10 Best Water Softener Reviews

by Curtis Grossi | Last Updated: March 14, 2024
Water Fountain

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Almost 85% of water supplies in the United States, and varying proportions in other countries, are understood to produce ‘hard water’, that is, water which contains levels of calcium and magnesium minerals that cause lime-scale deposits in water pipes, fittings, and appliances, especially when the water is heated.

85% of people in US have hard water

In addition to this, soaps, shampoos and some detergents do not perform well in hard water, producing less lather and sometimes a ‘soap-scum’ which inhibits cleaning properties.

This can lead to increased costs in terms of power for heating water such as in kettles and instant water heaters owing to the insulating effects of scale buildup on the heating element, more frequent replacement of appliances due to failures related to over-heating of elements, and the need for regular cleaning or replacement of blocked fittings such as shower heads. And of course there is also the cost of additional washing agents needed to produce the required level of cleaning.

30% of these people use a water softener

In order to combat lime-scale build-up and to improve cleaning efficiency, it is necessary to ‘soften’ or ‘condition’ the water as it enters your home.

Contents

The 10 Best Water Softener Reviews

1. 3M™ Aqua-Pure™ Whole House Water Filtration and Softener System, Model AP904 – Best All-In-One Water Softener

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If you’re looking for an all-in-one whole house filter that removes sediment, odors and scale in areas supplied by hard city water or low sediment well water, the 3M Aquapure AP904 Whole House Water Filtration and Softener System will improve water quality and taste while helping to protect your home’s hot water heaters, water-using appliances and plumbing fixtures from scale build-up.

Features

Made by world-renowned company 3M, it comes with a 25-year limited warranty on the stainless steel head and a one-year limited warranty on the AP917HD-S filter cartridge. It has a Sanitary Quick Change (SQC) feature that allows you to change the filter cartridge easily and with almost no spillage or mess, by simply twisting the cartridge out and replacing it with a new one. No need for a wrench or a screw-driver, and the filter housing features a secure, waterproof seal.

Instead of need the regular addition of salt for water softening, the AP917HD-S water filter cartridge incorporates scale inhibiting polyphosphates in minute quantities to bind calcium and magnesium hardness minerals, preventing them from precipitating out and building scale on metallic surfaces. In addition to scale inhibition media, the AP917HD-S water filter cartridge uses carbon block filtration and non-woven pleat media to exclude sediment down to 5 microns while also reducing chlorine taste and odor.

The filter cartridge should be replaced as soon as there is a noticeable drop in household water pressure. This may be only once a year, depending on the quality of the input water, but if the replacement intervals are shorter than expected, the lifespan of the filter can be extended by installing a 5 micron sediment or spin-down filter in line ahead of the 3M Aquapure system.

No electrical power is needed to operate the AP904 whole house water filtration system.

Benefits

With a flow rate of 10GPM (37.85 liters/minute) and a rated treatment volume of 100,000 gallons (378,500 liters), the 3M AP904 whole house water filtration system delivers enough safe, crystal clear, soft water for a home containing up to two and a half bathrooms. The materials used in the system are FDA CFR-21 compliant and are safe for drinking water and food.

Pros

  • A very affordable system;
  • Made from good quality food and drinking water safe materials;
  • Multi-purpose water filter and softener;
  • The system is simple to install;
  • The filter cartridge is easy to replace;
  • No addition of salt is required;
  • The system doesn’t use electricity.

Cons

  • Limited water hardness treatment capacity;
  • No light or volume monitor to indicate elapsing of replacement period;
  • AP917HD-S filter cartridges are relatively expensive;
  • A pre-filter is necessary if the system is used for high sediment well water.

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Who It’s For

Given the good quality of water produced, the sturdy build of the system, the simplicity of installation and the low maintenance aspect of the system, as well as the ease with which filter cartridges can be replaced, the 3M Aquapure AP904 Whole House Water Filtration and Softener System is a great option for those who would prefer to avoid sodium-based water softeners.

For a more in-depth review and details: 3M™ Aqua-Pure™ Whole House Water Filtration and Softener System, Model AP904 Review


2. Eddy Electronic Water Descaler – Best Water Softener Alternative

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Standard salt-based ion-exchange water softeners replace the calcium that causes water hardness with sodium to reduce lime-scale and promote lathering, so if you’re on a low sodium diet, you may want to avoid a water softener that uses salt or potassium.

Or you may just be tired of having to lug bags of salt around every time you need to replenish your water softener? There are a number of alternatives, but for an absolute no-maintenance option, the Eddy Electronic Water Descaler is a great choice.

Features

The Eddy Electronic Water Descaler does not replace health-giving calcium with sodium, as with salt-based ion-exchange water softeners, so your water will still be full of healthy compounds, they just won’t be such a nuisance to the pipes and appliances in your home.

The Eddy Electronic Water Descaler uses only 5 Watts of energy and reduces lime-scale buildup by 42%, with the remaining scale becoming soft and easy to remove. It has been reported to also improve lathering to remove existing scale. It is easy to fit, doesn’t require any plumbing or alterations and once it’s in place, you can forget about it.

Installation is as easy as winding two cables around your household water inlet pipe, connecting them to the control unit, plugging in the power and switching it on. How easy is that!

Warranty

If you’re not satisfied with the performance of your Eddy Electronic Water Descaler, you can return it within 12 months of date of purchase and you will receive a full refund, although Eddy states that they have had a very small percentage of returns as most customers find it beneficial.

Benefits

Because the Eddy Electronic Water Descaler does not need to be plumbed into your household pipework, doesn’t need salt to operate and has no need for a backwash cycle, it saves you all round on costs, time and effort, while also being easier on the environment.​

Pros

  • Easy to install
  • No maintenance
  • No salt needed
  • No wasted water
  • Suitable for people on a low-sodium diet
  • Removes lime-scale from pipes and fittings
  • Good customer service and returns policy

Cons

  • Does not soften water as much as a conventional salt-based water softener
  • Relatively expensive for its performance

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Who It’s For

Suitable for people on a low sodium diet and/or people that don’t want to use a water softener that uses salt or potassium.

For a more in-depth review and details click here:  Eddy Electronic Water Descaler Review


3. Watts RV PRO-1000 OR M7002 10000 Grains Portable – Most Popular Portable Water Softener

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The avid RV enthusiast will know from experience that many sites supply water that is hard, difficult to wash with, and can lead to scale in your RV’s pipes, tanks, and water heater, as well as in the kettle. Rather than going to the expense and hassle of having a water softener system built into your RV, consider the benefits of the RV-PRO (Watts M7002) 10,000 Portable Water Softener.

