Best Home Water Softener Systems
Of the best home water softener systems we compared, the Aquasana SimplySoft 40K suits the most houses: a cabinet softener with high flow and resin and salt in one box. Below are our top three home water softener systems, a tool to read your hardness strip, and a calculator that tells you what size to buy. The full ranking lives on our best water softener page.
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Best home water softener: the top 3
The best water softener for home use depends on space and water. These three best water softeners for home cover most city houses. Each is a complete home water softening system (resin, brine storage and a metered control valve) that a handy owner can install:
- 1
Aquasana SimplySoft 40K
Best overall
Why it's here: Only softener here certified to NSF/ANSI 44; highest rated flow among cabinet units. A single-cabinet salt softener with the highest maker-rated flow among the cabinet units we compared, and the only pick independently certified (by IAPMO) to NSF/ANSI 44 for hardness reduction.
Grain capacity 40,000 grains Max flow rate 11.02 gpm Max hardness 200 gpg (compensated) Sized for up to 5 people, 4 bathrooms* Warranty 5/10-year limited * From the seller's Amazon listing; not yet confirmed by the manufacturer.
Good
- Cabinet design keeps resin and salt in one box, so it fits beside a water heater
- Listing states metered mode uses less salt and water than timed regeneration
- Rated on the listing for both city and well water
Not so good
- Pre-filter is sold separately
- In our own use, setup guidance was thin and support didn't fully answer technical questions
- Standard 8% crosslink resin is less tolerant of chlorine than the 10% resin in the Fleck system
- Fewer buyer reports on Amazon than the Aquasure or Fleck systems
Skip it if: Wells with iron or sediment, unless you add a pre-filter; very large homes that need more than 40,000 grains between regenerations.
- 2
AFWFilters Fleck 5600SXT 48K
Best serviceable valve · by AFWFilters (Fleck valve)
Why it's here: Most serviceable valve; chlorine-tolerant 10% resin. The classic two-tank setup: a Fleck 5600SXT metered valve on a 10 x 54 in resin tank with 10% crosslink resin and a large separate brine tank.
Grain capacity 48,000 grains* Max flow rate 14 gpm* Control valve Fleck 5600SXT metered* Warranty 5 years* * From the seller's Amazon listing; not yet confirmed by the manufacturer.
Good
- Fleck 5600SXT valves are sold through many dealers, so parts and service guides are easy to find
- 10% crosslink resin is more tolerant of chlorinated city water than standard 8% resin
- Separate brine tank holds a lot of salt
Not so good
- Two tanks take more floor space than a cabinet unit
- In our install, valve programming needed outside guidance and support callbacks took about a day
- No printed install guide in the box, and the tank label does not show grain capacity
Skip it if: Small closets, or anyone who wants Wi-Fi alerts and app control.
- 3
Aquasure Harmony 48K
Best value · by Aquasure
Why it's here: Most capacity per dollar with a pre-filter included. A 48,000-grain two-tank softener with a digital metered head and a sediment/carbon pre-filter in the box, at the lowest price band among the 48K systems.
Grain capacity 48,000 grains Max flow rate 12 gpm* Sized for 4-5 bathrooms, up to 5-6 people Control valve digital metered* * From the seller's Amazon listing; not yet confirmed by the manufacturer.
Good
- Pre-filter included, which most rivals sell separately
- Metered digital head with an adjustable regeneration interval
- In our two-adult home: under 80 lb of salt in six months
Not so good
- Uses its own control head rather than a widely stocked Fleck valve
- No third-party certification named on the listing
- Our calculated regeneration setting was too optimistic; we had to adjust it
Skip it if: Anyone who wants a valve any local plumber already knows, or a certified system.
Browse by type: the best water softener home owners on wells pick is different — see water softeners for well water, salt-free water softeners or what a water softener costs. New to this? Read the benefits of a water softener system and our water softener FAQ. By brand: Aquasure, Kenmore, Fleck-valve systems and all brands.
Best water softener systems for home, by type
Every residential water softener we rank treats the whole house. Start from your water source and what you want to change:
- Salt-based softenersThe full ranked list for city and well water
Well waterIron limits, sediment and very hard water
Salt-freeScale control with no salt or drain
Softener + filtrationSoft water and better taste
Shower filtersWhat they do (and don't)
Salt and suppliesPellets, potassium, cleaners, test kits
Whole home water softener vs point-of-use
The best whole home water softener is still a point-of-entry unit. A whole home water softener treats every tap from where the main line enters. Point-of-use units (shower filters, under-sink cartridges) only treat one outlet and don't stop scale in your water heater, which is where hard water costs the most. For a house, whole-home is the right answer.
Read your hardness test strip
How to read this: dip a hardness strip for a second, wait 15 seconds, then tap the pad colour that matches, or type the number your kit gives you.
Pick a pad or type a number to see your hardness class.
Which size water softener system for home?
Picking the best water softener system for home use starts with size. Enter your household and hardness:
Water softener size calculator
How to read this: we multiply daily water use by your hardness (plus iron), then by the days between regenerations, and add 25% headroom.
4 people × 75 gal × 12 gpg = 3,600 grains a day. Over 7 days with headroom you need about 31,500 grains, so look for a 32,000-grain softener.
Ranked picks with enough capacity: Kenmore 350 (32,000), Aquasure Harmony Lite 34K (34,000), GE Smart Water Softener 35K (35,000), Aquasana SimplySoft 40K (40,000).
Assumptions: 75 gallons per person per day; each ppm of clear-water iron counts as 4 gpg of hardness.
Questions people ask
- What is the best water softener for a home?
- For most city homes, the Aquasana SimplySoft 40K; on a private well, start with our well water picks.
- What's the best house water softener for a small home?
- For one or two bathrooms, a compact 24,000–32,000 grain cabinet unit is enough; our best house water softener for small homes is in the full ranking.
- Is the best in home water softener system installed inside or outside?
- Inside where possible: most softeners must be protected from freezing and direct sun. If it must go outside, use an insulated enclosure.
- Do I need a water softener?
- Test first. Below about 3.5 gpg (60 ppm) water is soft; above about 7 gpg (120 ppm) a softener usually pays for itself in scale and soap savings. White crust on faucets, spotty glasses and a water heater that pops or rumbles are the usual signs; the benefits page shows what changes at each hardness level.