Aquasential® Smart High Efficiency Nitrate Reduction Conditioner

Upgrade your water with the only WQA-certified whole house nitrate water filter available today.1 Address potentially harmful nitrate levels and feel confident your water is safer and cleaner.2 With advanced smart features, you and your local Culligan® expert can also get notified remotely for any service needs.

Ready for a whole home water upgrade? Nitrate can’t be detected through tastes or smells, but your local Culligan water experts can help diagnose your water problems and find the right solutions for your municipal or well water. Schedule your free, in-home water test or phone consultation to get started.

Redefine Water Safety with Smart Technology

Dependable Water in Every Drop


On-the-Go Management

Monitor your system from anywhere with the easy-to-use Culligan Connect App.


Worry-Free Maintenance

Enjoy the convenience of remote troubleshooting and get automatic alerts to both you and your local service team when your system needs maintenance.


Convenient Conservation

Track your home’s water usage and set conservation goals.


Customized Usage

With remote bypass capability right from the app, choose when and where you need filtered water.

Take Your Water to the Next Level

Targeted Filtration

Culligan nitrate-selective resin is specifically designed to prevent the release of high levels of nitrate into your home’s water.

Flexible Installation

Both indoor and outdoor models are available, so you can have your whole house nitrate filter installed wherever is most convenient for you.

State-of-The-Art Monitoring

The Culligan-exclusive Soft-Minder® Meter monitors your daily water use and provides advanced system diagnostics.

Powerful Design

The high-impact Quadra-Hull® Tank has a four-layer design that resists UV rays, rust and corrosion.

Whole House Nitrate Filter Options

In addition to the system’s high-tech features, there are bonus options available to upgrade your water filter for nitrates.

Salt Level Monitor

Effortlessly maintain your system with a monitor that automatically tells you how many days of salt are remaining in your tank.

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.

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 Culligan Aquasential Smart High Efficiency Nitrate Reduction Water Conditioners have been tested and certified by WQA against NSF/ANSI/CAN Standard 372, NSF/ANSI Standard 42 for material safety and structural integrity, and CSA B483.1. The system is tested and certified by WQA to WQA ORD 2301 for Nitrate reduction as verified and substantiated by test data.

Ready To Take the Next Step?

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

Our Environmental Impact


40 Billion+ Bottles Saved

Culligan water filtration solutions benefit the environment by reducing single-use plastic bottle waste and saving billions of bottles each year.


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: Lifetime
  • The Aquasential Smart High Efficiency GBX circuit board, control valve body, excluding internal parts and the Fiberglass Conditioner Tank, if so equipped: Ten years
  • Soft-Minder meter: Five-year warranty
  • Entire system: One-year warranty

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

18” with 375 LB Brine Tank

18” with 375 LB Brine Tank

18” with 375 LB Brine Tank

E – Brine Tank Height




Product Details

Total Hardness Maximum

Resin Volume in Cubic Feet

Rated Service Flow in Gallons per Minute

Rated Capacity³


9 gpg

Nitrate Selective Resin, 1.0 ft³

9.0 gpm @ 3.0 psi

9,500 grains @ 8 lbs. salt


9 gpg

Nitrate Selective Resin, 2.0 ft³

8 gpm @ 8.0 psi

19,400 grains @ 16 lbs. salt


9 gpg

Nitrate Selective Resin, 3.0 ft³

12.1 gpm @ 14.0 psi

29,100 grains @ 24 lbs. salt

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. They can even monitor your system proactively for issues, offering you further peace of mind.


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.

How does nitrate get into my water supply?

Nitrate in groundwater originates from nitrogen, a naturally present plant nutrient, and from inorganic fertilizers and animal manure. As water from rain and irrigation flows through soil into the groundwater, it can potentially pick up nitrate along the way.

Nitrate in groundwater is more likely to be a problem in areas where farming and agriculture are common. Nitrate contamination can also be present in densely populated areas due to heavy use of lawn fertilizers and failing septic systems. Nitrate contamination is typically in very low concentrations, but some areas have levels of nitrate that can create health problems.

Yes. This nitrate water filter is ideal for well water. In fact, it is the only WQA-certified whole house nitrate reduction system available today.

If you are dealing with more than one well water problem, you may require multiple solutions, such as a reverse osmosis system or a water softener. With a free, in-home water consultation, your local Culligan water expert can help determine what systems your home may need.

This system should not affect taste or smell. If you have issues with unpleasant odors or tastes, other Culligan filters can help. It is recommended to schedule a free water consultation to find out more about your water problems and determine the right solution.

Any kind of system that improves the quality of your water through some type of water treatment – be it softening, filtration or both – can be considered a home water conditioner. Having a whole house water conditioner like the Smart HE nitrate water filter can address nitrate in your water.

Culligan provides a free, in-home water consultation where your local Culligan expert can help you get started with water testing. They will be there to help you from your consultation to installation and beyond to ensure your system is working properly so you can have cleaner, safer water.

What are some signs of high nitrate levels in my water?

Nitrate has no taste, smell or visual signs, so it is recommended to get your water tested if you have reason to be concerned that you may have this issue with your water.

The nitrate conditioner tank is filled with an anion resin, which is positively charged. Because the nitrate ions are negatively charged, the resin attracts them and pulls them out of your water. There is a second tank containing a brine solution, which regularly rinses the resin to keep it working effectively.

This system is certified for nitrate reduction specifically, but other Culligan filters can help address issues such as unpleasant tastes and smells, stains on dishes and fixtures or clogged appliances. Schedule a free water consultation with a local Culligan water expert to find out more about your water problems and see if your home may benefit from multiple systems.

A properly sized system should not significantly impact your water flow or pressure.

I would highly recommend the water system that we had installed …

especially out on the eastern plains as it is needed due to the nitrates in the soil.

— Chris W, CO

Our town has a high nitrate count & we don’t have to worry about that with the unit …

It sure is nice to have clean drinking water.

— Larry & Alyce W, NE

The process was easy, fast and efficient

from the initial conversation to the finished install.

— Kody M, SK

Let’s Get Started

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