Features

The RV-PRO 10,000 can handle a flow rate of up to 4 GPM (15.1l/min), although the flow rate at any faucet in an RV usually about 1 gallon per minute (3.79l/min).

The RV-PRO 10,000 Portable Water Softener is 20.5” high and 8.5” in diameter and it weighs 26lbs when loaded with resin. The full cradle base on the tank keeps the system sturdy and secure when you need to work on it, and it won’t fall over unnecessarily and cause breakages. The tough, lightweight fiberglass tank body will stand up to years of use in the outdoor environment.

The water softener comes supplied with 1/3 cu. ft. (9.43dm³) superior quality gold resin with a high 10,000 grain capacity, and can last over 10 years, dependent on water hardness and volumes treated. The resin is pre-treated so there is no need to add salt to the system before its first use.

Its custom-designed output valve allows the output line to be isolated from the drain line so that it is not necessary to disconnect the system during regeneration.

Benefits

It is light and easy to use and can be placed inside or outside your RV. It uses just 2 lbs (0.9kg) of ordinary table salt for regeneration, so it only costs pennies per gallon to operate. Its built-in drain line flow restrictor increase its regeneration efficiency and it is very simple to use.

Pros

  • The system is compact and portable.
  • The system is simple and easy to use.
  • The valve design promotes efficient regeneration.
  • It uses ordinary table salt for regeneration so is very economical to operate.

Cons

  • The stationary inlet hose connector is difficult to attach a feed hose to.
  • The y-valve is made of plastic and can break if not used correctly (never lift the system by the valve).

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Who It’s For

Watts RV PRO-1000 Portable Water Softene is the ideal companion for the RV enthusiasts that likes to explore out of the way places, as well as the regular camper who frequents sites that have hard water.

Pricing and Purchase

Most users have been very satisfied with the performance of the RV-PRO (Watts M7002) 10,000 Portable Water Softener, once they have got used to the operation of the system. As they said after they have purchased it, they wish they had got it earlier!

In depth review and details:  Watts RV PRO-1000 OR M7002 10000 Grains Portable Water Softener


4. On The Go OTG4-DBLSOFT-Portable 16,000 Grain RV – Best Portable Water Softener for RV’ers and Boat Owners

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The On The Go OTG4-DBLSOFT Portable 16,000 Grain RV Water Softener is an essential appliance for RV enthusiasts and boat owners who are likely to hook up to water supplies that contain hard water.

Features

It is designed by RV enthusiasts for use by RV’ers and boat-owners, taking into account all the challenges they face. The unit uses standard table salt for regeneration, is light and compact, has a carry handle on top of its swivel head for ease of movement and connection, and has a large opening for pouring in the salt.

It includes storage inlet/outlet caps, back-flush adapter, hardness test strips, a 4’ (1.2m) white drinking hose, as well as a full cradle base for stability.

The unit comes ready to use, with a simple 5-step setup procedure. It is pre-charged with salt and contains a resin softener medium that should last at least 5 to 8 years if used correctly. It uses a standard hose connection and requires no tools to connect, disconnect, or open the system.​

Benefits

This unit can provide up to 40 days of softened water, or 500 to 1,600 gallons (1.9kl to 6.0kl), before needing regeneration, depending on water hardness and volumes used. The large mouth on the top of the unit allows you to easily refill with salt without spillage or waste.

Pros

  • Compact and portable with a stable base
  • Uses common table salt for regeneration
  • Has a 360° swivel head for easy connection of hoses
  • Features a wide opening for pouring in the salt
  • Has a relatively high capacity
  • Easy to assemble and maintain, no tools required
  • Water hardness test strips supplied with the system

Cons

  • No sediment filter
  • Need to disconnect from vehicle to regenerate
  • No indicator to warn when regeneration is needed

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Warranty

Each On The Go® Portable Water Softener is covered by a limited warranty of one-year from date of purchase on materials and workmanship, as well as a 30-day customer return and refund (excluding transport costs) policy.

Who It’s For

The lightweight, stable unit is easy to set up and store away, making it indispensable to any RV or boat owner who values their investment.

By protecting your RV’s water system for pennies per day, the ‘On The Go’ OTG4-DBLSOFT Portable 16,000 Grain RV Water Softener will improve the resale value of your RV when you decide to sell it or trade it in.

For more in depth review and details:  On The Go OTG4-DBLSOFT-Portable 16,000 Grain RV Water Softener Review


5. Fleck 5600SXT 48,000 Grain – Best Whole House Water Softener System

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The Fleck 5600SXT 48,000 Grain Water Softener Digital SXT Metered Whole House System is a whole house ion exchange water softener system with a digital controller and readout that makes it easy to monitor the state of your household water. 

Features

The digital monitoring system on the Fleck 5600SXT measures water volume rather than time elapsed, making it much more efficient than mechanical softener control systems, and it has less moving parts so less potential for breakage.

The regeneration cycle can be programmed to occur at time that is most convenient for your household and it provides a double-backwash (one slow and one rapid backwash) to improve the efficiency of the process.

It has a programmable digital control system with a built-in memory that will last over 48 hours during a power cut, and retains your settings as well as a record of the amount of water softening still available. No need to reset everything when power is restored – it’s all still there for your convenience.

The brine tank has a safety float that prevents over-filling, as well as an overflow outlet that can be linked to the backwash drain, so there won’t be any mess to clean up. Its large volume also means that you need to add salt much less frequently; it uses about one 50lb bag of salt per month for a 4-person household, depending on the hardness of the water.

Benefits

It will remove the calcium and magnesium that cause hard water in your pipes and the build-up of scale in your appliances, leaving you with soft water that improves soap efficiency and gives you a more enjoyable washing experience.​

Pros

  • Digital read-out showing remaining volume of water to be treated
  • Programmable with automatic regeneration cycles (with a maximum of 14 days)
  • Memory backup for programmed entries
  • Flow meter rather than timer for more accurate regeneration cycles
  • Large capacity at 48,000 grains
  • By-pass valve for convenience
  • 5-year warranty on valve, 10-year warranty on tank

Cons

  • Difficult to understand installation manual
  • Does not filter water
  • Relatively large size
  • No low salt warning light

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Warranty

The ion-exchange system uses high quality resin balls that last up to seven years, there is a five year warranty on the control valve, and the tank has a 10-year warranty, so you can enjoy peace of mind with your Fleck 5600SXT 48,000 Grain Water Softener for years to come.

