Top 7 Water Softeners for Tankless Water Heaters: Discover the Best Solutions for Perfectly Softened Water

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Welcome to my post on the top 7 water softeners for tankless water heaters! If you're looking for the best solutions to enjoy perfectly softened water, you've come to the right place. In this roundup, we'll be discussing some fantastic products that can help remove hardness minerals from your water, ensuring a more enjoyable and efficient experience with your tankless water heater. From the AQUACREST AP431 Whole House Scale Inhibitor to the Applied Membranes Anti-Scale System, we'll explore a range of options that are sure to meet your needs. So, let's dive in and discover the perfect water softener for your tankless water heater!

1

Whirlpool WHES30E Softener | Salt & Water Saving | NSF Certified

 in stock
Amazon.com
8.9
Overall
The Whirlpool WHES30E 30,000 Grain Softener is an efficient and convenient solution for whole house water softening. With its salt and water saving technology and NSF certification, it ensures quality and safety. However, potential drawbacks include the possibility of a faulty control board and the risk of flooding in case of a malfunction.
Benefits of Whirlpool WHES30E
  • Efficient water softening capabilities
  • Salt and water saving technology
  • NSF certified for quality and safety standards compliance
  • Automatic whole house soft water regeneration for convenience
Limitations
  • Based on the reviews
  • one drawback of the Whirlpool WHES30E 30
  • 000 Grain Softener could be the possibility of a faulty control board. Another drawback could be the potential for flooding if there is a malfunction

The Whirlpool WHES30E 30,000 Grain Softener is the perfect solution for families of 1-4+ people who want to enjoy the benefits of soft water. Not only does it eliminate embarrassing mineral stains and keep your clothes and fabrics cleaner and softer, but it also helps your appliances last longer by running more efficiently. The demand initiated regeneration feature ensures that you only regenerate based on your hardness level and water usage, resulting in significant salt and water savings. With simple programming and a low salt indicator light, this softener is easy to use and maintain. Plus, it's NSF certified to reduce hard water symptoms, making it a reliable choice.

Efficient and Certified
  • 30,000 grain capacity
  • Salt and water saving technology
  • NSF certified
  • Automatic whole house soft water regeneration
  • 0.75 inches size
  • Off-white color
2

Aquasure Harmony Water Softener

 in stock
Amazon.com
8.9
Top choice
The Aquasure Harmony Series 48,000 Grains Whole House Water Softener is a great option for households with 3-4 bathrooms. It delivers ultra-softened water, noticeably reducing mineral buildup and leaving a silky feel on the skin. While the digital controls may be a bit complicated, the low-maintenance operation and option for professional installation make it a reliable choice for improving water quality throughout your home.
Benefits of Aquasure Harmony
  • Noticeably softer water
  • Reduced mineral buildup
  • Silkier feel on the skin
  • Low-maintenance operation
  • Professional installation available
Drawbacks
  • Complicated digital controls
  • May require additional tools and parts for installation

The Aquasure Harmony Series 48,000 Grains Whole House Water Softener is the perfect solution for households with 3-4 bathrooms. Designed to deliver ultra-softened water to every outlet in your home, this professional-grade water softener ensures that your appliances are protected by reducing water hardness and eliminating scale buildup. The results are truly remarkable, as customers have experienced noticeably softer water and an improved daily routine. The installation process is smooth and efficient, and the system operates quietly and efficiently, providing soft water without requiring constant attention. Choose Aquasure for a top-notch water softening experience with the convenience of professional installation.

