Aquasential® Smart High Efficiency Twin Water Softener

Get an uninterrupted supply of soft water at every tap. From cost savings and a cleaner home to healthier-feeling skin and hair, you’ll enjoy all the benefits with this home water softener system. Plus, with advanced smart features and hassle-free maintenance, softening is always convenient and customizable.

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.


Always-on Softening with Smart Control

Customizable and Wi-Fi Connected


24/7 Performance

Never run out of salt with refill alerts via the Culligan Connect App. That means you can enjoy optimally soft water whenever and wherever you need it.


Easy Troubleshooting

Get maintenance alerts through the app as well. Your hard water softener system can even enable remote troubleshooting from your Culligan service team.


Smart Savings

Cut down your water bill with usage and conservation goals right on your phone. Plus, with Wi-Fi-connected features, quick updates are just a tap away.


Remote Control

Tell your home water softener system exactly what you want, from one-tap bypass of your system to save soft water to Away Mode when traveling.

The Power of a Twin Tank Water Softener

Uninterrupted Softening

Dual tanks provide a continuous supply of soft water 24 hours a day, even during regeneration.

Customized Softness

Culligan’s Dial-a-Softness® control puts you in charge of how your water feels.

Unmatched Reliability

Dual Quadra-Hull® tanks make this hard water softener system extra durable, built to withstand UV rays, rust and corrosion.

Flexible Fit

Choose from a variety of water softener system sizes built to fit in the laundry room, basement, garage and more.

Home Water Softener System Options

Choose from four softener sizes and indoor or outdoor installation. Your local Culligan water expert will provide recommendations 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.

Salt Level Monitor

Effortlessly maintain your system with a monitor that tells you how many days of salt are remaining in your tank, with notifications available through the Culligan Connect App

Leak Sensor

Experience comfort and peace of mind with an external leak sensor that can detect leaks around your tank as well as nearby water-using appliances. If detected, you’ll receive alert notifications right through our app.


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
  • Aquasential Smart High Efficiency circuit board, control valve body (excluding internal parts), salt storage container, brine valve and all its component parts: 10 years
  • Soft-Minder meter, Smart Brine probe, Salt Level Monitor and Aqua-Sensor probe: 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





C – Resin Tank





D – Brine Tank
Width/ Weight

18” 375 LB

18” 375 LB

18” 375 LB

24” 600 LB

E – Brine Tank












Total Hardness Maximum

75 gpg

99 gpg

99 gpg

99 gpg

30 gpg

30 gpg

Resin Volume in Cubic Feet

Cullex® 8% Resin, 1.0 ft3 or Cullex® 10% Resin, 1.0 ft³

Cullex® 8% Resin, 1.5 ft³

Cullex® 8% Resin, 2.0 ft³

Cullex® 8% Resin, 3.0 ft³

Cullex® Media, 1.0 ft³

Culex Media, 1.5 ft³

Peak Service Flow

10.9 gpm @ 15 psi 41.3 Lpm @ 103.4 kPa

11.0 gpm @ 15 psi 41.6 Lpm @ 103.4 kPa

12.6 gpm @ 15 psi 47.7 Lpm @ 103.4 kPa

12.8 gpm @ 15 psi 48.5 Lpm @ 103.4 kPa

Efficiency at Rated Dosage²

4,751 grains/lb @ 4 lb salt dosage

5,073 grains/lb @ 6 lb salt dosage

4,052 grains/lb @ 7 lb salt dosage

4,052 grains/lb @ 10.5 lb salt dosage

5,105 grains/lb @ 2 lb salt dosage

5,105 grains/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 water softener 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.

Does this water softener work for both well and city water?
The Culligan Connect App makes it easy to get information and alerts as well as make updates to your home water softener system. Smart features include: Getting salt refill and maintenance alerts Water conservation tracking and goals Bypassing your softener from the app Setting your softener to away mode Enabling your local Culligan service team to get notified if your system has an issue and troubleshoot remotely
Does the Aquasential Smart HE Twin Softener system require more space than a single tank softener?
Because of its unique dual-tank design, this hard water softener 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.

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.

Some Culligan water softener systems have advanced features that enable you to control and monitor regeneration. Depending on your model, you may be able to schedule regeneration, manually begin the process or receive real-time alerts.

I appreciate the soft water — and it’s very convenient.

The equipment is running on its own and seems like a durable, smart, self-activating machine.

Culligan service is fantastic.

Everyone from the office to the delivery is friendly and professional.

Prompt service and accommodating delivery people.

Thanks for making our lives a little easier!

Let’s Get Started

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