Who It’s For

If you have a problem with hard water and want a convenient, easy to use and reliable water softener, the Fleck 5600SXT is what you are looking for.

For a more in-depth review and details:  Fleck 5600SXT 48,000 Grain Water Softener Review


6.  Iron Pro 2 Combination Water Softener and Iron Filter Fleck 5600SXT – Best Water Softener Iron Filter

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Although treated city water generally contains low levels of iron and manganese, most well-water sources contain higher levels of iron that can cause red/brown stains in plumbing fixtures such as toilet bowls, and staining of laundry. The Iron Pro 2 Combination System is one of the most effective systems for dealing with hard water that also contains medium levels of iron.

Features

The reliable Fleck 5600SXT digitally controlled valve works on a turbine-electronic flow meter instead of a timer or manual flow meter, giving you a more accurate measure of the amount of water treated by the system, making for a more efficient rate of regeneration. With just a single moving part, there is less to go wrong, and the digital control allows the timing of the regeneration cycle to be set so that it takes place at a convenient time when no-one in the house is using water, so no untreated water flows through the bypass valve and into your household pipes.

The built-in memory facility means that the digital control settings are retained for over 48 hours even if the power supply is accidentally unplugged or there is a power cut, so you will know how much water treatment capacity remains when power is restored, and you won’t need to redo the settings.

Benefits

The Iron Pro 2 Combination Water Softener and Iron Filter is a whole house system that will improve the quality of your household water without the need for a multitude of systems. It removes up to 64,000 grains of impurities (calcium, magnesium, iron and manganese) from your water supply to leave you with soft, non-staining household water for improved all-round washing performance.

Pros

  • Combined iron removal and water softening;
  • Digital readout provides useful information;
  • Programmable regeneration settings provide user convenience;
  • 48-hour memory backup saves settings so they are not lost if power to the system is cut;
  • Fine mesh resin for better performance;
  • Double backwash for more efficient regeneration.

Cons

  • The system is large, it needs a lot of space to install;
  • The installation instructions can be difficult to follow;
  • The combined water softener and iron filter system requires a relatively large financial layout (but is not as expensive as two separate systems).

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Warranty

With a 30-day satisfaction guarantee backed by a 5 year warranty on the valve and a 10 year warranty on the tank, you can buy the Iron Pro 2 Combination system with confidence.​

Who It’s For

The Iron Pro 2 system can treat up to 16GPM (60.6l/min) of water, but the recommended service flow is 13 GPM (49.2l/min), that is, suitable for a household size of five to seven people.

Review and details:  Iron Pro 2 Combination Water Softener Iron Filter Review


7. Aquasana 1,000,000 Gallon Water Filter with Salt-Free Softener and Professional Installation Kit – Premium Water Softener System

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The Aquasana 1,000,000 Gallon Whole House Water Filter with Salt-Free Softener, also known as the ‘Pro Rhino + Softener’ system, or the EQ-1000 with SimplySoft, is a combined point of entry water conditioning and filter system with a massive one million gallon treatment capacity. 

Features

The Aquasana Salt-free Softener system uses proven Nucleation Assisted Crystallization (NAC / TAC) water conditioning in place of a salt-based softener to reduce lime-scale formation and has a .35 micron post-filter to further reduce any remaining sediment and organic particles in your household water.

It requires no salt or regeneration so there is no need to carry heavy salt bags or pour the salt into a brine tank every few days, and you won’t be adding sodium to your household water or discharging salty water into the environment.

It also doesn’t use electricity so there’s no need to have an electrical socket located nearby, and the system won’t demineralize your water while it protects your home’s plumbing, fittings and appliances from scale build-up.

Benefits

The system uses a combination of filters and filtering techniques in order to catch silt, sediment and rust, reduce chlorine, water soluble heavy metals, herbicides, pesticides, smells and odors, and to inhibit bacterial and algal growth in the water.​

Pros

  • Low maintenance
  • High capacity, long lasting
  • No electricity or salt required, or wasted water
  • Filters out chlorine and a number of other heavy metals, VOC’s and synthetic chemicals
  • Has a 5-micron pre-filter to protect the main system

Cons

  • Not for water hardness over 25gpg
  • Must be installed by a licensed plumber to validate warranty
  • Not an actual water softener, but a conditioner
  • Does not contain built-in shut off valve
  • Lack of technical specs and information

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Warranty

The Aquasana System has a 10-year limited Warranty on defects in material and workmanship, as well as a 90-day from date of receipt ‘pure satisfaction’ money-back guarantee. The main filters have a capacity of 1,000,000 gallons (3,785kl) at a miximum of 25gpg, with an estimated service lifespan of 8 to 10 years for a 4-person family. The 20” 5-micron pre-filter has an expected lifespan of 2 to 3 months.

Who It’s For

It is designed for homes up to 3,500 sq. ft. (325m²) in size with 3½ bathrooms or less, and is intended for use with city water where the filter is able to remove up to 97% of chlorine in the water supply.

A UV filter can be added after the system as an optional extra, but this is usually only required for rural well water supplies.

Review and details:  Aquasana Salt-free Softener System Review


8. WaterBoss Water Softener – Model 900 – Best Well Water Softener System

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For large family homes using well water, the WaterBoss Water Softener Model 900 is a great option. It is an attractive programmable water softener with a 36,400 grain capacity that can soften up to 90 grains per gallon while reducing up to 10 parts per million (ppm) of ferrous iron and sediment.

Features

The all-in-one water softener has an enclosed design and integrated controls are all packaged in a stylish compact casing that would not look out of place anywhere in your home.

In its default high-efficiency mode, it uses up to 80% less water and 50% less salt than other home water softener, and it also features a built-in, whole-house, self-cleaning dirt and a sediment filter.

It has a programmable digital control panel with four buttons and an LCD display that allows you to set and monitor the status of the softener at the press of a button.

