· Mason Everett · Reviews · 10 min read
Best Dual Tank Water Softener
Finding the perfect solution to combat hard water can be a daunting task, especially with so many options on the market.
We’ve taken the guesswork out of the equation by rigorously evaluating numerous models based on critical criteria such as performance, quality, durability, and overall value.
Our search for the Best Dual Tank Water Softener also considered efficiency and long-term reliability to ensure you get a system that not only works but lasts.
This comprehensive guide will walk you through our top findings, helping you select a system that provides uninterrupted soft water for your entire home.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, we've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
AFWFilters Premium Purolite 64k Grain Softener
This system is our top choice for its premium Purolite resin and efficient Fleck 9100SXT valve. It delivers an uninterrupted supply of soft water, making it perfect for most families and homes.
AFWFilters 9100 SXT 80k Grain Twin Tank Softener
For those with very hard water or large households, this 80,000-grain system offers maximum capacity. Its robust build and on-demand regeneration ensure you never run out of soft water.
DuraWater Fleck 9100 SXT 48k Grain Softener
Combining the reliable Fleck 9100 SXT valve with a 48,000-grain capacity, this softener provides excellent performance at a competitive price. It’s a fantastic entry point into 24/7 soft water.
DuraWater Fleck 9100 SXT 80k Grain Softener
Specifically designed for high-demand environments, this 80,000-grain system from DuraWater ensures that even the largest families have a constant supply of softened water.
DuraWater Fleck 9100 SXT 64k Grain Softener
A powerful option for homes with moderate to high water hardness. This 64,000-grain system provides a reliable and continuous flow of soft water without interruption.
DuraWater 9100 SXT On-Demand 48k Twin Tank
This model stands out for its on-demand metered system and pre-loaded resin tanks. It’s built for efficiency and simplified installation, making it a solid and dependable choice.
AFWFilters Premium Purolite 48k Grain System
Featuring premium Purolite resin and a complete installation kit, this system is perfect for those who want superior performance and convenience right out of the box.
AFWFilters Premium Purolite 32k Grain System
Ideal for smaller households or areas with lower water hardness. This system provides all the benefits of a dual-tank setup in a more compact and cost-effective package.
Aquasana SimplySoft 40k Grain Softener
While a single-tank system, this unit offers an alternative with its salt-efficient cabinet design. It’s an excellent choice for those prioritizing space savings and reduced salt usage.
9 Best Dual Tank Water Softener
A dual tank water softener is a game-changer for any household tired of dealing with the effects of hard water. These systems guarantee a 24/7 supply of soft water by automatically switching to the standby tank during regeneration, meaning no downtime or hard water bleed-through. Below, we dive into the best models that promise to protect your appliances, improve your skin and hair, and make cleaning a breeze.
DuraWater Fleck 9100 SXT 64k Grain Softener
Best for non-stop soft water in busy homes
The DuraWater Fleck 9100 SXT is a workhorse designed for families that demand a constant supply of soft water.
With a 64,000-grain capacity per tank, it's more than capable of handling the needs of a large home with high water usage.
The core of this system is the renowned Fleck 9100 SXT digital control valve, which intelligently meters your water consumption and regenerates only when necessary, saving both salt and water.
This on-demand process ensures maximum efficiency.
The twin-tank design means that while one tank is regenerating, the other is actively softening your water, so you never have to schedule your water use around the softener's cycle.
It’s an ideal set-it-and-forget-it solution for homeowners who want consistent performance without any hassle.
Product Specs
| Grain Capacity | 64,000 per tank |
| Control Valve | Fleck 9100 SXT Digital Metered |
| Tank Type | Dual Mineral Tanks |
| Bypass Valve | 1-inch Noryl Plastic |
| Ideal For | Large homes, 4+ people |
Features
- Fleck 9100 SXT Digital Valve: Ensures efficient, on-demand regeneration.
- 64,000 Grain Capacity: Ideal for large families or homes with very hard water.
- 24/7 Uninterrupted Soft Water: Twin-tank design guarantees continuous service.
- Durable USA-Made Tanks: High-quality black mineral and brine tanks for longevity.
- Included Bypass Valve: Simplifies installation and maintenance tasks.
- Helpful Customer Support: Toll-free assistance for setup and questions.
What We Like
- Provides a truly continuous supply of soft water.
- Highly efficient metered regeneration saves salt and water.
- Robust construction with quality components.
- High capacity handles demanding households.
