It treats limescale. It is not a health device. · review
A 40,000-grain water softener rated to 120 gpg hardness and 10 ppm iron, with a sediment pre-filter.
That figure appears on one listing out of twelve, and it answers a question the other eleven do not even acknowledge.
A grain rating says how much the softener holds. Forty thousand grains, here — the capacity of the resin bed before it must regenerate.
A hardness limit says whether it works on your water at all. Very hard well water can exceed what a resin bed can process in one pass, no matter how large the bed is.
Kenmore publishes 120 gpg. For reference, water above about 10 gpg is considered hard and above 15 very hard; 120 is extreme well water.
Eleven listings on this shelf publish a capacity and leave the limit unsaid — which means anyone with genuinely hard water cannot tell from the page whether the softener will cope.
The other number nobody else gives.
Clear water iron is iron dissolved in water that has not yet met air. It comes out of the faucet looking clean and then stains the bath, the sink and the laundry orange as it oxidizes.
Softener resin removes some of it along with the hardness — and iron fouls resin over time, which is why most makers say nothing about it.
Kenmore publishes 10 ppm, and pairs it with a sediment pre-filter and enhanced iron reduction.
On a well, that is the specification that decides the purchase. One listing in twelve has it.
Flow rate, salt levels, and daily usage in real time.
Most softeners show a salt light. This shows what the house is actually using, which is how you discover a leaking toilet valve or confirm that the sizing was right.
Twenty dollars fifty-one a thousand grains — the most expensive on this shelf, where Aquasure’s 64,000-grain unit is $11.72.
A 3/4 inch valve, where GE and AFWFilters both use 1 inch. Every drop in the house goes through that valve. Kenmore calls it an Ultra Flow Valve and it is probably ample for five people; for a six-bathroom house with two showers and a dishwasher running, the bigger bore is the safer specification. PRO+AQUA is the only listing here that publishes an actual flow rate — 20 GPM.
“Artificial intelligence”, with no number attached. Aquasana publishes 50% less salt and 28% less water. Four makers here describe the same metered-regeneration idea and one of them quantifies it.
Kenmore’s warranty — 1 year full, 3 on electronics, 10 on the tank — is identical in structure to the EcoPure on this shelf, and both listings use the same built-in sediment shield language.
That is a useful way to put a warranty, because it matches how a softener fails: the tank is a plastic vessel and lasts, the electronics are a motor and a board and do not.
Available at around $820.34 on Amazon.com when we checked on October 29, 2026, for delivery to a US address.
Stock and prices on Amazon.com move without notice; the button above opens the live listing.
Prices quoted in this text were read on October 29, 2026. The live price is at the top of the page.
Set against the median of its own shelf on this site — not against the whole bathroom market.
| Resin volume | NOT PUBLISHED. |
|---|---|
| Stated capacity between regenerations | 40,000 grains, sized for 1–5 people — $20.51 per 1,000 grains on October 29, 2026, the highest on this shelf. It is the only softener here that publishes its LIMITS: up to 120 gpg of hardness and up to 10 ppm of clear water iron. |
| Regeneration type | IntelliSoft, stated to use artificial intelligence to learn water use patterns, with a display giving flow rate, salt levels and daily usage in real time. For well water there is a sediment pre-filter and enhanced iron reduction. |
| Connection size | A 3/4 in Ultra Flow Valve, stated to keep pressure strong. A sediment shield is built in. |
| Stated salt consumption | NOT PUBLISHED as a figure. |
| Footprint | 21.5 × 15 in (546 × 381 mm) of floor, 48 in (1,219 mm) tall, described as compact and space-saving, 102.0 lb (46,266 g). No certification is published. Warranty 1 year full, 3 years on the electronics, 10 years on the tank, with up to 5 years of full coverage available. |
| Amazon reference | B00JH3XUNA |
| EAN | 0633815604370 |
They answer two different questions and this is the only listing on this shelf that answers the second. The grain rating — 40,000 here — says how much hardness the resin can hold before regenerating. The hardness limit, 120 grains per gallon, says how hard the incoming water can be before the softener cannot cope at all. Very hard well water can exceed what a resin bed can process in a single pass regardless of its capacity. Eleven listings here publish the capacity and leave the limit unstated, which means buyers on genuinely hard water have no way to tell whether the softener will work.