Its detailed user manual has easy to follow step by step instructions to help you change any of the default setting to suit your particular household situation, if necessary. For instance, the six-cycle regeneration process is triggered when the softening capacity is exhausted, but you can program in a delay so that it regenerates at a specific time of day when no water is being used.​

Benefits

This USA-made unit offers whole house water softening, as well as iron filtering and a degree of sediment filtering. It has a built-in self-cleaning whole-house water filter that does not require cartridge changes, and also features a powerCleanTM option that can be run every six months for areas where the water has a high iron content, to ensure a long service life for the water softener.​

Pros

  • Compact, attractive design
  • Comprehensive instructions for installation, setting and maintenance
  • Digital Controller with a variety of optional settings
  • powerCleanTM feature for use when high levels of iron are present in the water
  • Demand led regeneration based on water flow, timed regeneration as an option
  • High Efficiency or High Capacity regeneration options
  • Remaining water indication
  • Built-in self-cleaning sediment filter

Cons

  • May not be suitable for chlorinated water supply
  • Screws are exposed to salt and tend to corrode, causing leaks
  • Reports of poor customer service
  • Reports of quality issues with magnetic wheel design

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Warranty

The WaterBoss 900 water softener has a 3-year limited warranty on the entire appliance and a 10-year limited warranty on the brine cabinet and resin tank.​

Who It’s For

The WaterBoss 900 Water Filter is best suited for well water, but for city water with high chlorine content, you should look at the 950 model.

See our review and details:  WaterBoss Water Softener Model 900 Review


9. Aquios FS-220 Salt Free Water Softener and Filtration System – Best Whole House All-In-One Water Conditioner and Sediment Filter

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As a salt-free water conditioner with built-in sediment and chlorine filter, the Aquios FS-220 system is hard to beat. It’s a whole house all-in-one water conditioner and sediment filter with a slim profile and Valve-In-Head design that makes it easy to install in small spaces, while it allows filter cartridge replacement without any mess and spillage.

Features

The solid carbon sediment filter prevents the release of carbon fines and will remove sediment, chlorine taste, odor and organic contaminants from the water, while the polyphosphate water conditioner, unlike salt-based systems, will not replace healthy minerals in your water with sodium. It will, however, prevent water hardness minerals forming lime-scale in your household water-pipes, fittings and appliances.​

The result will be clean, pure, healthy water for you and your family.

This technology used is a natural, FDA-approved, food-grade polyphosphate additive known as Siliphos that acts to inhibit the formation of scale deposits and will, over time, reduce the build-up of lime-scale deposits in your water pipes, appliances and water heaters. It will also result in your water feeling better but not ‘slippery’ as with salt water softeners.

​The AQUIOS Water Treatment System includes your first high absorption RCFS220 filter cartridge which has a 5 micron filter rating with effective water hardness reduction of 22 grains per gallon (380ppm) and chlorine reduction of 12,000ppm at 2 GPM. The cartridge is rated for treatment of up to 40,000 gallons of water but its period of service depends on the hardness of the water being processed. It should, however, be replaced at least every 6 months.

The system’s design requires no programming or electricity, ensures virtually no reduction in water pressure or flow rate.

Benefits

With all these benefits, the Aquios FR-220 Salt-Free Whole House Water Softener and Filtration System is certainly well worth considering.​

Pros

  • No salt required
  • No electricity required
  • Combined water softener and filtration system
  • In-head valve with bypass and shut-off functions
  • Solid Carbon Block filter prevents release of carbon fines

Cons

  • Cartridge replacement can be expensive
  • No indicator of when filter capacity / replacement is approaching

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Warranty

The system comes with a 20-year limited warranty on the housing and valve.​

Who It’s For

The system is designed for homes ranging to 3,000 square feet (278m²) in size with up to 3 full bathrooms, and its replaceable filter cartridge combines carbon block filtration with commercial grade water conditioning technology to deliver a full house, all in one solution.

Review and details:  Aquios FS-220 Salt Free Water Softener and Filtration System Review


10. Nuvo H20 DPHB Home Salt-free Water Softener System – Best Compact Water Softener

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The NuvoH2O DPHB Home Salt-free Water Softener System is a compact, low maintenance point-of-entry cartridge-based water conditioner designed for use on treated municipal water supplies, but can be used on well water if a sediment filter is also used.

The system is technically a water conditioner, as it uses a process of chelation to prevent hardness minerals in water from forming compounds that adhere to surfaces in the water system resulting in a hard lime-scale layer, rather than replacing calcium and magnesium hardness ions with sodium ions as occurs in a salt-based water softener.

Features

Its in-line design with a built-in valve in the cartridge-holder head, makes it easy to install and cartridges can be changed out with minimum of fuss and mess. The proprietary CitraCharge formulation in the cartridge contains an FDA-approved citric acid based solution that lowers the alkalinity level (pH) of the water, increasing its capacity to hold hardness ions in suspension.

Each cartridge is rated for 35,000 gallons (132,500 liters) of water and lasts typically for 6 months of normal household usage.

The NuvoH2O Home Salt-free System does not use ion-exchange technology and thus there is no need for either regeneration of resin media or the addition of salt, and it is not necessary to have a drain point nearby. It also does not contain any electrical or electronic components and so doesn’t need an electrical connection nearby.

This system has been independently tested on water with a hardness level of approximately 15 grains per gallon (259ppm) and a pH level of 7.8 to 8.0, and is designed for a home of between 1,000 sq. ft. (93m²) and 2,000 sq. ft. (186m²) in size.

The tests showed that the NuvoH2O system effectively prevented over 98% of scale formation compared with untreated water. Its ability to prevent scale formation also led to a 27% energy saving in water heating, when compared with untreated water.

A summary of the study and results is available on the NuvoH20 website.

Benefits

Overall, the NuvoH2O Home Salt-free System will noticeably reduce the formation of scale and improve the quality of water in small to medium size homes with water hardness that is not at excessive levels, and if used in conjunction with an appropriate water filter.

Pros

  • Compact and easy to use
  • Does not require salt or regeneration
  • Does not waste water
  • Does not require electrical power or drain point
  • Saves on energy consumption
  • Lifetime Warranty and 90-day Return Policy

Cons

  • Does not filter sediment, chlorine or organic contaminants
  • Cartridge replacement required
  • Works on limited water hardness
  • Considered relatively expensive

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Warranty

NuvoH2O systems come with a limited lifetime warranty on non-consumable parts, fully transferable with the sale of the premises, as well as a 90-day from proof of purchase Money Back Guarantee, less shipping and handling costs.

