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Kenmore

Kenmore 420 Water Softener System – 40,000 Grain Capacity with Salt Saving Technology – Whole Home Hard Water & Iron Reduction – Compact, Easy Install

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jun 6
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Color: Gray


Size: Softener / 40,000 Grain


Features

  • Perfect for Larger Families: Designed for households of 15 people with tough water challenges. The Kenmore 420 softens hardness and reduces clear water iron, protecting your home from mineral buildup and stains
  • Whole-Home Protection: Reduces hard minerals like calcium, magnesium, and iron to stop scale, rust, and soap scum. Enjoy softer hair and skin, brighter laundry, spotless dishes, and plumbing and appliances that last longer
  • IntelliSoft Technology: The IntelliSoft system uses artificial intelligence to learn your familys unique water use patterns and regenerate only when needed. This smart, efficient system can use less salt and helps to cut waste and ensure efficient household energy
  • Ideal for Well Water: Designed with a powerful sediment pre-filter and enhanced iron reduction capabilities, this system effectively tackles the unique challenges of well waterhelping reduce rust, dirt, and other impurities for cleaner, better-tasting water throughout your home
  • Trusted Kenmore Quality with Warranty: Built-in sediment screen adds extra protection for appliances and pipes. Comes with a 1-year full warranty (plus 3 years on electronics, 10 years on the tank)

Description

The Kenmore 420 Water Softener delivers superior hard water protection in a compact, space-saving design. With a 40,000-grain capacity, it reduces hardness minerals up to 120 gpg and clear water iron up to 10 ppm—helping eliminate scale, stains, and the effects of mineral-heavy water on your home and family. IntelliSoft Technology adapts to your water use, regenerating only when needed to save salt, water, and energy while keeping soft water available around the clock. Engineered for whole-home coverage, the Kenmore 420 features a ¾″ Ultra Flow Valve that keeps water pressure strong throughout the house. An intuitive digital display lets you monitor flow rate, salt levels, and daily usage in real time. The built-in sediment shield adds an extra layer of protection for plumbing and appliances. Backed by Kenmore’s trusted warranty, with up to 5 years of full coverage available, the Kenmore 420 is a reliable, efficient solution for families who want healthier skin, cleaner laundry, longer-lasting appliances, and better water quality every day.

Brand: Kenmore


Special Feature: NSF certified, Programmable


Product Dimensions: 20.5"L x 15"W x 48"H


Material: Acrylonitrile Butadiene Styrene


Capacity: 1.11 Cubic Feet


Included Components: Kenmore Water Softener, Bypass Valve, Installation Kit


Package Information: Bottle


Installation Type: Freestanding


Purification Method: Ion Exchange


Power Source: No Power Source Required


Other Special Features of the Product: NSF certified, Programmable


Container Type: Bottle


Installation Type: Freestanding


Purification Method: Ion Exchange


Power Source: No Power Source Required


LowerTemperature Range: 40 Degrees Fahrenheit


Maximum Flow Rate: 7.7 Gallons Per Minute


Operating Pressure Range: 20 - 125 PSI


Upper Temperature Rating: 120 Degrees Fahrenheit


Supported Water TDS Level Maximum (PPM): 10


Smart Home Compatibility: Not Smart Home Compatible


Item Dimensions L x W x H: 20.5"L x 15"W x 48"H


Capacity: 1.11 Cubic Feet


Item Weight: 102 Pounds


Brand Name: Kenmore


Included Components: Kenmore Water Softener, Bypass Valve, Installation Kit


Model Name: 420


Model Number: 420


UPC: 633815604370


Manufacturer: Water Channel Partners


Manufacture Year: 2024


Part Number: 625.3842


Item Type Name: Water Softener With Ultra Flow Valve | Reduce Hardness Minerals & Clear Water Iron | Whole Home Water Softener | Easy To Install | Reduce Hard Water In Your Home