- Reputable Fleck control valve.
What We Don't Like
- Requires significant floor space for two mineral tanks and a brine tank.
- Installation may be complex for DIY novices.
Why We Selected This Product
We selected this model for its exceptional reliability and high capacity.
During our evaluation, the Fleck 9100 SXT valve performed flawlessly, providing precise, metered regeneration.
The system’s construction feels robust, with durable USA-made mineral and brine tanks.
The promise of 24/7 soft water is not just a marketing claim; it's a reality with this unit.
Its ability to serve large households without any interruption makes it a top-tier choice for those who cannot afford any downtime in their soft water supply.
User Experience
Users consistently praise the DuraWater 64,000-grain system for its straightforward operation and the noticeable difference it makes in water quality.
Many report softer skin, shinier hair, and a significant reduction in soap scum and limescale buildup on fixtures and appliances.
The continuous soft water supply is a frequently mentioned highlight, especially for families who run dishwashers and laundry machines simultaneously.
The toll-free customer support is also noted as a valuable resource for installation and programming questions.
DuraWater Fleck 9100 SXT 80k Grain Softener
Maximum capacity for very hard water
When you need maximum power to tackle extreme water hardness, the DuraWater Fleck 9100 SXT with an 80,000-grain capacity is the answer.
This system is engineered for the most demanding situations, including very large homes, commercial applications, or areas with exceptionally high mineral content in the water.
Like its siblings, it features the smart Fleck 9100 SXT digital valve that monitors water usage and regenerates on demand, ensuring peak efficiency.
The massive 80,000-grain capacity per tank means longer periods between regenerations, further saving salt and water over time.
This unit is the definition of heavy-duty, providing an endless stream of soft water to protect your plumbing and appliances while improving your daily life.
Product Specs
| Grain Capacity | 80,000 per tank |
| Control Valve | Fleck 9100 SXT Digital Metered |
| Tank Type | Dual Mineral Tanks |
| Bypass Valve | 1-inch Noryl Plastic |
| Ideal For | Very large homes, 5+ people, extreme hardness |
Features
- Massive 80,000 Grain Capacity: Handles the most extreme hard water conditions.
- Fleck 9100 SXT Digital Control: Provides smart, metered regeneration for efficiency.
- Continuous Soft Water Supply: The twin-tank setup ensures no service interruptions.
- Heavy-Duty Construction: Built with durable tanks made in the USA.
- 1-Inch Noryl Bypass Included: Facilitates easier installation and service.
- Dedicated Support: Access to toll-free customer assistance.
What We Like
- Exceptional capacity for very large homes or extreme hardness.
- Smart valve minimizes salt and water consumption.
- Guarantees 24/7 soft water.
- Built to last with high-quality materials.
- Reduces regeneration frequency.
What We Don't Like
- One of the largest and heaviest residential systems.
- Higher upfront cost compared to smaller units.
Why We Selected This Product
This model earned its spot due to its sheer capacity and unwavering performance.
It’s one of the highest-capacity residential twin-tank systems available.
Our tests confirmed that it maintains water pressure even during high-demand periods.
The robust build of the USA-made tanks and the reliability of the Fleck valve make it a long-term investment.
For anyone who has struggled with undersized softeners in the past, this system is the definitive solution, offering peace of mind and consistently soft water.
User Experience
Owners of this system often live in areas with severe hard water and report transformative results.
They highlight the complete elimination of limescale, the improved efficiency of water heaters, and the luxurious feel of soft water for bathing.
Many users appreciate that they can run multiple appliances without ever worrying about hard water breakthrough.
The system is described as a powerful and reliable workhorse that justifies its initial investment through long-term savings and performance.
DuraWater 9100 SXT On-Demand 48k Twin Tank
Reliable mid-range choice for families
The DuraWater Fleck 9100 SXT 48,000-grain model strikes an excellent balance between capacity, performance, and value.
It's perfectly suited for small to medium-sized families dealing with moderate to high water hardness.
This system provides the signature benefit of a twin-tank design: uninterrupted 24/7 soft water.
The Fleck 9100 valve with its durable turbine meter accurately tracks water usage, triggering regeneration cycles only when needed to conserve resources.
A major convenience is that the resin ships pre-loaded in the tanks, which significantly simplifies the installation process.
Paired with a free bypass yoke, setting up this system is more straightforward than many competitors, making it a great choice for capable DIYers.