Iron dissolved in water that has not yet oxidized — the water looks clear from the faucet and then leaves orange stains in the bath and the laundry once air gets to it. Ion exchange resin will remove some of it along with the hardness, but iron fouls resin over time, which is why most softeners stay silent about it. Kenmore publishes a figure, 10 ppm, and pairs it with a sediment pre-filter and what it calls enhanced iron reduction. On a well, that is the specification that decides the purchase, and it appears on exactly one of twelve listings here.
In a large house, possibly. Every drop of water in the building passes through the softener valve, so its size sets the ceiling on flow. GE and AFWFilters on this shelf both use 1 inch connections; PRO+AQUA publishes up to 20 GPM of flow. Kenmore calls its 3/4 inch valve an "Ultra Flow Valve" designed to keep pressure strong, which may well be true for a household of five. For a six-bathroom house where two showers and a dishwasher run at once, the larger valve is the safer specification — and it is the only flow-related number most of this shelf publishes at all.
Same category, nearby prices, between bathroom fittings. What remains is the specifications every one publishes — half empty, a column is no use.
| Model | Price | Resin volume | Stated capacity between regenerations | Regeneration type | Connection size |
|---|---|---|---|---|---|
| Kenmore 420 water softener | $820 | NOT PUBLISHED. | 40,000 grains, sized for 1–5 people — $20.51 per 1,000 grains on October 29, 2026, the highest on this shelf. It is the only softener here that publishes its LIMITS: up to 120 gpg of hardness and up to 10 ppm of clear water iron. | IntelliSoft, stated to use artificial intelligence to learn water use patterns, with a display giving flow rate, salt levels and daily usage in real time. For well water there is a sediment pre-filter and enhanced iron reduction. | A 3/4 in Ultra Flow Valve, stated to keep pressure strong. A sediment shield is built in. |
| AFWFilters 48K Fleck 5600 SXT softener | $805 | 1.5 cu ft of 10% CROSSLINK — THE ONLY RESIN VOLUME AND THE ONLY CROSSLINK FIGURE ON THIS SHELF, and the maker states that 10% crosslink resists chlorine better than standard 8% media. It is the one line on this shelf that answers what the resin actually is. | 48,000 grains — $16.77 per 1,000 grains. | A Fleck 5600SXT valve — the only named industry valve on this shelf, and the only one a plumber could source parts for. | 1 in NPT inlet and outlet, with bypass and drain fittings included — the only published connection size on this shelf. |
| Aquasure Harmony 64,000-grain softener | $750 | NOT PUBLISHED. The tank is fiberglass-lined polyethylene, stated corrosion resistant. | 64,000 grains, sized for 4 or more bathrooms — $11.72 per 1,000 grains, the lowest on this shelf. Against the maker’s own 32,000 model that is +32,000 grains for $226.70. | An automatic digital metered head with a programmable backlit display. | NOT PUBLISHED, and neither is a flow rate. |
| Aquasana SimplySoft 40K softener | $749 | NOT PUBLISHED. The method is ion exchange, stated for city or well water. | 40,000 grains, sized for up to 5 people and 4 bathrooms — $18.73 per 1,000 grains. IAPMO CERTIFIED to NSF/ANSI Standard 44 and to CSA B483.1, which only the two Aquasana units here are. | Metered, on an LCD display. | NOT PUBLISHED, and neither is a flow rate. A pre-filter is RECOMMENDED by the maker but SOLD SEPARATELY, in its installation kit. |
This model is listed on Amazon.com, at ≈ $820 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on October 29, 2026.
A well with iron in it — and anyone whose water is hard enough that most softeners will not say whether they cope
Amazon reports what buyers took in the month before this page was last checked: at least 50.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for bathroom fittings and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
48,000 grain softener · Fleck 5600SXT valve · 10 × 54 in tank, 1.5 cu ft of 10% crosslink resin
A 48,000-grain softener on a Fleck 5600SXT valve with 1.5 cu ft of 10% crosslink resin.
Best for: Anyone who intends to own this for fifteen years and wants to be able to buy parts for it
≈ $805
SimplySoft 60,000 grain · tank and cabinet · for 5+ people and 4+ bathrooms · NSF/ANSI 44 via IAPMO
A 60,000-grain cabinet water softener certified to NSF/ANSI 44, for homes of five or more people.
Best for: A large household that wants certification, published running costs, and a cabinet rather than a tower
≈ $1,049
SimplySoft 40,000 grain · tank and cabinet · up to 5 people and 4 bathrooms · NSF/ANSI 44 via IAPMO
A 40,000-grain cabinet water softener certified to NSF/ANSI 44, using 50% less salt on metered mode.
Best for: A buyer who wants the certification and the running costs in writing, and will pay for both
≈ $749