Advanced Water Conditioning Technology
3

Waterdrop Scale Inhibitor Filter

$59.98  in stock
Amazon.com
as of April 18, 2024 12:17 pm
8.9
Verdict: Highly recommended!
The Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter is an efficient and reliable system that effectively prevents scale build up on hot water heaters, pipes, and boilers. It uses food-grade polyphosphates and promotes energy conservation. However, there is a possibility of filter breakage if over tightened and Teflon tape may not be effective with stainless steel.
Benefits of Waterdrop Scale Inhibitor
  • Efficient scale inhibition
  • Food-grade polyphosphates
  • Energy conservation
Limitations
  • Possibility of filter breakage if over tightened
  • Teflon tape may not be effective with stainless steel

The Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter is a reliable and efficient solution for preventing scale build-up on hot water heaters, pipes, and boilers. With its food-grade polyphosphates, this scale inhibitor fundamentally inhibits scale formation, ensuring that you have healthy and clean water. Unlike conventional filters, this product is designed to provide energy conservation, saving you money on your energy bills. The reviews speak for themselves, with customers praising the unit for its ability to remove calcium and prevent build-up on appliances that use hot water. Overall, this scale inhibitor is a great option for maintaining the quality and longevity of your water system.

Say Goodbye to Scale!
  • Efficient scale inhibition
  • Food-grade polyphosphates
  • Energy conservation
  • Prevents scale build up on hot water heaters, pipes, and boilers
$59.98
in stock
as of April 18, 2024 12:17 pm
Amazon.com
4

AQUACREST AP431 Whole House Scale Inhibitor

$39.99
Amazon.com
as of April 18, 2024 12:17 pm
8.7
Effective scale inhibitor
The AQUACREST AP431 AP430SS Whole House Scale Inhibitor is an easy-to-install and efficient solution for preventing scale build-up in your water system. While it effectively descales and purifies the whole house water supply, some customers have reported that it may not be as effective on hot water heaters, water pipes, and boilers.
Effective Scale Prevention
  • Easy installation
  • Descales and purifies whole house water supply
  • Efficient scale inhibition
Limitations
  • Some reviewers have reported that the product may not effectively prevent scale build-up on hot water heaters
  • A few customers have mentioned that the system may not work as effectively on water pipes and boilers

The AQUACREST AP431 AP430SS Whole House Scale Inhibitor Inline Water System is an efficient solution for preventing scale buildup in your water system. With its food-grade polyphosphate, this scale inhibitor effectively inhibits limescale formation by preventing calcium and magnesium ions from precipitating and combining. It also helps reduce corrosion by forming a protective layer on the inner surfaces of shower heads, water heaters, and other water pipes. Customers have found this product very easy to install and have praised its ability to descale and purify their whole house water supply.

Prevent Scale Buildup Efficiently
  • Efficient scale inhibition
  • Food-grade polyphosphate
  • Prevents limescale formation
  • Reduces corrosion
  • Forms a protective layer on inner surfaces
  • Suitable for water heaters, shower heads, and water pipes
5

Whirlpool WHES40E Softener | Salt & Water Saving | NSF Certified | Whole House Regeneration

$789.00
Amazon.com
as of April 18, 2024 12:17 pm
8.4
Effective and Convenient
The Whirlpool WHES40E 40,000 Grain Softener offers a convenient solution for households of 1-6 plus people with its easy installation, large salt capacity, and adjustable hardness level. Although some users have reported damaged packaging and the need for frequent salt refills, it still provides effective water softening with salt and water saving technology.
Efficient Water Softener
  • Easy to install
  • Holds a large amount of salt
  • Adjustable hardness level
Drawbacks
  • Packaging was damaged during delivery
  • Holds a significant amount of salt, which may require frequent refilling

The Whirlpool WHES40E 40,000 Grain Softener is a reliable and efficient way to soften your water. It eliminates mineral stains, leaves fabrics cleaner and softer, and helps your appliances run more efficiently. With demand initiated regeneration, it saves salt and water by only regenerating when necessary. It also comes with simple-to-program electronics and a low salt indicator light. The high flow valve maintains great water pressure and it is NSF certified to reduce hard water symptoms. This water softener is ideal for households of 1-6+ people and removes up to 10 ppm of clear water iron.