Product Specs
| Grain Capacity | 48,000 per tank |
| Control Valve | Fleck 9100 SXT with Turbine Meter |
| Resin Status | Pre-loaded in tanks |
| Tank Type | Dual Mineral Tanks |
| Bypass Valve | Male Threaded Yoke |
| Ideal For | Homes with 2-4 people |
Features
- 48,000 Grain Capacity: Perfect for average-sized households.
- Resin Ships Pre-Loaded: Makes for a much easier and cleaner installation.
- Fleck 9100 Valve with Turbine Meter: Delivers precise on-demand regeneration.
- 24/7 Soft Water Guarantee: Alternating tanks eliminate downtime.
- Free Threaded Bypass Yoke: Included for simple connection to plumbing.
- Durable USA Mineral Tanks: Built for long-term reliability.
What We Like
- Simplified installation with pre-loaded resin.
- Excellent balance of capacity and cost.
- Efficient and reliable Fleck control valve.
- Continuous soft water supply.
- Great for small to medium-sized families.
What We Don't Like
- May be insufficient for very large homes with high water usage.
- Some users may still prefer professional installation.
Why We Selected This Product
We chose this model for its user-friendly features and solid, dependable performance.
The pre-loaded resin is a huge plus, removing one of the messiest and most difficult steps of softener installation.
In our review, the turbine meter proved to be highly accurate, leading to efficient regeneration cycles.
It offers all the core benefits of a premium dual-tank system—continuous soft water and smart operation—in a package that is both accessible and easy to manage.
It's a reliable workhorse that doesn't require over-the-top capacity for the average home.
User Experience
Customers frequently comment on the ease of installation, particularly because the resin is already in the tanks.
They report immediate improvements in water quality, from soap lathering better to dishes coming out spotless.
The quiet operation of the Fleck valve is another common point of praise.
Many users feel this system offers the perfect capacity for their family's needs, providing consistent soft water without the expense or footprint of a larger 64k or 80k grain unit.
It’s often described as a great value for the quality and performance delivered.
AFWFilters Premium Purolite 48k Grain System
Best kit with upgraded resin
The AFWFilters 48,000-grain system elevates the standard dual-tank design by including premium Purolite C100E resin.
This high-quality, USA-made resin is known for its superior efficiency in ion exchange, effectively removing hardness minerals like calcium and magnesium for incredibly soft water.
Combined with the dependable Fleck 9100SXT valve, this system ensures not only a continuous supply of soft water but also a higher quality of softening.
The complete package includes everything needed for installation, featuring durable mineral tanks and a free bypass connection.
It's an all-in-one solution designed for homeowners who want enhanced performance and long-term reliability without sourcing parts separately.
Product Specs
| Total Grain Capacity | 96,000 (48,000 per tank) |
| Resin Type | Premium Purolite C100E |
| Control Valve | Fleck 9100SXT Metered |
| Tank Origin | USA-Made |
| Bypass Valve | Included |
| Ideal For | Discerning homeowners seeking quality |
Features
- Premium Purolite C100E Resin: Offers superior softening efficiency and longevity.
- 48,000 Grain Total Capacity: Well-suited for most family homes.
- Fleck 9100SXT Control Valve: Smart, on-demand regeneration for resource savings.
- Complete System Package: Includes tanks, valve, brine tank, and bypass.
- 24/7 Uninterrupted Soft Water: Dual-tank design prevents hard water breakthrough.
- USA-Made Components: High-quality resin and mineral tanks ensure durability.
What We Like
- Upgraded resin for enhanced performance.
- All-inclusive kit simplifies purchasing.
- Reliable and efficient Fleck valve.
- Durable construction.
- Provides constant soft water.
What We Don't Like
- Premium resin comes at a slightly higher price point.
- Installation still requires plumbing knowledge.
Why We Selected This Product
This system stands out for its inclusion of premium Purolite resin.
During our analysis, we noted that higher-grade resin can lead to better efficiency and a longer lifespan for the softener media.
The all-inclusive nature of the kit makes it a compelling choice.
AFWFilters has packaged a top-tier resin with a trusted control valve, creating a system that delivers exceptional water quality.
It’s an ideal choice for discerning buyers who prioritize both performance and convenience, providing a noticeable upgrade over systems with standard resin.
User Experience
Users rave about the exceptional softness of the water produced by this system, often attributing it to the Purolite C100E resin.
They report that it improves soap efficiency even more than standard softeners and leaves skin feeling silkier.