Who It’s For

NuvoH2O Home Salt-free System will noticeably reduce the formation of scale and improve the quality of water in small to medium size homes with water hardness that is not at excessive levels, and if used in conjunction with an appropriate water filter.

For more details read:  Nuvo H20 DPHB Home Salt-free Water Softener System Review


Best Water Softener Comparison Chart

ModelPriceBrandEditor RatingGrainsDimensionsWeight
3M Aqua-Pure Whole House Water Filtration System – Model AP904$$3M Aqua-Pure4.0/5n/a25.2 x 4.5 x 4.51 pound
Eddy Electronic Water Descaler - Water Softener Alternative$Eddy Water Descalers3.8/5n/a6.7 x 1.6 x 3.51.4 pounds
Watts RV PRO-1000 OR M7002 10000 Grains Portable Water Softener$Watts Water Technologies4.2/510,00021 x 9.5 x 99 pounds
On The Go OTG4-DBLSOFT-Portable 16,000 Grain RV Water Softener$$On The Go4.8/516,00022 x 9.5 x 9.532 pounds
Fleck 5600SXT 48,000 Grain Water Softener Digital SXT Metered Whole House System$$$$Fleck Structural4.6/548,00010 x 0.1 x 54150 pounds
Iron Pro 2 Combination water softener iron filter$$$$$Fleck Structural4.3/564,00048 x 12 x 12180 pounds
Aquasana 1,000,000 Gallon Whole House Water Filter with Salt-Free Softener and Professional Installation Kit$$$$$+Aquasana3.8/51,000,0009 x 46 x 5483.2 pounds
Nuvo H20 DPHB Home Salt-free Water Softener System$$Nuvo3.3/5n/a5 x 5 x 248 pounds
WaterBoss Water Softener - 36,400 Grain Capacity, Model# 900$$$Water Boss3.5/536,40015.8 x 19.8 x 32105 pounds
Aquios FS-220 Salt Free Water Softener and Filtration System, Blue$$$Aquios3.3/540,00027 x 10 x 89.3 pounds

Water Softener Buying Guide

What Is A Water Softener And How Does It Work?​

A water softener is a device that removes water hardening chemicals in the form of calcium and magnesium minerals from hard water and replaces them with the sodium component of salt in a process called ion-exchange. Sodium does not combine with other minerals in the way that calcium and magnesium do to form ‘lime-scale’ but remains in solution in the water. This prevents the build-up of scale in water pipes and fittings, and water heating appliances, and allows soaps, shampoos, and detergents to foam more easily.

softening system

Water softeners usually consist of two parts, namely a brine tank which needs to be topped up with extra coarse salt or solar salt (or manganese-chloride in place of the salt for sodium-sensitive households) on a regular basis, and an ion-exchange resin tank where the water softening process takes place. The resin will need to be ‘regenerated’ on a regular basis as well, but most household systems do this automatically, with an electronically controlled valve. The main exception is a portable water softener, used mainly by RV-enthusiasts, which needs to be manually regenerated.​

“Salt-free water softeners” are devices that prevent the buildup of lime-scale without the use of the manganese or salt-based ion-exchange process, and are correctly termed water ‘conditioners’ or ‘de-scalers’ rather than water softeners. In most cases, the water conditioner uses a process that ‘modifies’ the calcium and magnesium ions so that they do not combine with carbon dioxide in the water to form lime-scale.

Any scale that does form will not adhere to surfaces and may actually remove the existing scale over time. Where water containing the ‘conditioned’ ions evaporates, such as on kitchen or bathroom surfaces, the white layer that is left is more powdery than scale, and can easily be wiped away with a cloth. Most water conditioners use an active ingredient that is impregnated in a replaceable cartridge, which requires periodic replacement but does not require any electrical power.

Water conditioners should generally be used in areas where the water is not very ‘hard’, that is to say, where water hardness does not exceed 10.5gpg or 180mg/l. They will still reduce scale formation by up to 98% at hardness levels of 15gpg and be relatively effective up to about 25gpg, but above this level their effectiveness may not be sufficient to warrant the cost.​

Some water conditioners, termed ‘de-scalers’, use electromagnetic pulses to condition hard water so as to reduce and remove scale build-up, but their effectiveness and efficiency appears to be about half that of cartridge-type water conditioners, based on tests carried out by the Ira A Fulton School of Engineering at the Arizona State University. They have the advantage that there is no cartridge or salt that needs to be replaced or replenished, so they are considered maintenance-free.

However, they should not be used for very hard water sources. There is much controversy about whether these devices actually work at all, however, especially those that use permanent magnets rather than electric pulses.

Do I Need A Water Softener?

​If you find that you have scale deposits building up on your shower head, faucet outlet, or in your kettle, you will need to install a water softener in the water supply to your home. When buying a home, ask the agent or the neighbors about the water hardness in the area. If it is a new home, you could ask the neighbors, or if in a new neighborhood, go to the local water utility offices to find out about the water hardness.

Hard water levels in United States
Find here more about the patterns of water hardness in the United States

Should you be informed, or suspect, that the area suffers from ‘hard’ water (harness part, you should either purchase a home water test kit, or engage an expert to test the water quality. This is because it is important to know the water hardness, expressed in grains per gallon (gpg), milligrams per liter (mg/l) or parts per million (ppm), before deciding on which type and model of water softener you need to install.

For example, if your water hardness is measured at 25gpg, and you purchase a 100,000 grain water softener, you will be able to soften about 4,000 gallons of water before the system needs to regenerate with salt. Should your household be using 500 gallons of water per day, your system will need to regenerate approximately every 8 days.​

Water Softeners vs. Water Filtration Systems

Water softeners should not be confused with water filters, as they are used for different functions. A water softener is used to replace or condition scale-producing minerals in ‘hard’ water in order to reduce the formation of lime-scale and improve detergent performance. The function of water filters is to remove particles, chemicals and dissolved organic compounds that may pose health risks or cause discoloration of the water.

Water filters are available for a range of different uses, from basic sediment filters for removing silt and sand particles from a water supply, to carbon block filters for removing chlorine and similar chemicals from water, to reverse osmosis (RO) systems which remove almost everything from the water and produce almost sterile water as an end product.

It is possible to purchase combined water softener and water filter systems, although these often in reality combine water filters with water conditioners, rather than true ion-exchange water softeners.