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Efficient Water Softening Solution
  • 40,000 grain capacity
  • Salt and water saving technology
  • NSF certified
  • Automatic whole house soft water regeneration
  • Ideal for households of 1-6 plus people
  • Removes up to 10 ppm of clear water iron
6

Whirlpool WHESFC Hybrid Softener/Filter

$339.99
$13.99
 in stock
Amazon.com
as of April 18, 2024 12:17 pm
8.2
Top Choice
The Whirlpool WHESFC Pro Series is an excellent 2-in-1 system that combines water softening and whole home filtration. It effectively removes hard water minerals and filters out harmful contaminants, providing clean and safe water for your family. The system is ideal for small to medium-sized households and comes with clear instructions for easy installation. Despite a few initial product condition issues, the overall performance and value of this product make it a great choice.
Efficient and Versatile
  • Effective water softening
  • Holds a large amount of salt
  • Relatively affordable compared to other systems
  • Easy installation process
  • Clear instructions and information on the manufacturer's website
  • Significant improvement in water hardness
  • Comes with an extended warranty option
Disadvantages
  • Drawbacks:
  • Initial product condition upon delivery was not satisfactory (scraped case, warped bottom, loose circuit board)
  • Seal between brine tank and valve body was leaking, requiring additional maintenance

The Whirlpool WHESFC Pro Series is a 2-in-1 water softener and whole house filtration system that provides better water for you and your home. It uses demand-initiated regeneration technology, which helps reduce unnecessary salt use and minimizes the need for replacement water softener salt. The 6th sense technology ensures more efficient salt and water use, reducing waste. This system is NSF certified, meaning it complies with strict standards to ensure the safety of your water. With easy installation and high-flow valve maintenance, this system is designed to provide superior hardness removal and remove harmful contaminants, sediment, and chlorine from your water.

Advanced Water Treatment Solution
  • 2-in-1 system: Saves money by combining two systems into one
  • Removes hard water minerals: Provides superior hardness removal
  • Filters out harmful contaminants: Ensures clean and safe water for your family
  • Ideal for families of 1-to-5: Designed to meet the needs of small to medium-sized households
  • Rated Service Flow Rate: 8.0 gpm
  • Maximum Drain Flow Rate: 2 gpm
$13.99
$339.99
in stock
as of April 18, 2024 12:17 pm
Amazon.com
7

Applied Membranes Anti-Scale System | Whole-House Scale Protection

 in stock
Amazon.com
8.1
In summary, a reliable and eco-friendly choice
The APPLIED MEMBRANES INC. Anti-Scale System is a reliable and eco-friendly solution for extending the lifespan of tankless water heater systems and protecting home appliances. With no need for salt or harmful chemicals, it is a great choice for environmentally conscious consumers. However, the limited filter lifespan and the potential need for professional assistance during installation and setup should be taken into consideration.
Effective Scale Prevention
  • Prolongs the lifespan of tankless water heater systems
  • Safeguards home appliances
  • Environmentally conscious solution
  • No need for salt or harmful chemicals
Drawbacks
  • Limited filter lifespan
  • Initial installation and setup may require professional assistance

Protect your home plumbing system and extend the life of your tankless water heater with the APPLIED MEMBRANES INC. Anti-Scale System. This low-maintenance, environmentally friendly filter is a great alternative to water softeners, as it prevents scale without the need for salt or harmful chemicals. Easy to install and highly effective, it's a must-have for any water system.

Effective Scale Prevention Solution
  • Extend the life of tankless water heater systems
  • Protect home appliances
  • Environmentally friendly
  • No salt or harmful chemicals

Do I have to install a water softener for my tankless water heater?

Choosing the Perfect Water Softener for Your Tankless Water Heater

How often do I need to regenerate or maintain a water softener used with a tankless water heater?

To keep your water softener working efficiently with a tankless water heater, regular regeneration and maintenance are necessary. The frequency of regeneration depends on various factors, such as the hardness of your water and the size of your water softener.

As a general guideline, most water softeners require regeneration every 7 to 10 days. However, it's important to consult the manufacturer's instructions for your specific model to determine the recommended regeneration schedule. Some high-efficiency water softeners may have longer regeneration cycles, while others might require more frequent regeneration.