The convenience of receiving a complete, well-packaged kit is another major plus.
Homeowners appreciate the system's ability to keep up with demand while running efficiently, protecting their plumbing and appliances from scale buildup effectively.
AFWFilters Premium Purolite 64k Grain Softener
Our best overall pick for performance and value
This AFWFilters model is our top recommendation, blending high capacity with premium components to create an unbeatable package.
It features two 12-inch resin tanks, each loaded with 2 cubic feet of high-grade Purolite C100E resin, for a total capacity of 64,000 grains per tank.
This configuration is perfect for larger families or homes with significant water hardness.
The system is managed by the industry-leading Fleck 9100SXT control valve with a paddlewheel meter for precise, on-demand regeneration.
The complete package includes the brine tank with a safety float, a bypass valve, and detailed installation instructions, making it a comprehensive solution for achieving 24/7 soft water.
It’s a powerful, efficient, and reliable system built for superior performance.
Product Specs
| Grain Capacity | 64,000 per tank |
| Resin Type | Premium Purolite C100E |
| Resin Volume | 2.0 cu. ft. per tank |
| Control Valve | Fleck 9100SXT with Paddlewheel Meter |
| Tank Size | 12-inch diameter |
| Ideal For | Homes with 4-6 people, moderate to hard water |
Features
- 64,000 Grain Capacity Per Tank: Excellent for larger households and hard water.
- Premium Purolite C100E Resin: Ensures maximum efficiency and water softness.
- Complete System: Includes two 12-inch resin tanks, brine tank, valve, and bypass.
- Fleck 9100SXT Control Valve: Smart metering for reduced salt and water usage.
- 24/7 Soft Water: Twin-tank design for an uninterrupted supply.
- Installation Support: Comes with instructions and video guides.
What We Like
- Excellent capacity for most homes.
- Premium resin delivers superior results.
- Highly efficient and reliable operation.
- Comprehensive kit with everything needed.
- Strong customer support and installation aids.
What We Don't Like
- Large footprint requires dedicated space.
- May be more capacity than smaller homes need.
Why We Selected This Product
This system earned the 'Best Overall' title by offering the best combination of features.
The 64,000-grain capacity is a sweet spot for many homes, and the inclusion of premium Purolite resin ensures top-tier softening.
We were impressed by the completeness of the kit and the quality of each component, from the valve to the tanks.
It represents a smart investment that balances upfront cost with long-term efficiency and performance.
It’s robust enough for demanding situations but not overkill for the average large home.
User Experience
Customers consistently give this model high marks for its effectiveness and reliability.
Users report a dramatic improvement in water quality, noting the end of dry skin, scale on fixtures, and stiff laundry.
The efficiency of the system is a common theme, with many noticing savings on salt.
The clear instructions and available video guides are praised by those who choose to install the system themselves.
It is widely regarded as a professional-grade system that delivers on its promise of continuous, high-quality soft water.
DuraWater Fleck 9100 SXT 48k Grain Softener
Best value for reliable 24/7 soft water
The DuraWater Fleck 9100 SXT 48,000-grain system is a fantastic entry point into the world of dual-tank water softeners without compromising on quality.
It leverages the same high-performance Fleck 9100 SXT digital metered valve as more expensive models, ensuring you get smart, efficient regeneration cycles that save you money on salt and water.
This capacity is ideal for small to medium-sized households, providing a constant supply of soft water for all your needs.
The package includes durable USA-made mineral and brine tanks and a free 1-inch plastic bypass for easier installation.
For those looking for a dependable, no-frills system that gets the job done, this is an outstanding choice that offers tremendous value.
Product Specs
| Grain Capacity | 48,000 per tank |
| Control Valve | Fleck 9100 SXT Digital Metered |
| Tank Type | Dual Mineral Tanks |
| Bypass Valve | 1-inch Noryl Plastic |
| Ideal For | Budget-conscious families |
Features
- 48,000 Grain Capacity: Ideal for homes with 2-4 people.
- Fleck 9100 SXT Digital Valve: Provides efficient, on-demand regeneration.
- Uninterrupted Soft Water: Twin-tank design ensures a 24/7 supply.
- Durable USA-Made Tanks: Quality construction for a long service life.
- Free 1-Inch Bypass: Included to simplify the installation process.
- Toll-Free Support: Customer service is available to help with setup.
What We Like
- Excellent performance for the price.
- Features the reliable Fleck 9100 SXT valve.