It should also be noted that water softeners will remove a certain amount of soluble iron from water, but that this will reduce the effectiveness of the water softener. Each grain of iron hardness is equivalent to 3 to 4 grains of calcium or magnesium hardness. So iron removal should preferably be undertaken by a separate filter, unless one uses a specific combination water softener and iron filter such as the Iron Pro 2.

In many cases, it may be wise to use a pre-filter ahead of a water softener or water conditioner system, in order to reduce the number of solids entering the system and avoid problems of clogging and coating of active elements by sediment. A simple spin-down sediment filter is a cheap and easy to maintain solution, but for poor quality water, such as well water, it might be necessary to use a more effective filter.

What Kind Of Water Softener Do I Need?

A number of different types of water softener are available for you to choose from, according to your particular need.

Portable vs Standard

Portable water softeners are aimed at the RV enthusiast, and to a lesser extent, at boat owners. These systems are smaller than standard water softeners and require regeneration to be undertaken manually by adding salt to the tank and reversing the flow of water through the softener. Portable water softeners often operate with ordinary table salt, rather than coarse or solar salt as required by standard household water softeners, so they cost only pennies per gallon to run.

They resemble agricultural spray tanks and can quickly and easily be connected via a water hose to a water supply faucet at a trailer park or campsite, and just as quickly disconnected and stored away.

Electric versus Non-electric

Electric water softeners have automated electronic timers and valves for activating the backwash cycles on either a time or volume basis. More advanced digital controls will indicate how many gallons of hard water can still be softened before the next regeneration cycle.

Non-electric systems generally refer to small-volume, manually regenerated, portable water softeners, or to water conditioners that use cartridges rather than ion-exchange technology (see “Salt Free Water Softeners”).

Some single tank and most twin-tank ion-exchange water softener systems operate on non-electric timers and water pressure alone.

The advantages of a non-electric system are that there is no need to have a power point close to where the system is to be installed, and that a power cut will not affect the operation of the system. A disadvantage is that the system is unable to provide information on its status because it is not equipped with a digital electronic read-out.

Single versus twin tank

Twin-tank water softener systems have been used in commercial applications for some time and are now becoming more popular in domestic households. The twin-tank system has only one brine tank that is shared between two ion-exchange tanks, hence the ‘twin-tank’ label.

The twin-tank system allows the flow of softened water to continue even during the regeneration cycle by alternating between ion-exchange tanks. So when one ion-exchange tank requires regeneration, the other will be available to soften water, and vice versa.

With a single-tank system, hard water will bypass the ion-exchange tank during the regeneration cycle. If a household never uses water during the early morning hours, it might be possible to set the regeneration time of a single-tank water softener system to those hours, so that no ‘hard’ water enters the system. Marketers of twin-tank systems argue that a single-tank system might run out of capacity earlier in the day, thus allowing hard water into the system before regeneration takes place, and that if water is used during the regeneration cycle, it will be hard water that bypasses the ion-exchange tank.

Twin-tank water softener systems often rely on a mechanical timer and water pressure alone, with no electric supply needed, but with no electronic read-out available.

Twin-tank systems obviously have a higher initial cost, and require more space to install. They were designed for commercial applications where water may be required at any time of day or night.

Anyone looking to buy a water softener system needs to decide for themselves whether the extra cost of a twin-tank system is justified by the amount of hard water that may enter their household water system during a regeneration cycle, and whether they have the space required for such a system.

Salt Free Water Softeners

Since salt-based ion-exchange water softeners introduce sodium into the water, these systems are not suitable for people who have been placed on a low-sodium diet for health reasons. In addition, since most wastewater treatment works are not designed to remove salts from water, some municipalities legislate against the installation of salt-based water softener systems.

For these reasons, ‘salt-free’ water softeners are being increasingly promoted, and there are a growing number of ‘salt-free water softeners’ on the market today, using various methods such as chelation, nucleation-assisted crystallization (NAC/TAC), and electromagnetic pulses. Technically, salt-free water hardness treatment is considered ‘conditioning’ rather than ‘softening’, since the chemicals that cause water scale remain in the water, but their scale-forming potential is vastly reduced. Water conditioning may result in a form of ‘soft scale’ that does not bind as strongly to surfaces as ‘hard scale’ and can easily be removed, or will gradually loosen and be flushed out the system over time.

The effectiveness of each method varies, and according to a comparison of methods including NAC/TAC and electromagnetic pulsing undertaken by the Arizona State University in 2010/2011, and an evaluation of the chelation method done by Battelle Institute in 2011/2012, chelation is the most effective process, followed by NAC/TAC technology and finally electromagnetic pulsing. However, it must be kept in mind that the tests on the chelation process and the TAC/NAC process were done by different laboratories using differing methods, and that both processes prevented over 88% of scale formation. Electromagnetic pulsing has been shown to reduce scale formation by approximately 53% and its effects to last for approximately 200 hours.

There are differing opinions about the extent to which water conditioning reduces soap scum and allows soap and detergents to produce foam. Most user reviews appear to indicate that conditioned water does improve the production of soap suds and foaming when compared to untreated water.

Clearly, then, when looking at ‘salt-free water softeners’, one needs to ensure that the unit is produced by a reputable manufacturer who has reliable proof of their system’s effectiveness and efficiency.

In cases where there is a high degree of water hardness present, the effectiveness of salt-free water conditioners may be such that a salt-based ion-exchange system would be more effective.

Water Softener Brands

Buyers are confronted by a wide variety of brands and types of water softeners these days as more dealers enter the market. It is wisest to choose a well-known, reputable brand for your household water softening needs, as their technology will have been tried and tested.

Drinking water from fountain

Some reliable brands include the following:

For salt-based ion-exchange water softeners

For portable salt-based ion-exchange water softener

For chelation type salt-free water conditioners/softeners

For NAC/TAC-type salt-free water conditioners/softeners

For electromagnetic descalers/softeners

Installation and Common Problems

Water Softener Installation

The easiest system to install, as long as there is a power source nearby, is the electromagnetic de-scaler, which requires no plumbing interventions. Simply wind the two wires around the incoming cold water pipe as indicated in the instructions and attach the control box to the wall, plug in the system and away it goes!

Salt-free water softeners, or water conditioners, that use replaceable cartridges are generally the next easiest units for installation. Simply close the water supply and cut a section out of the water supply pipe equal to the width between the inlet and outlet of the ‘head’ of the unit and connect it into the water line.