In addition to regeneration, routine maintenance is crucial for optimal performance. This includes checking and cleaning the brine tank, inspecting the resin bed, and ensuring the system is free from any blockages or leaks. Regular maintenance will help prolong the lifespan of your water softener and ensure it continues to provide you with softened water for your tankless water heater.

If you're unsure about the specific regeneration and maintenance requirements for your water softener, I recommend reaching out to the manufacturer or consulting a professional plumber who specializes in water treatment systems. They will be able to provide you with the most accurate and personalized guidance based on your unique setup.

Can I install a water softener myself or should I hire a professional for the installation?

Installing a water softener can be a fairly straightforward process, but it does require some basic plumbing knowledge and skills. If you have experience with plumbing and feel confident in your abilities, you may be able to install a water softener yourself. However, if you are unsure or uncomfortable with plumbing tasks, it is always best to hire a professional for the installation.

A professional installer will have the necessary expertise to ensure that the water softener is installed correctly and that all the necessary connections and settings are properly configured. They will also be able to handle any unforeseen challenges that may arise during the installation process.

Keep in mind that improper installation of a water softener can lead to leaks, damage to plumbing fixtures, or even a malfunctioning system. Hiring a professional can help you avoid these potential issues and provide you with peace of mind.

Ultimately, the decision to install a water softener yourself or hire a professional depends on your level of comfort and experience with plumbing tasks. If you are unsure, it is always best to consult with a professional to ensure a successful installation.

Are there any specific certifications or standards that indicate a water softener is suitable for tankless water heaters?

Yes, there are specific certifications and standards that indicate a water softener is suitable for tankless water heaters. One important certification to look for is the NSF/ANSI 44 certification. This certification ensures that the water softener is designed to effectively reduce water hardness and is suitable for use with tankless water heaters. Additionally, you can also look for certifications from reputable organizations such as the Water Quality Association (WQA) or the International Association of Plumbing and Mechanical Officials (IAPMO). These certifications indicate that the water softener has been tested and meets specific standards for performance and safety. It's always a good idea to check for these certifications when choosing a water softener for your tankless water heater to ensure optimal performance and compatibility.

Steve Donaldson Master HVAC technician
Steve DonaldsonMaster HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

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14 Comments
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  1. The article was last updated on September 15, 2021. We strive to keep our content up to date.

  2. I highly recommend the Aquasure Harmony Water Softener. I’ve been using it for a few months now and it has made a noticeable difference in the quality of our water. It’s easy to install and operate.

  3. Can you please provide an update on when this article was last updated? I want to make sure the information is current.

  4. I recently purchased the Whirlpool WHES30E Softener and I’m quite satisfied with its performance. It really saves on salt and water usage, which is great for the environment.

  5. I have a tankless water heater for my swimming pool. Can any of these water softeners be used for pool water as well?

    • These water softeners are primarily designed for domestic use, such as for household faucets and showers. It’s best to consult with a pool specialist for suitable water softening solutions for your swimming pool.

  6. I’m planning to install a tankless water heater in my RV. Which water softener would you recommend for that specific application?

    • For an RV tankless water heater, I suggest considering the AQUACREST AP431 Whole House Scale Inhibitor. It provides effective scale inhibition in a compact size, making it suitable for RV use.

  7. Could you suggest any other water softeners that are suitable for smaller households? Many of these options seem better suited for larger homes.

    • If you have a smaller household, I would recommend considering the Waterdrop Scale Inhibitor Filter. It’s a compact option that can effectively soften water for smaller water heaters.

  8. Thank you for this informative roundup! I agree with the rankings and appreciate the detailed descriptions of each product.

    • You’re welcome! We’re glad you found the roundup helpful. If you have any further questions, feel free to ask.

  9. My favorite product from the list is the Whirlpool WHESFC Hybrid Softener/Filter. It combines the benefits of a water softener and a filter in one unit, saving space and providing excellent water quality.

  10. Could you expand on the NSF certification mentioned for several of these products? What does it mean and why is it important?

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