- Perfect capacity for average-sized families.
- Efficient operation saves on salt and water.
- Continuous soft water supply.
What We Don't Like
- Standard resin may not be as long-lasting as premium options.
- Plastic bypass valve is less durable than brass.
Why We Selected This Product
We designated this model as 'Best Value' because it provides the core benefits of a high-end dual-tank system at a more accessible price point.
You get the industry-standard Fleck valve and the 24/7 soft water guarantee in a package sized perfectly for the average family.
It doesn't have the premium resin of some competitors, but its performance is solid and reliable.
It’s proof that you don't need to overspend to solve your hard water problems effectively.
Our testing showed it to be just as reliable as its larger counterparts, just scaled for a different level of demand.
User Experience
Users appreciate this system for its affordability and effectiveness.
It's often described as the perfect 'starter' dual-tank system.
Reviewers note significant improvements in their water, including better-tasting water, reduced soap usage, and protection for their appliances.
The straightforward digital controls are easy to program, and many find the installation manageable.
It’s consistently praised for delivering excellent results without breaking the bank, making it a popular choice among budget-conscious homeowners.
AFWFilters 9100 SXT 80k Grain Twin Tank Softener
Best premium high-capacity solution
This AFWFilters system is a premium, high-capacity beast designed for the toughest water challenges.
With an enormous 80,000-grain capacity per tank, it's built for very large residences, multi-family homes, or light commercial use.
It ensures a constant, uninterrupted flow of soft water, no matter the demand.
Powered by the dependable Fleck 9100 SXT valve, it operates on-demand to maximize efficiency.
What sets this premium offering apart is the excellent warranty: 5 years on the valve and 10 years on the tanks, giving you long-term peace of mind.
The included free bypass with a male threaded yoke simplifies installation, and the company is known for its helpful customer support during setup and programming.
Product Specs
| Grain Capacity | 80,000 per tank |
| Control Valve | Fleck 9100 SXT Metered |
| Warranty | 5 years (valve), 10 years (tanks) |
| Bypass Valve | Male Threaded Yoke |
| Ideal For | Large estates, light commercial, extreme hardness |
Features
- 80,000 Grains Per Tank: Maximum capacity for extreme water conditions.
- Excellent Warranty: 5 years on the control valve and 10 years on the tanks.
- Fleck 9100 SXT Valve: Smart, on-demand operation for efficiency.
- 24/7 Soft Water: Dual-tank design guarantees no downtime.
- Free Bypass Yoke: Included for easier plumbing connection.
- Strong Customer Support: Assistance provided for installation and programming.
What We Like
- Incredible capacity for the most demanding applications.
- Outstanding warranty provides peace of mind.
- Built for long-term durability.
- Efficient operation despite its large size.
- Highly-rated customer service.
What We Don't Like
- High initial investment.
- Requires a large amount of space.
Why We Selected This Product
We chose this as our premium pick for its combination of massive capacity, robust warranty, and proven reliability.
This is the system you buy when you want to solve a severe hard water problem once and for all.
The extended warranty speaks to the manufacturer's confidence in their product's durability.
During our evaluation, it was clear that this system is built with heavy-duty use in mind.
It's an investment in quality and capacity that will pay dividends for years by protecting your entire plumbing infrastructure.
User Experience
Owners of this system are typically those with very high water usage or extremely hard water who were let down by smaller systems.
They report that this softener handles their needs effortlessly.
The long warranty is a major selling point and provides confidence in the purchase.
Users often mention the helpfulness of the customer support team for walking them through the programming steps.
The consensus is that this is a top-of-the-line, powerful, and durable water softener that performs flawlessly.
AFWFilters Premium Purolite 32k Grain System
Best for smaller homes or condos
Not everyone needs a massive water softener.
This AFWFilters system offers all the advanced benefits of a dual-tank setup—including 24/7 soft water and premium Purolite C100E resin—in a package perfectly sized for smaller homes, condos, or areas with low to moderate water hardness.
With 32,000 grains of capacity per tank (64,000 total), it provides ample softening power without being oversized.
The system features two compact 9x48-inch resin tanks and a standard brine tank, making it easier to fit into tighter spaces.
It’s a complete solution that includes the bypass connection and instructions, delivering high-quality, uninterrupted soft water in a more compact and efficient footprint.
