Compare Water Softeners

Closely matched water softeners side by side, 75 pairs in all. Each pair is scored the same way, with the independent tests and specs that separate them. See the full ranking.

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FirstChoose a product…AFWFilters Fleck 5600SXT 32K – $785Aquasure Harmony 32K – $523.29DuraWater Fleck 5600SXT 32K – $751Kenmore 350 – $621.29Rheem Preferred RHS32 – $489SoftPro Elite 32,000 Grain – $1,159SpringWell SS1 – $1,512Tier1 Essential 32,000 Grain – $509WaterBoss 700 – $580.18Whirlpool WHES30 – $469.99AFWFilters Fleck 5600SXT 48K – $804.99Aquasana SimplySoft 40K – $749Aquasure Harmony 48K – $629.99DuraWater Fleck 5600SXT 48K – $825GE Smart GXSH35W – $699GE Smart GXSH45W – $799iSpring WCS45KG – $966.40Kenmore 420 – $822.77Rheem Preferred Plus RHS42 – $549SoftPro Elite 48,000 Grain – $1,289SpringWell SS4 – $1,680Tier1 Essential 48,000 Grain – $599Whirlpool WHES40 – $579.99Whirlpool WHES48 PRO – $679.99AFWFilters Fleck 5600SXT 64K – $895Aquasana SimplySoft 60K – $1,049Aquasure Harmony 64K – $749.99SoftPro Elite 64,000 Grain – $1,527SpringWell SS+ – $2,520Tier1 Essential 64,000 Grain – $749vsSecondChoose a product…AFWFilters Fleck 5600SXT 32K – $785Aquasure Harmony 32K – $523.29DuraWater Fleck 5600SXT 32K – $751Kenmore 350 – $621.29Rheem Preferred RHS32 – $489SoftPro Elite 32,000 Grain – $1,159SpringWell SS1 – $1,512Tier1 Essential 32,000 Grain – $509WaterBoss 700 – $580.18Whirlpool WHES30 – $469.99AFWFilters Fleck 5600SXT 48K – $804.99Aquasana SimplySoft 40K – $749Aquasure Harmony 48K – $629.99DuraWater Fleck 5600SXT 48K – $825GE Smart GXSH35W – $699GE Smart GXSH45W – $799iSpring WCS45KG – $966.40Kenmore 420 – $822.77Rheem Preferred Plus RHS42 – $549SoftPro Elite 48,000 Grain – $1,289SpringWell SS4 – $1,680Tier1 Essential 48,000 Grain – $599Whirlpool WHES40 – $579.99Whirlpool WHES48 PRO – $679.99AFWFilters Fleck 5600SXT 64K – $895Aquasana SimplySoft 60K – $1,049Aquasure Harmony 64K – $749.99SoftPro Elite 64,000 Grain – $1,527SpringWell SS+ – $2,520Tier1 Essential 64,000 Grain – $749Compare

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• Up to 32,000 grains 24
• 32,001 to 48,000 grains 25
• Over 48,000 grains 12
• Across sizes 14

Best Small Water Softeners

• Rheem Preferred RHS32 vs Whirlpool WHES30
• Aquasure Harmony 32K vs Rheem Preferred RHS32
• Aquasure Harmony 32K vs Whirlpool WHES30
• Rheem Preferred RHS32 vs SoftPro Elite 32,000 Grain
• AFWFilters Fleck 5600SXT 32K vs Rheem Preferred RHS32
• SoftPro Elite 32,000 Grain vs Whirlpool WHES30
• Kenmore 350 vs Rheem Preferred RHS32
• Rheem Preferred RHS32 vs WaterBoss 700
• DuraWater Fleck 5600SXT 32K vs Rheem Preferred RHS32
• WaterBoss 700 vs Whirlpool WHES30
• Rheem Preferred RHS32 vs Tier1 Essential 32,000 Grain
• Aquasure Harmony 32K vs SoftPro Elite 32,000 Grain
• Rheem Preferred RHS32 vs SpringWell SS1
• AFWFilters Fleck 5600SXT 32K vs Aquasure Harmony 32K
• Aquasure Harmony 32K vs Kenmore 350
• AFWFilters Fleck 5600SXT 32K vs SoftPro Elite 32,000 Grain
• Kenmore 350 vs SoftPro Elite 32,000 Grain
• Aquasure Harmony 32K vs WaterBoss 700
• Aquasure Harmony 32K vs DuraWater Fleck 5600SXT 32K
• Aquasure Harmony 32K vs Tier1 Essential 32,000 Grain
• DuraWater Fleck 5600SXT 32K vs SoftPro Elite 32,000 Grain
• SoftPro Elite 32,000 Grain vs Tier1 Essential 32,000 Grain
• Aquasure Harmony 32K vs SpringWell SS1
• SoftPro Elite 32,000 Grain vs SpringWell SS1

