grain capacity, an above average hardness removal rating of 120 grains per.
  • Water Contaminant Reduction: This whole home filtration system reduces sediment, chlorine taste, and odor from the water used throughout your entire h.
  • Efficiently Use Salt: The WHESFC is a smart water softener, meaning it uses demand-initiated regeneration technology to produce soft water as your hom.
  • Designed, engineered and assembled in the USA. Questions Call the Whirlpool helpline.

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Amazon.com
EcoPureHome
BrookPad

Product Details

Specifications

Details
Attribute Name Attribute Value
Product Dimensions 19 x 18 x 48 inches
Country of Origin USA
Style Filter
Item Package Quantity 1

Reviews From Real Customers

m60f
rick_de
cassandraw

7. Waterdrop Tankless 5-in-1 Under-Sink Reverse Osmosis Water Filtration System with 600 gpd Membrane, Black

Waterdrop Tankless 5-in-1 Under-Sink Reverse Osmosis Water Filtration System with 600 gpd Membrane, Black

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Amazon
Home Depot

Product Details

Specifications

Details
House Hold Size 5-6 people
Number of filters included 1
Ease of Install Drilling Required
Filtration Carbon Block
Number of Stages 5 Stage

Reviews From Real Customers

Wake
marco
Alan S

8. Water Filter and Salt Free Water Softener (1-3 Bathrooms) CSF1

Water Filter and Salt Free Water Softener (1-3 Bathrooms) CSF1

  • 1-3 Bathrooms

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Amazon
SpringWell Water Filtration Systems

Product Details

Reviews From Real Customers

Bill M.
Joel B.

9. Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Filter …

Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Filter ...

  • Deionized Water Is Great For Appliances And Makes Contaminant Free Drinks And Food A Healthy Life Made Easy.
  • How Water Should Taste! Remove Up To 99.99% Of Major Contaminants Don’T Waste Money On Installing.
  • Our Easy Quick Setup Design Means You Can Install And Understand Help Has Arrived.
  • Support From Experts Who Can Answer Any Of Your Questions About Your Home’S Water Simply Pure.
  • Removes Fluoride, Lead, Chlorine, Chromium, Calcium, Nitrates, Bacteria, Viruses, MoreMake The Purest Drinking Water With Your Own Home System.

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Amazon
eBay – expresswater
Walmart – Express Water

Product Details

Specifications

Details
Finish Deluxe Brushed Nickel

Reviews From Real Customers

Roni

10. FilterSmart Whole House Water Filter and Salt Free Softener Combo 1-4 Bath 12 GPM

FilterSmart Whole House Water Filter and Salt Free Softener Combo 1-4 Bath 12 GPM

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Amazon
FilterSmart

Product Details

Reviews From Real Customers

RC
jon b
Pons

11. Waterboss 36400 Grain Water Softener

Waterboss 36400 Grain Water Softener

  • 36,400 Grain Cap ((170 Lbs)
  • Max Water Hardness: 90 Grains Per Gallon
  • 14-3-4Wx18-3-4Dx30-3-4H
  • Reduces Iron
  • Auto Regeneration Based On Water Used

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Amazon
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Maximum Hardness Removal 90 grains/gal
Installation Kit Included Yes
Programmable Yes
Salt Storage Capacity 160 lb
Alarm No

Reviews From Real Customers

Jan

12. Aquasana Whole House Salt-Free Water Conditioner

Aquasana Whole House Salt-Free Water Conditioner

  • 6 Year Whole House

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Amazon
eBay
Walmart – Online Supply Center
Home Depot

Product Details

Specifications

Details
Dimensions 9.50 × 9.50 × 48.00 in
Application Type Water Treatment
House Hold Size 5-6 people
Includes Installation kit
Indoor/Outdoor Indoor, Outdoor

Reviews From Real Customers

Scott in Willow Glen
Former Customer
JPCi

13. ScaleBlaster Water Softener/Conditioner/Filtration System | SB-75

ScaleBlaster Water Softener/Conditioner/Filtration System | SB-75

  • Hard water levels up to 19 gpg or (325 ppm)
  • Economic model – indoor installations only, for homes under 4,000 sqft
  • Works on Copper, PVC, CPVC and PEX pipe

Check Latest Price

Sold By Price
Amazon
Lowe’s
The BuildClub

Product Details

Specifications

Details
Lowe’s Exclusive No
Works with Amazon Alexa No
App Compatibility No
Bluetooth Compatibility No
Max Clear Water Iron (Parts Per Million) 0

Reviews From Real Customers

menefeejohn
jlwspecialties
drpx

14. Culligan Undersink Water Filtration System

Culligan Undersink Water Filtration System

  • 0.5 / 0.5 / 500 Gal, 12 3/8 in

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Amazon
eBay
Walmart
McGuckin Hardware

Product Details

Specifications

Details
Manufacturer Part Number US-EZ-3
Product Model US-EZ-3
Product Name Undersink Water Filtration System
Packaged Quantity 1
Product Type Water Filter

Reviews From Real Customers

ilerus2
EricMT
Full M.