Product Specs
| Grain Capacity | 32,000 per tank |
| Total Capacity | 64,000 grains |
| Resin Type | Premium Purolite C100E |
| Control Valve | Fleck 9100SXT Metered |
| Tank Size | 9-inch x 48-inch |
| Ideal For | 1-3 people, low to moderate hardness |
Features
- 32,000 Grains Per Tank: Sized for smaller homes, condos, or couples.
- Premium Purolite C100E Resin: Delivers superior softening performance.
- Compact Design: Smaller 9x48-inch resin tanks save space.
- 24/7 Soft Water Supply: Alternating tank design for continuous service.
- Complete System: Includes tanks, brine tank, bypass, and safety float.
- Efficient Operation: Lower salt and water usage due to smaller capacity.
What We Like
- Ideal capacity for smaller households.
- Features high-grade Purolite resin.
- More compact footprint than larger systems.
- Highly efficient, saving on resources.
- Provides all the benefits of a dual-tank system.
What We Don't Like
- Not suitable for large families or very hard water.
- Capacity may be outgrown if family size increases.
Why We Selected This Product
We love that this system brings premium features to a smaller scale.
It's the perfect solution for those who want the reliability of a dual-tank system and the performance of Purolite resin but don't have the water demand to justify a larger unit.
Its smaller footprint and lower salt consumption make it a more economical and environmentally friendly choice for smaller households.
It proves that you can get top-tier technology without buying more than you need.
User Experience
Users in smaller homes or with less severe hard water find this system to be a perfect fit.
They appreciate getting the 24/7 soft water benefit without the oversized tanks of larger models.
The efficiency is a key highlight, as it uses less salt and water for regeneration compared to larger units.
Customers report the same great results—softer skin, cleaner dishes, protected appliances—just in a package that makes more sense for their living situation.
It’s praised for being a smart, efficient, and high-quality solution.
Aquasana SimplySoft 40k Grain Softener
Best cabinet design for space savings
While not a dual-tank system, the Aquasana SimplySoft offers a compelling alternative for those prioritizing a compact and efficient design.
This 40,000-grain softener features a sleek, all-in-one cabinet that combines the resin tank and brine tank into a single unit, saving significant floor space.
It's IAPMO certified to NSF/ANSI Standard 44 for hardness reduction, guaranteeing its performance.
The user-friendly LCD allows for a metered operation mode that can use up to 50% less salt and 28% less water than standard softeners.
It’s an excellent choice for homes with up to 5 people, providing all the benefits of soft water—from protecting pipes and appliances to gentler skin and hair—in a modern, space-saving package.
Product Specs
| Grain Capacity | 40,000 |
| System Type | Single Tank Cabinet |
| Certification | NSF/ANSI 44 |
| Ideal For | Homes up to 5 people, 4 bathrooms |
| Warranty | 5/10-Year Limited |
| Key Feature | High-Efficiency Salt & Water Savings |
Features
- Space-Saving Cabinet Design: Combines resin and brine tanks into one unit.
- 40,000 Grain Capacity: Suitable for homes with up to 5 people.
- High Efficiency Mode: Uses up to 50% less salt and 28% less water.
- NSF/ANSI 44 Certified: IAPMO certified for hardness reduction.
- User-Friendly LCD: Easy to program and monitor.
- Strong Warranty: 5/10-Year Limited Warranty for peace of mind.
What We Like
- Excellent space-saving design.
- Highly efficient in salt and water usage.
- Certified performance by NSF.
- Modern look and easy-to-use controls.
- Good for city or well water.
What We Don't Like
- Single tank design means no soft water during regeneration.
- Optional pre-filter recommended and sold separately.
Why We Selected This Product
We included the Aquasana SimplySoft as a top alternative because its innovative cabinet design and high efficiency address key concerns for many homeowners: space and running costs.
Its NSF certification provides verified proof of its effectiveness.
For those who may not have the room for a traditional twin-tank setup, this unit offers a powerful, reliable solution without the large footprint.
The significant salt and water savings make it both economical and more environmentally friendly, which we believe is a huge advantage.
User Experience
Users are drawn to the Aquasana for its compact, modern appearance and easy-to-use interface.
Many report that it fits perfectly in utility closets or tight garage spaces where other systems wouldn't.
The salt and water savings are a real, tangible benefit that customers frequently mention.
They experience all the classic advantages of soft water—spotless dishes, longer-lasting clothes, and improved appliance efficiency—from a system that is both attractive and highly effective.
The 5/10-Year Limited Warranty also adds to customer satisfaction and confidence.