Best 40,000 and 48,000 Grain Water Softeners

• Whirlpool WHES40 vs Whirlpool WHES48 PRO
• Aquasana SimplySoft 40K vs Rheem Preferred Plus RHS42
• Rheem Preferred Plus RHS42 vs Whirlpool WHES40
• Aquasure Harmony 48K vs Whirlpool WHES48 PRO
• SoftPro Elite 48,000 Grain vs Whirlpool WHES48 PRO
• AFWFilters Fleck 5600SXT 48K vs Whirlpool WHES48 PRO
• Aquasana SimplySoft 40K vs Whirlpool WHES40
• DuraWater Fleck 5600SXT 48K vs Whirlpool WHES48 PRO
• Tier1 Essential 48,000 Grain vs Whirlpool WHES48 PRO
• Aquasure Harmony 48K vs SoftPro Elite 48,000 Grain
• SpringWell SS4 vs Whirlpool WHES48 PRO
• Kenmore 420 vs Rheem Preferred Plus RHS42
• AFWFilters Fleck 5600SXT 48K vs Aquasure Harmony 48K
• AFWFilters Fleck 5600SXT 48K vs SoftPro Elite 48,000 Grain
• Aquasure Harmony 48K vs DuraWater Fleck 5600SXT 48K
• DuraWater Fleck 5600SXT 48K vs SoftPro Elite 48,000 Grain
• Aquasure Harmony 48K vs Tier1 Essential 48,000 Grain
• iSpring WCS45KG vs Whirlpool WHES48 PRO
• SoftPro Elite 48,000 Grain vs Tier1 Essential 48,000 Grain
• Aquasana SimplySoft 40K vs Kenmore 420
• Kenmore 420 vs Whirlpool WHES40
• Aquasure Harmony 48K vs SpringWell SS4
• SoftPro Elite 48,000 Grain vs SpringWell SS4
• Aquasure Harmony 48K vs iSpring WCS45KG
• iSpring WCS45KG vs SoftPro Elite 48,000 Grain

Best Large Water Softeners

• Aquasure Harmony 64K vs SoftPro Elite 64,000 Grain
• Aquasana SimplySoft 60K vs SoftPro Elite 64,000 Grain
• Aquasana SimplySoft 60K vs Aquasure Harmony 64K
• AFWFilters Fleck 5600SXT 64K vs SoftPro Elite 64,000 Grain
• AFWFilters Fleck 5600SXT 64K vs Aquasure Harmony 64K
• AFWFilters Fleck 5600SXT 64K vs Aquasana SimplySoft 60K
• SoftPro Elite 64,000 Grain vs Tier1 Essential 64,000 Grain
• Aquasure Harmony 64K vs Tier1 Essential 64,000 Grain
• SoftPro Elite 64,000 Grain vs SpringWell SS+
• Aquasure Harmony 64K vs SpringWell SS+
• AFWFilters Fleck 5600SXT 64K vs Tier1 Essential 64,000 Grain
• AFWFilters Fleck 5600SXT 64K vs SpringWell SS+

Across sizes

• Rheem Preferred RHS32 vs Rheem Preferred Plus RHS42
• Whirlpool WHES30 vs Whirlpool WHES40
• Aquasana SimplySoft 40K vs Aquasana SimplySoft 60K
• Aquasure Harmony 32K vs Aquasure Harmony 48K
• Aquasure Harmony 48K vs Aquasure Harmony 64K
• SoftPro Elite 48,000 Grain vs SoftPro Elite 64,000 Grain
• SoftPro Elite 32,000 Grain vs SoftPro Elite 48,000 Grain
• AFWFilters Fleck 5600SXT 32K vs AFWFilters Fleck 5600SXT 48K
• AFWFilters Fleck 5600SXT 48K vs AFWFilters Fleck 5600SXT 64K
• DuraWater Fleck 5600SXT 32K vs DuraWater Fleck 5600SXT 48K
• Tier1 Essential 32,000 Grain vs Tier1 Essential 48,000 Grain
• Kenmore 350 vs Kenmore 420
• Tier1 Essential 48,000 Grain vs Tier1 Essential 64,000 Grain
• SpringWell SS1 vs SpringWell SS4