HE Twin Water Softener

An endless supply of fresher, cleaner soft water is within reach with this twin-tank, high efficiency (HE) whole house water softener. Enjoy the ease of 24/7 softened water, with optional salt delivery that makes system maintenance a breeze.

Ready for a water upgrade? Your local Culligan® water experts can help determine the right solution for your municipal or well water. Schedule your free, in-home water test or phone consultation to get started.


First-Class Features and Innovation

Unlimited Supply

Feel confident with dual Quadra-Hull® tanks that are built to withstand UV rays, rust and corrosion, providing 24/7 soft water for homes with high-volume water usage.

Adaptable Placement

Enjoy the ability to install your system wherever it works for you— in the laundry room, basement, garage or outside.

Flexible Softness

Change the softness of your water to fit your personal preferences with the Dial-a-Softness® control

Advanced Diagnostics

Monitor daily water use with ease and receive informative system diagnostics with the Culligan-exclusive Soft-Minder® meter.

High Efficiency Twin Water Softener Options

There are four sizes available, and all of them can be installed inside or outside. Your local Culligan water expert will provide recommendations on the best option for you based on your water flow, usage, hardness and pipe size. They may also recommend additional product options to address any other water issues or needs you may have.

Proportional Brining

Increase efficiency and reduce salt usage by allowing your softener to only regenerate the part of the resin bed that has been exhausted.


This patented technology adjusts to changes in water hardness so it only regenerates as needed, enabling more efficient operation.


100% Satisfaction Guarantee

If you are dissatisfied with your Culligan product for any reason within 30 days of your purchase, Culligan will remove the product and refund the purchase price.


Third-Party Certified

The Aquasential Smart High Efficiency 9″, 9″ Outdoor, 9″ Upflow, 9″ Upflow Outdoor, 10″, 10″ Outdoor, 10″ Upflow, 10″ Upflow Outdoor, 12″, 12″ Outdoor, 14″, and 14″ Outdoor have been tested and certified by WQA against NSF/ANSI Standard 372, CSA B483.1, and NSF/ANSI Standard 44 for the effective reduction of hardness (calcium and magnesium), barium, and radium 226/228 as verified and substantiated by test data.​
Learn more about product certifications here.

Ready To Take the Next Step?

Schedule a free, in-home consultation and water test to get one step closer to the soft water your family deserves. With options to buy, finance or rent, your local Culligan water expert will make recommendations based on your home, water usage, test results and any other concerns.

Our Environmental Impact


Efficient Systems

Culligan high efficiency water softeners are engineered to use less salt and water than standard softeners.


Earth-Conscious Innovation

We prioritize sustainability in designing and developing new products.


Global Water Leadership

Culligan has joined the CEO Water Mandate and the Water Resilience Coalition to lead the way in positive, global water stewardship.


Culligan products are reliable and long-lasting, with industry-leading warranties.

  • Quadra-Hull® conditioner tank and Cullex® resin: Lifetime
  • High Efficiency GBE circuit board, control valve body (excluding internal parts), salt storage container, brine valve and all its component parts: 10 years
  • Soft-Minder® meter, Aqua-Sensor® probe, if so equipped: Five years
  • Entire conditioner: One year

To access customer support, call your local Culligan water expert or​ fill out this Maintenance & Support form​.






A – Total Height





B – Resin Tank Height





C – Resin Tank Width





D – Brine Tank Width/ Weight





E – Brine Tank Height





Product Details

Total Hardness Maximum

Resin Volume in Cubic Feet

Rated Service Flow in Gallons per Minute

Efficiency at Rated Dosage²

9” Downflow

75 gpg

Cullex® Media, 1.0 ft³

9.0 gpm @ 15 psi

4,463 gr/lb @ 4 lb salt dosage

10” Downflow

99 gpg

Cullex® Media, 1.5 ft³

9.4 gpm @ 12 psi

4,463 gr/lb @ 6 lb salt dosage

12” Downflow

99 gpg

Cullex® Media, 2.0 ft³

10.0 gpm @ 11 psi

4,479 gr/lb @ 7 lb salt dosage

14” Downflow

99 gpg

Cullex® Media, 3.0 ft³

10.0 gpm @ 10 psi

4,052 gr/lb @ 10.5 lb salt dosage

9” Upflow

30 gpg

Cullex® Media, 1.0 ft³

9.0 gpm @ 15 psi

4,896 gr/lb @ 2 lb salt dosage

10” Upflow

30 gpg

Cullex® Media, 1.5 ft³

9.1 gpm @ 15 psi

5,105 gr/lb @ 3 lb salt dosage

Our unmatched, white-glove service doesn’t stop at your free water test and consultation. Your local Culligan water experts will be there to help for the entire life of your whole house soft water system with installation and maintenance, assisting with needs such as salt refills, system sanitation and more.

Convenient Service Plans

Sign up for our regular salt delivery and maintenance plans so you never have to worry about your system’s performance.


85+ Years of Experience

With over 85 years of water treatment experience, you can count on us to provide the solutions and service you need anytime.


Unwavering Local Support

Our team of experts knows your local water and is there to offer support and services right in your neighborhood.


Flexible Installation Areas

Your system can be installed anywhere you have access to main water piping, a drain and an electrical outlet — in the laundry room, basement, garage, or outside.

Play Video

Water Softener Installation: What to Expect

Learn everything you need to know about getting started with your smart water softener.

Can I use a whole house water softener for well water?
Yes. You can use this water softener for well water; however it is recommended to schedule a free water consultation to find out more about your water and if your home may benefit from filtration as well as softening.
No. Whole house systems aren’t different from traditional water softeners. Most traditional water softeners, including all Culligan brand softeners, are whole house systems. They treat your water from the point where it enters your home, providing soft water from every tap. There are some types of specialty softeners that would work differently, treating water at the point of use.
A twin tank water softener has the benefit of 24/7 water softening capabilities. When one tank needs to regenerate, it automatically switches to the other one, providing a constant stream of softened water. Culligan high efficiency systems only regenerate as needed, which saves money, water and salt.
Does the Culligan HE Twin Softener system require more space than a single tank softener?

Because of its unique dual-tank design, this system does require more space (see sizing chart above for more detail). This makes it ideal for homes with higher water usage. To find the type and size of softener that’s best for your needs, start with a free, in-home water test and consultation.

Yes. The dual design allows one tank to continue softening even while the other undergoes maintenance or regeneration. That means you’ll have a reliable, uninterrupted supply of soft water whenever you need it.

The advantage of a twin tank water softener is that when one tank needs to regenerate, it automatically switches to the other one, providing an endless supply of softened water. Larger households may sometimes use more water than a single tank can provide, requiring regeneration during use. This process can take 80-90 minutes and softened water will not be available until completed.

I have a large family that is always on the go, so Culligan is perfect for us.

I like that I don’t have to think about or have another thing to remember.

— Bre F, MN

Their equipment is very reliable along with professional, friendly service.

The amount that I save on salt is quite amazing.

Let’s Get Started

Start enjoying the benefits of soft water in your home with help from your local Culligan water experts.