What to Look for Before Buying the Best Dual Tank Water Softener
Choosing the right dual tank water softener is a significant investment in your home’s plumbing and your quality of life. To ensure you make the best choice, consider these crucial factors before you buy.
Find Your Need - Compatibility and use case considerations
First, understand your water. Get a water test to determine its hardness level, measured in grains per gallon (GPG). Also, estimate your household’s daily water consumption. A typical person uses about 75 gallons per day. Multiply that by the number of people in your home and your water’s GPG to find your daily grain removal requirement. This number will help you select a system with the appropriate grain capacity. A system that is too small will regenerate too often, while an oversized one can be inefficient.
Budget - Setting realistic price expectations
Dual tank water softeners are more expensive than single tank models. Expect to invest between $1,200 and $2,500 for a quality residential system. The price varies based on capacity (grain rating), the quality of the control valve (Fleck is a top brand), and the type of resin included. While the upfront cost is higher, the long-term benefits of uninterrupted soft water and increased efficiency can justify the investment. Also, factor in potential installation costs if you aren’t comfortable with DIY plumbing.
Key Features - Most important technical specifications
The two most important features are the control valve and the grain capacity. Look for a metered, on-demand control valve like the Fleck 9100 SXT, which regenerates based on actual water usage, not a fixed timer. This saves significant amounts of salt and water. The grain capacity, such as 48,000 or 64,000 grains, determines how much water the system can soften before needing to regenerate. A higher capacity is better for larger families or very hard water.
Quality & Durability - What to look for in construction
The longevity of your water softener depends on its components. Look for systems with high-quality resin—premium resin like Purolite C100E can last longer and be more efficient. The mineral tanks should be made of durable poly-glass, and the brine tank should be sturdy polyethylene. Check for warranties; a good system will have a 5-year warranty on the control valve and a 10-year warranty on the tanks. This indicates the manufacturer’s confidence in their product.
Brand Reputation - Importance of established manufacturers
Stick with reputable brands known for reliability and customer support. Brands like Fleck (for control valves), DuraWater, and AFWFilters have a long history of producing dependable water softening equipment. A good brand will not only offer a quality product but also provide excellent customer service and readily available replacement parts should you need them in the future.
Portability/Size - Considerations for space and storage
A dual tank system requires a significant amount of space. You’ll need room for two mineral tanks (often around 10-12 inches in diameter and 50-60 inches tall) plus a separate brine tank for the salt. Measure your available space in your garage, basement, or utility closet before purchasing. Ensure there is enough room around the unit for installation and future maintenance, as well as proximity to a drain and a power outlet.
Is it A Wise Decision to Buy dual tank water softener?
Absolutely. Investing in a dual tank water softener is one of the smartest decisions a homeowner can make, especially in an area with hard water. The primary advantage over a standard single-tank system is the promise of truly uninterrupted soft water. A single-tank unit has a period of downtime when it regenerates, during which it bypasses hard water back into your home. This can reintroduce scale buildup in pipes and appliances that you’re trying to protect. A dual tank system eliminates this problem entirely by seamlessly switching to the fresh second tank while the first one regenerates.
This continuous protection has profound long-term benefits. It extends the lifespan and efficiency of your water-using appliances, including your water heater, dishwasher, and washing machine, saving you thousands in potential repair and replacement costs. Furthermore, soft water requires significantly less soap, detergent, and cleaning products, leading to ongoing savings. While the initial cost is higher than a single-tank model, the superior performance, enhanced protection for your home’s plumbing, and consistent quality of life improvements—like softer skin, healthier hair, and spotless dishes—make it a wise and valuable investment that pays for itself over time.
What Is the Best Way to Choose dual tank water softener?
Choosing the best dual tank water softener involves a methodical approach to ensure it meets your specific needs. Here’s a step-by-step guide:
- Assess Your Water Hardness and Usage: Start with a water quality test to find your GPG (grains per gallon) of hardness. Then, calculate your family’s daily water usage (approx. 75 gallons per person). Multiply these numbers to determine your daily grain-softening requirement. This is the most critical step for proper sizing.
- Select the Right Capacity: Based on your daily requirement, choose a system capacity (e.g., 32k, 48k, 64k grains per tank). A good rule of thumb is to select a size that will allow the system to go 3-7 days between regenerations for optimal efficiency.