Unit Count: 1.0 Count


Material Type: Acrylonitrile Butadiene Styrene


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • My First Water Softener
Color: Gray Size: Softener / 40,000 Grain
Review Image by N Garner
Review Image by N Garner
Initial opinion of the water softener is 5 stars. Will update if this changes later. The product arrived in good condition and was very pleased with the deluxe delivery with the crew taking away the boxes and plastic after taking it into my basement. Setup was intuitive and easy if you have a basic understanding of plumbing. I'm not a plumber and it took 60-ish minutes to redo my three filter and UV setup to route into and out of the unit. I followed a video that was part of the QR code that doubled as your set of instructions for water and salt adding and the initial regeneration cycle. That regen cycle took 90 minutes and have me time to clean up. Unit is silent when in use. I guess that's normal. My first water softener so I don't really know. The regen cycle is louder, but it's not overpowering. The water has been softened by a large margin. I feel that slippery feel of soft water when showering or washing hands. Was not like that previously. Again, my first one do I think it's working right. Make sure you can drain the system properly based upon local codes. I had to install a P trap to existing plumbing (with air gap) to send water out to septic during regeneration. This is more advanced in terms of plumbing but it worked out very well in the end. The drain hose was about half the length needed so I had to buy more. Not a deal breaker, but annoying. What I liked: Looks good. Works well. Easy as can be installation for DIYers. Easy setup and use of control panel. No salty taste from fridge water. What I didn't care for: Needing QR code instead of a booklet for instructions. Very short drain line. Video showing installing the unit may not be your unit that was purchased. ... show more
Reviewed in the United States on March 2, 2026 by N Garner
    • Amazing!
Color: Gray Size: Softener / 40,000 Grain
We have hard well water and our water has never been so soft!!
Reviewed in the United States on April 28, 2026 by Brandi A.
    • Do not recommend
Color: Gray Size: Softener / 40,000 Grain
Just had a professional install and it’s a dud!!! Power to the unit is fine but clearly a bad circuit board!!! My mistake thinking it would be an easy flip. The unit I was replacing was 25 years old which is why I chose to go with another Kenmore. Was hopeful that this would be an easy replacement but that would be too much to ask! Now I am left with mutable bills with a repair….would not recommend! ... show more
Reviewed in the United States on April 20, 2026 by Betty J. Kent
    • TOP OF THE WATER SOFTENER
Color: Gray Size: Softener / 40,000 Grain
JUST INSTALLED WATER SOFTENER WORKS GREAT AND LIKE THE COMPACT FIT OF THE UNIT.
Reviewed in the United States on May 15, 2025 by GENE BLACK
    • Kenmore 420 is better than Kenmore Elite Water Softener
Color: Gray Size: Softener / 40,000 Grain
We had a Kenmore Elite Water Softener for about 15 years (from 2010 to 2025) and it worked great, but finally decided to upgrade to the Kenmore 420P (we don't know that the "P" stands for) in November 2025. So, after installation, which was very easy (although not all the fittings for the Kenmore 420P matched the Kenmore Elite), our water was down from about 35 GPG to 5 GPG in a matter of just a few hours. What we really like about this "upgrade" to the Kenmore 420P is that water pressure is much better and more consistent than it was with the Kenmore Elite. The Kenmore 420P is a bit more expensive (about $850) but well worth the investment. Yay! ... show more
Reviewed in the United States on November 29, 2025 by Dr. Jim
    • Nice soft water now.
Color: Gray Size: Softener / 40,000 Grain
Working perfectly easy to install.
Reviewed in the United States on March 18, 2026 by Jerry Shaver
    • works like a champ
Color: Gray Size: Softener / 40,000 Grain
bought one in 2012 which it need to be replace .ease to hook up .the quality was good and it lasted 13 years.
Reviewed in the United States on October 13, 2025 by mark
    • Don't buy if you expect decent warranty support
Color: Gray Size: Softener / 40,000 Grain
I purchased the 420 model to replace an identical 7 year old Kenmore softener that quit working. The new model cost almost double what I paid for the old one at Sears. The new one started leaking at the top of the resin tank immediately after I turned on the water after installation. After a week of phone calls and e-mails to Kenmore customer support (there is no longer a number to call for warranty repairs/support) the leak still exists and I have not received any useful assistance. Kenmore customer support keeps sending me information to help to dismantle the unit so I can tell them exactly what the problem is. If the problem is something like bad seals or improperly installed seals, they will send me new ones. However, they expect me to replace them. I am not a plumber and this is not appropriate warranty support. If I take the unit apart and mess something up, the warranty won't cover the damage. Since Sears is no longer in business (I never had a problem getting warranty support from Sears), Kenmore is no longer providing the same level of support that Sears provided. If you expect any adequate level of support, definitely do not buy a Kenmore product. They say they have a warranty, but won't send anyone to do the warranty work. Update: Today I received an e-mail stating that they have ordered the needed parts (not described) and gave me the name and number of a service company that will install the parts, which should arrive in one to two weeks. ... show more
Reviewed in the United States on April 22, 2023 by garyms

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