Whole-House System
Kenmore 420 Water Softener (40,000-grain)
Certified for hardness · NSF/ANSI 44
Buying guide · softener vs salt-free
Water Softener vs Salt-Free Conditioner
A softener removes hardness. A conditioner only changes how it behaves.
A water softener removes the calcium and magnesium that make water hard, using salt. A salt-free conditioner doesn’t remove them: it changes them into tiny crystals that are less likely to stick as scale. Choose a softener if you want truly soft water; consider a salt-free conditioner if you mainly want less scale and no salt.
The short version
Two different jobs, side by side
Removes hardnessNSF/ANSI 44
Water softener
Takes the hardness minerals out of the water. Uses salt, a drain and power. You get soft water: better lather, no spots, no scale.
- HardnessRemoved
- Spots on glassGreatly reduced
- SaltA bag or two a month
- Drain and powerNeeded
- Water testsSoft
Reduces scaleNo NSF/ANSI standard
Salt-free conditioner
Leaves the minerals in, but changes them into microscopic crystals that tend to flow on through instead of sticking to pipes and heaters. No salt, no drain, usually no power.
- HardnessStill in the water
- Spots on glassOften still
- SaltNone
- Drain and powerUsually none
- Water testsStill hard
How each one works
Removed, or turned into crystals
Salt-free conditionerResults depend on your water. Very hard water, or water with a lot of iron or manganese, can make a conditioner less effective; makers usually list limits for both.TAC
- Hard water inWater flows through a tank of special beads.
- Template-assisted crystallizationMain stageThe bead surface helps the dissolved calcium and magnesium form tiny, stable crystals.
- Crystals flow onThey mostly travel through your pipes instead of building up as scale.
- Still-hard water at the tapThe minerals are still there.
Because the minerals are still in the water, you can still get spots on glass and shower doors, and soap lathers the same as before.
Salt-based softenerIon exchange
- Hard water inWater runs through resin beads.
- Ion exchangeMain stageThe beads swap calcium and magnesium for sodium.
- RegenerationEvery few days it rinses the beads with salty water from a brine tank and flushes the hardness down the drain. You add a bag or two of salt each month.
- Soft water at the tapBetter lather, fewer spots, no scale.
Which should you choose?
Start from what you want to fix
If
You want soft-feeling water, no spots and the most scale protection
Choose a softenerIf
You have no drain nearby, don’t want to carry salt, or limit sodium
Consider a salt-free conditionerIf
Your water is harder than the conditioner maker’s stated limit
A softener is more reliableIf
You rent
Neither is usually allowed without your landlord’s OKCertification and costs
No NSF/ANSI standard certifies a salt-free conditioner as a softener, because it doesn’t remove hardness. Some makers cite an independent scale-reduction test instead, such as Germany’s DVGW W 512; ask to see the report.| Softener | Salt-free conditioner | |
|---|---|---|
| Certification | NSF/ANSI 44 (hardness) | No NSF/ANSI standard; ask for a scale test report |
| Running cost | A bag or two of salt each month | Media replaced every few years |
| Install | May need a plumber | May need a plumber |
Commercial · water softeners we trackWe may earn a commissionAs an Amazon Associate, PurityMap earns from qualifying purchases. At no extra cost to you. Commission never decides which products appear or their order.
Certified water softeners we track
We don’t list salt-free conditioners on this page yet. If you decide on a softener, each card shows whether the model is certified for hardness reduction. Some links are affiliate links: PurityMap may earn from qualifying purchases, at no extra cost to you.
Whole-House System
GE GXSH35W Water Softener (35,000-grain)
Certified for hardness · NSF/ANSI 44
Every product here is listed for its type and what its certification covers, not for what is in your water. We don’t accept paid placement. Affiliate disclosure.
Questions
Common questions
Do salt-free water softeners work?
They don’t soften water; they reduce scale, and results vary with how hard your water is. If you want soft water, a salt-based softener is the option that removes hardness.
Will a salt-free conditioner stop spots on dishes?
Often not fully. The minerals are still in the water, so spots can still form as water dries.
Does a softener add sodium to my water?
Yes, a small amount, more if your water is very hard. If you limit sodium, ask your doctor, use potassium chloride instead of salt, or keep one unsoftened tap for drinking.