Ion-exchange water softeners can be more challenging to install, often requiring a nearby power socket and drain point, as well as pipe elbows and extensions. Note also that not all the required fittings are necessarily shipped with the system, so you may need to purchase additional fittings.

For anyone without a working knowledge of plumbing, it is advisable to consult a professional installer or plumber.​

Common Problems & Solutions

Water softeners are generally easy to use and require only basic routine maintenance such as regular salt addition and periodic cleaning, but every now and then a problem may occur, that needs special attention.

Low water pressure: A drop in water pressure at your faucets is a sure sign that the cartridge of your salt-free water softener/conditioner is in need of replacement.

Water not being softened: in the case of a salt-based ion-exchange water softener, this can be a result of one of several causes. Firstly check that the power to the water softener is still present and that the settings are correct. If the controls are operating correctly, then the problem can be caused by one of the following:

Blockages: blockages can occur in the system and cause the water softener to stop working effectively. A blockage in the brine line between the brine tank and the resin tank is the most common cause and can be remedied by flushing this line with water. At the same time, the condition of the injector and screen should be checked. They should be cleaned or replaced if clogged. Also check the brine line for cracks and leaks and replace the tube if any are found. If you are uncertain about what to do, consult your user manual or contact a supplier for assistance.

Salt-bridging: salt-bridging is a condition where a solid layer or crust of salt forms above the water line and prevents the salt from being drawn into the resin tank. This is usually caused by over-filling of the brine tank with salt. The solution is to clean all the salt out of the brine tank and refill only to the level specified in the user manual. Add some warm water and leave it to dissolve the salt for about 4 hours then initiate a backwash and regeneration cycle to get the system in balance again. You may need to repeat the cycles for two to three days before the system works efficiently again.

Resin beads: If small plastic particles are noticed in the water supply, for example, in the water coming out of a faucet, it means that there is a problem in the resin tank. This can be caused by relatively high levels of chlorine in the water supply, which cause the plastic parts to deteriorate and break up, reducing the efficiency of the water softener. The resin beads in the resin tank should have a life span of ten to fifteen years, so if they start to break up within a shorter period, then there may be a problem with the system.

Chlorine in the water can cause the manifold or filter at the bottom of the water softener tank to become brittle and crack, allowing resin beads to escape, or it can cause the beads themselves to break up and fit through the filter. If it is the former, the manifold can be replaced fairly easily, otherwise, the resin beads themselves need to be replaced. 10% cross-link resin has a higher tolerance to chlorine than standard 8% cross-link resin, so it would be worth ensuring that your water softener is supplied with this resin if you live in an urban area where the water is chlorinated.

For reliable performance, use salt pellets rather than rock salt in your brine tank, as the latter may contain contaminants. Also, have a professional check and undertake routine maintenance on your water softener system once a year for longer enjoyment of soft water in your home.

Tips for Water Softener Maintenance to Keeping It Healthy

Frequently Asked Questions

What is hard water?

“Hard water” occurs wherever the water source flows through limestone rock layers. The water dissolves some of the chemicals found in limestone, mainly calcium, and the calcium ions recombine when the water is heated to form limestone crystals, forming the so-called ‘lime-scale’ characteristic of hard water.​
Water is considered ‘hard’ when it contains 10.5 grains per gallon (gpg), which is approximately 180ppm or more of hardness-causing minerals such as calcium and magnesium.​

These minerals, in ion form, combine with water and carbon dioxide when the water is heated, to form crystals of calcium carbonate or magnesium carbonate on heated surfaces. This layer of crystals – called scale or lime-scale – builds up progressively on surfaces in water pipes, water fittings, and water heating appliances, eventually restricting water flow and heating capacity.​

In addition, the hardness minerals will combine with chemicals found in soap and detergents to form a soap ‘scum’ which prevents foam and soap suds from forming and inhibits the cleaning effect of these items.
In order to determine the hardness of your household water supply, there are usually a number of options available. If you obtain your water from a utility company, enquire at their offices or online to find out if they publish their water hardness results.

If not, you can either purchase a home water hardness test kit or engage a water quality professional to test your water hardness for you.​
Remember that it is essential to know the hardness of your water supply, as well as the levels of other minerals and chemicals, in order to determine the most appropriate water softener treatment system for your home.

What is hard water vs soft water?

The US Geological Survey (USGS) classifies water:

– with up to 3.5gpg of hardness minerals as ‘soft’ water
– 3.56 thru 7.01gpg as ‘moderately hard’
– 7.06 thru 10.51gpg as ‘hard’
– 10.57gpg or more as ‘very hard’ water.

In terms of ppm or mg/l that equates to:

– less than 60 for ‘soft’ water
– 60-120 for ‘moderately hard’
– 121-180 as ‘hard’
– above 180 as ‘very hard’ water.

What is scale?

Scale, or lime-scale, is the hard white or cream-color layer that builds up in water pipes, on water fixtures such as showerheads, and in water heaters and kettles in areas where the water supply is ‘hard’, or calcium-rich. It is formed when water containing high levels of calcium or magnesium is heated, thereby increasing the amount of carbon dioxide that is released, leading to the formation of layers of calcium carbonate crystals on heated surfaces.

This scale builds up on heating elements, partially insulating them from the water they are supposed to be heating. More energy is thus required to heat the same amount of water, leading to inefficiencies and increased heating costs. Scale can build up in water pipes and water fittings such as faucets and showerheads, restricting water flow with the associated nuisance and cost of having clean water fittings and replace pipes.

What is regeneration?

Regeneration is a process used in salt-based ion-exchange water softeners to restore the water softening capacity of the system after it has treated the amount of hard water for which it is designed. The process of water softening relies on a bed of small food-grade resin beads that lie in the bottom of the ion-exchange tank, and through which the hard water must pass.

The resin beads that do the actual ‘softening’ are impregnated with sodium ions which are used to replace the calcium and magnesium ions in the ‘hard’ water to prevent them from forming calcium carbonate or calcite particles that adhere to surfaces in the water pipes, fittings, and appliances to form performance-draining scale. Once all the sodium ions available in the resin beads have been used, the resin becomes ineffective and needs to be ‘regenerated’.​

​This is achieved by soaking the resin beads in a strong salt solution or ‘brine’ that is drawn from the brine tank of the system. The sodium from the salt in the solution displaces the calcium and magnesium ions that have been removed from the water during the previous water softening session, and the used solution if flushed down the drain.

