Is Rheem a good brand for water softeners?

Yes for what it is: a straightforward, big-box demand-initiated softener line, not a premium or dealer-installed system. Rheem's Preferred series uses metered regeneration and Rheem Learning Technology to adapt to household usage, and every model carries a 10-year tank warranty. It won't out-spec a Fleck 5600SXT build or a SpringWell system, but it's a legitimate mid-tier option at a lower price point than most dealer-sold brands.

Where can I actually buy a Rheem water softener?

Exclusively at The Home Depot, in stores and online — Rheem's own product pages direct buyers there and nowhere else. That's a real difference from Watts (sold through plumbing wholesalers) or Fleck-based systems (sold through specialty online retailers like AFW Filters), and it means Rheem is one of the few softener brands you can walk in and pick up the same day.

What's the difference between the RHS42 and the RHW42 Platinum?

Same 42,000-grain capacity and the same underlying Rheem Learning Technology, but the RHW42 Platinum adds WiFi and the iQua app, which shows real-time salt levels, water usage, and lets you shut off water remotely if a leak is detected. The RHS42 uses a blue status light on the unit itself for salt alerts instead of an app. You're paying roughly $100-$150 more for the app and remote monitoring, not more softening capacity.

Does Rheem really use 40% less salt than other softeners?

That figure comes from Rheem's own marketing for the Preferred series' demand-initiated regeneration, which only regenerates based on metered water use rather than a fixed timer — the same efficiency principle behind Fleck's metered valves. We haven't independently verified the exact 40% figure against a specific competitor, but the underlying mechanism (metered vs. timer-based regeneration) is a real and well-documented salt-saving approach, not a marketing-only claim.

Rheem Water Softener Review 2026: Preferred Series Tested

Quick Answer: Rheem builds four water softener models — the entry-level RHS18 (18,000 grain, $374), the RHS32 (32,000 grain, $489, rated for up to 4 people), the RHS42 (42,000 grain, $549), and the WiFi-connected RHW42 Preferred Platinum (42,000 grain, roughly $650-$700) — all sold exclusively through The Home Depot, according to Rheem’s own product pages. Every model uses demand-initiated (metered) regeneration and Rheem’s own Learning Technology to adjust salt and water use to your household’s actual habits, carrying a 10-year tank warranty. The real tradeoff isn’t build quality — it’s that Rheem’s single-retailer distribution means no dealer install, no wholesale-account pricing, and no shopping around for a better price the way you can with a Fleck-based system.

If you’ve shopped for a water heater, you’ve probably seen the Rheem name — the company is one of the largest water-heater manufacturers in the US, and its Preferred series water softeners lean on the same big-box playbook: a fixed lineup, a single retailer, and simple published pricing instead of the quote-based dealer model brands like SpringWell or Kinetico use. That’s the single biggest thing to understand before comparing Rheem against the rest of our best water softener picks.

Rheem Preferred lineup at a glance

Model	Capacity	Best for	Smart features	Price
Rheem RHS18 Preferred Compact	18,000 grain	1-2 people	Blue salt-level status light	$374
Rheem RHS32 Preferred	32,000 grain	Up to 4 people	Blue salt-level status light	$489
Rheem RHS42 Preferred Plus	42,000 grain	4-6 people	Blue salt-level status light	$549
Rheem RHW42 Preferred Platinum	42,000 grain	4-6 people, wants remote monitoring	WiFi + iQua app, remote shutoff	~$650-$700

What the Preferred series actually gets right

According to Rheem’s own product documentation, every Preferred-series unit uses demand-initiated regeneration — it meters actual water passed through the resin bed rather than firing on a fixed clock schedule, the same metering principle behind the Fleck valves in our other brand reviews. Rheem markets this combined with its “Learning Technology” (the system adapts its regeneration schedule to your household’s real usage pattern over time) as using up to 40% less salt than a traditional timer-based softener. All four models also share a 10-year tank warranty and remove ferrous iron along with hardness minerals, which matters if you’re on well water with light iron staining rather than a fully iron-loaded supply.

Rheem RHS32 Preferred 32,000 Grain Water Softener

Best for most households · $489 · 32,000 grain · up to 4 people · demand-initiated regeneration

Blue status light on the cabinet alerts you when salt is running low — no app required.
Rated for households up to 4 people on moderately hard water.
10-year tank warranty and made-in-USA construction.

Check price on Amazon →

Softener salt and resin on time, every time — Amazon Prime ships them free in two days, and you can try it free for 30 days.

Where Rheem falls short: one retailer, no negotiating room

This is the honest catch. Rheem’s own Preferred-series page directs buyers to Home Depot exclusively — there’s no dealer network to shop between, no plumbing-wholesale discount the way Watts moves through Ferguson or SupplyHouse, and no direct-factory pricing the way AFW Filters sells Fleck-based systems. That single-retailer model cuts both ways: pricing is simple and published upfront (a real advantage over quote-based dealer brands), but you can’t negotiate, wait for a competing sale elsewhere, or find an independent installer bundling a better deal. If you want the metered, demand-initiated approach without being tied to one store, our Fleck 5600SXT review covers a comparable system sold through multiple independent retailers.

Rheem RHW42 Preferred Platinum 42,000 Grain Water Softener

Best smart features · ~$650-$700 · 42,000 grain · WiFi + iQua app · remote water shutoff

iQua app shows real-time salt level and water usage from anywhere with WiFi.
Remote shutoff capability can close the water supply if the app detects a leak.
Same 42,000-grain capacity and Learning Technology as the non-WiFi RHS42 — you're paying for the app and monitoring, not more softening power.

Check price on Amazon →

Who should actually buy Rheem

Rheem makes sense for homeowners who already have a Home Depot nearby, want simple published pricing with no quote calls or in-home sales visits, and are comfortable with a straightforward DIY or handyman install rather than a full-service dealer install. The RHW42 Platinum is a reasonable pick if remote salt-level monitoring genuinely matters to you — say, a second home you don’t visit often — since it’s cheaper than most dealer-brand smart softeners like the GE GXSHC40N. It’s a weaker choice for heavy iron or sulfur well water, where a dedicated well-water iron-tolerant system is a better fit, and for anyone who wants a dealer to handle installation and future service calls rather than DIYing it. If you’d rather shop Lowe’s instead of Home Depot, our Whirlpool water softener review and Morton water softener review cover the two comparable big-box alternatives.

The bottom line

The Rheem RHS32 is a solid, no-surprises mid-tier softener — $489, 32,000 grains, demand-initiated regeneration, a 10-year tank warranty — and the whole Preferred lineup benefits from simple, published, one-retailer pricing instead of the quote-based dance most dealer brands run. Step up to the RHW42 Platinum if remote app monitoring is worth roughly $150 more to you. The tradeoff to go in expecting: Home Depot is the only place to buy one, so there’s no shopping around for a discount the way there is with Fleck-based or Watts systems. See our best water softener picks for how Rheem stacks up against the rest of the field.

Last updated September 2, 2026.