15. Brondell H2o+ Coral Three-Stage Undercounter Water Filtration System

Brondell H2o+ Coral Three-Stage Undercounter Water Filtration System

  • Carbon Block Filtration Coral UC100 offers a powerful carbon block filter that is WQA certfied for high performance
  • Twist & Seal Filter Replacement Changing filters is a breeze with Coral’s twist & seal filter change system
  • Convenient Filter Change Reminder The integrated LED indicator in the premium chrome faucet lets you know when it is time to change the filters

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Walmart
Home Depot

Product Details

Specifications

Details
Weight 6.24 lb

Reviews From Real Customers

amyhlr
BB Customer
Robin H.

16. Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Water …

Express Water Deionization Reverse Osmosis Filtration System 6 Stage RO di Water ...

  • Deionized Water Is Great For Appliances And Makes Contaminant Free Drinks And Food A Healthy Life Made Easy.
  • How Water Should Taste! Remove Up To 99.99% Of Major Contaminants Don’T Waste Money On Installing.
  • Our Easy Quick Setup Design Means You Can Install And Understand Help Has Arrived.
  • Support From Experts Who Can Answer Any Of Your Questions About Your Home’S Water Simply Pure.
  • Removes Fluoride, Lead, Chlorine, Chromium, Calcium, Nitrates, Bacteria, Viruses, MoreMake The Purest Drinking Water With Your Own Home System.

Check Latest Price

Sold By Price
Amazon
eBay – expresswater

Product Details

17. Waterboss Water Softener 22,000 Grain

Waterboss Water Softener 22,000 Grain

  • Offers whole-house large capacity softening
  • Built-in, self-cleaning, whole-house filter
  • No cartridges to change
  • Reduces clear water iron up to 10 ppm
  • Regenerates automatically

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Amazon
eBay – max_warehouse
Walmart
Ace Hardware

Product Details

Specifications

Details
Width 14.75 in.
Product Type Water Softener
Salt Storage Capacity 120 lb
Regeneration Time 18 min
Depth 18.75 in.

Reviews From Real Customers

repete

18. Waterdrop – 800GPD Tankless Reverse Osmosis Water Filter with UV Light – White

Waterdrop - 800GPD Tankless Reverse Osmosis Water Filter with UV Light - White

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Amazon
Best Buy
Home Depot

Product Details

Specifications

Details
House Hold Size 8+ people
Number of filters included 3
Ease of Install Drilling Required
Filtration Ultraviolet Light
Number of Stages 3 Stage

Reviews From Real Customers

Chaitanya H
Debra Gorney
S W

19. GE GXMH31H 31,100 Grain Water Softener & Filter in One

GE GXMH31H 31,100 Grain Water Softener & Filter in One

  • Ensures there is always plenty of softened water available by “learning” a family’s water-use patterns GE exclusive custom select blending valve
  • Allows you to select how soft you want your water GE exclusive salt saver
  • Helps reduce salt consumption Advanced filtration
  • Reduces chlorine taste and odor with built-in water filtration Grain capacity

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Sold By Price
eBay – ephesushomegoods
GE Appliances – Official Site
Warners’ Stellian
ACWholesalers.com

Product Details

Specifications

Details
Dimensions 25.60 × 15.70 × 50.00 in
Application Type Water Treatment
House Hold Size 3-4 people
Includes Installation kit
Indoor/Outdoor Indoor

Reviews From Real Customers

dragonli6688
Allesandra13
JoStorms3

20. A.O. Smith 35000-Grain Water Softener

A.O. Smith 35000-Grain Water Softener

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Lowe’s

Product Details

Specifications

Details
App Compatibility No
Works with SmartThings No
Voice Controlled No
Works with Amazon Alexa No
Works with Apple HomeKit No

Reviews From Real Customers

BillyK
Farroyol24
aosmithatlowes.com

Conclusion

In conclusion, an under sink water softener is a great way to improve the quality of your water. It is easy to install and requires little maintenance. Additionally, it will save you money on your water bill and extend the life of your appliances.

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