This process is repeated several times until all the resin beads have been ‘regenerated’ with sodium ions, and the resin bed is again ready to soften incoming hard water.

What are the benefits of softened water?

Some of the benefits of softened water are:

– Reduction in servicing and maintenance costs of your water-use appliances such as kettles, faucets, shower-heads, and water-heaters;
– Reduction of energy and household fuel costs by improving the efficiency of water heating elements;
– Removal of existing lime-scale deposits in water pipes and appliances, improving performance and water pressure;
– Cost savings on the soap, shampoo, and detergents by improving their ability to lather and clean;
– Elimination of soap scum, improving stain removal from clothing;
– Kinder to your skin and hair.

Is softened water safe to drink?

The amount of sodium absorbed into softened water during the ion-exchange process will be roughly half that of the hardness of the water. Thus, water that has a hardness of 10 gpg will increase its sodium content by approximately 5 grains, or 5 x 17.1ppm = 85.5ppm of sodium per gallon of water consumed.
The UK Drinking Water Inspectorate limit for sodium content in safe drinking water is 200ppm, so this is well below the recommended limit. In comparison, it is estimated that there is 4 to 5 times more salt in a glass of milk than in a glass of softened water.

In areas of very hard water, however, softened water should not be used for the preparation of baby’s milk from formula.
Find here more basic information about the quality of drinking water in the US. 

How do I calculate the size of the water softener I need?

The basic calculation for the water softening requirement of a household is the hardness of the water in gpg multiplied by the average volume of water consumed per day in gallons. This will give the daily water softening requirement in grains. Since it is recommended that a water softener regenerates at least once per week, the daily requirement is then multiplied by seven to give the recommended capacity.

So if your water hardness, as measured or provided by the local water authority, is 10gpg and your household uses on average 250 gallons of water per day, your water softener should have a capacity of around 2500 grains x 7 days = 17,500grains.

Bear in mind though, that the rating of a water softener is based on laboratory condition tests, not real-world situations, so it may be wise to ensure that the rating of the water softener you buy has additional capacity above what your calculation suggests.​

What is a grain of water hardness?

A grain is equivalent to 1/700th of a pound and is equal to 17.118 parts per million (ppm) or milligrams per liter (mg/l). In the context of water hardness, it is a measurement of the presence of calcium and magnesium in the water supply, usually termed grains per gallon or gpg.

Note that each 1ppm of iron present in the water is equivalent to 3 grains of water hardness.

How much salt should my water softener use?

The average use is approximately 6 to 8 lbs of salt per 1 cu. ft. of resin per regeneration at an economical 24,000-grain softening capacity. 1 cubic foot of standard resin is rated to treat 32,000 grains of hardness, but will effectively soften 24,000 grains of water hardness per cycle.

How often do I need to replace the salt in my water softener?

You should check the level of salt in your water softener at least once per month, but more frequently while you are getting used to your new water softener. It is recommended that the level of salt should not be allowed to drop lower than 3” to 4” (7.5 to 10cm) above the water level in the brine tank.

Can I use potassium chloride in my water softener instead of salt?

Yes, potassium chloride is an acceptable substitute for salt in most salt-based ion-exchange water softeners. Although the use of potassium chloride will reduce the amount of sodium in the softened water, states that legislate against water softeners on the basis of salt contamination also view potassium chloride as a form of salt. In addition, potassium chloride is substantially more expensive than standard salt, so one must be sure to evaluate all options before deciding on the use of potassium chloride.

If a member of your household is on a low sodium diet for health purposes, it is advisable to consult a medical practitioner about the use of either sodium or potassium-based water softener.
In areas of moderately hard water, a salt-free water conditioner may be a viable alternative.

What are the characteristics of different types of resin beads?

– Resin beads are designed for standard water softening, chlorinated water softening, and iron-containing water
– The standard 8% cross-link resin beads will treat 32,000 grains of hardness per sq. ft of resin.10% cross-link chlorine resistant resin will give 30-60% longer life in chlorinated water
– Fine mesh resin is designed for well water containing ‘clear water’ iron or ferrous iron – it has twice the iron-removing capacity as cross-link resin (8ppm v 4ppm)

Consult your local water softener dealer as to which type of resin you should use in your water softener.

When do I need to replace the resin beads in my water softener?

Resin beads generally last 15 years if the water softener is well maintained. In the presence of chlorinated water, standard beads will generally not last longer than ten years.

If you see small fragments of resin beads appearing in your softened water, then your resin beads are breaking down and may need to be replaced. Open the ion-exchange tank and feel the beads for firmness. If they are mushy or broken then they need to be replaced.

When do I need to use gravel in my water softener?

A gravel bed will reduce the chances of ‘channeling’ in the resin bed, whereby hard water flows through openings between the resin beads without undergoing the ion-exchange softening process.

Every water softener supplier will have a different opinion on whether a gravel bed is necessary, and most household systems are sold without gravel.
Generally, gravel is used with larger capacity systems of 2cu.ft. (64,000 grains) or more.

Final Thoughts

With such a wide variety of options available, choosing the right water softener for your home can be a bewildering experience.

Remember that a reliable water testing kit or service provider is essential in determining the level of hardness in your water supply, on which you will need to base the size of system you require.

A rule of thumb for water usage is 75 gallons (284 liters) per person per day.

Always go for a larger capacity system than your calculation, to provide for times of extra water usage, such as when friends or family visit, and to allow for extra softening efficiency.

Handful of clear water

If you want to avoid a salt-based water softener because of a low-sodium diet, you can either use potassium chloride salt in an ion-exchange system, or opt for a salt-free water conditioner.

Both hard and soft water have health benefits, so whether you choose the latest, largest water softener available, or can only afford an entry-level water conditioner or de-scaler, you will still be a winner.

De-scaling will save you costs in fuel and cleaning materials, water softening will give you the added benefit of a silkier feel to your household water.

We trust that the information we have given you will help you to choose the one that best suits your circumstances.

Whatever you choose, go ahead and enjoy your home’s new water.

Curtis is the founder and owner of softeningwater.com. He is the lead guy concerning all the water-softening accessories in this site's guides and reviews. If he is not writing a reviews, guides or any other useful tips, you will find him testing them to find out their suitability. He is passionate about softening water. You will find him extremely helpful and always willing to educate the general populace all there is concerning water and its effects on their health and appliances.