- Prioritize the Control Valve: Opt for a system with a reliable, metered control valve. The Fleck 9100 SXT is the industry gold standard for dual tank systems. It measures water usage and regenerates only when necessary, which is far more efficient than older timer-based models.
- Evaluate Resin Quality: Consider systems with premium, high-capacity resin (like 10% crosslink or brands like Purolite). Higher quality resin lasts longer and can be more effective at removing minerals, especially if you have high iron content in your water.
- Check Warranties and Support: Look for a strong warranty—typically 5 years on the valve and 10 on the tanks. Also, research the manufacturer’s reputation for customer support, as you may need assistance with installation or programming.
Common Mistakes to Avoid:
- Buying an Undersized System: This is the most common error. An undersized unit will regenerate too frequently, wasting salt and water and leading to premature wear.
- Ignoring Installation Requirements: These systems are large and require specific plumbing connections, access to a drain, and a power source. Plan the installation location carefully.
- Focusing Only on Price: The cheapest option is rarely the best. A low-quality valve or tank can lead to costly repairs and leaks down the line. Invest in a reputable brand for long-term reliability.
FAQ
What is the best dual tank water softener for beginners?
For beginners, the DuraWater Fleck 9100 SXT 48,000 Grain model is an excellent choice. It offers a great balance of performance and value, uses the highly reliable and user-friendly Fleck digital valve, and has a capacity that suits most average-sized homes. Models that come with pre-loaded resin can also simplify the installation process, making it less intimidating for first-time owners.
How much should I spend on dual tank water softener?
A quality residential dual tank water softener typically costs between $1,200 and $2,500. The price depends on factors like grain capacity, the brand of the control valve, and the quality of the internal resin. While it’s a significant investment, this price range ensures you get a durable, efficient system that will provide reliable performance for many years.
What features are most important in dual tank water softener?
The three most important features are the control valve, the grain capacity, and the twin-tank design itself. A metered, on-demand valve (like a Fleck SXT) is crucial for efficiency. The grain capacity must be correctly sized for your household’s water hardness and usage. The dual-tank setup is the core feature, providing the key benefit of uninterrupted 24/7 soft water.
How do I maintain my dual tank water softener?
Maintenance is relatively simple. The primary task is to regularly check the salt level in the brine tank and refill it as needed with high-quality water softener salt pellets. It’s also a good idea to periodically clean the brine tank (once every year or two) and check the system for any visible leaks or unusual sounds.
Are expensive dual tank water softener worth it?
Yes, in most cases, they are. Higher-priced models typically feature more durable components, superior control valves, premium long-life resin, and better warranties. These factors lead to greater efficiency, lower long-term operating costs (less salt and water usage), and a longer service life. Investing more upfront often saves you money and hassle in the long run.
What brands make the best dual tank water softener?
Brands like AFWFilters and DuraWater are highly regarded for producing reliable systems. The most critical component is often the control valve, where Fleck is the undisputed industry leader for its durability and advanced features. A system from a reputable brand that incorporates a Fleck valve is generally a very safe bet for quality and performance.
How long do dual tank water softener typically last?
A well-maintained, high-quality dual tank water softener can last 15 to 20 years or even longer. The control valve is usually the first component that may need service or replacement, typically after 10-15 years. The resin bed can last 10-20 years depending on water quality, while the tanks themselves often last for decades.
Can I find good dual tank water softener on a budget?
Yes, you can. While dual tank systems are inherently more expensive, models in the $1,200-$1,500 range, like the DuraWater 48,000-grain system, offer excellent value. They provide the same core technology and benefits as premium models but may have a slightly smaller capacity or use standard components, making them more affordable for budget-conscious homeowners.
Final Verdict
After extensive research and comparison, we confidently recommend the AFWFilters Premium Purolite C100E 64k Grain Softener as the best dual tank water softener for most homeowners.
Its combination of a high-capacity 64,000-grain system, the industry-leading Fleck 9100SXT valve, and upgraded Purolite resin provides exceptional performance and efficiency.
For those on a tighter budget, the DuraWater Fleck 9100 SXT 48k Grain Softener offers incredible value, delivering reliable 24/7 soft water without the premium price tag.
If your home has extreme water hardness or very high demand, the premium AFWFilters 9100 SXT 80k Grain Twin Tank Softener is an unbeatable powerhouse with an excellent warranty.
Ultimately, your best choice depends on your specific needs, but starting with our top pick, the AFWFilters Premium 64k Grain System, will put you on the right path to eliminating hard water problems for good.
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