Rheem · Updated June 2026
Rheem Preferred Plus 42,000 Grain Water Softener (RHS42): price & specs
The Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) costs $549, #4 cheapest of 18 water softeners (median $630). It earns a Platinum Deskmark — 94/100 pay-blind standing, #1 of 19 in class.
Verified Jun 27, 2026 · figures linked to their source in the table below
Rheem Preferred Plus 42,000 Grain Water Softener (RHS42). Every price and spec below is linked to its source and dated — no guesses.
Source: rheemwatertreatment.com verified ✓ corroborated verify in ledger
Is the Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) a good buy?
At $549, the Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) is #4 cheapest of the 18 water softeners we track, where the median is $630. On the spec sheet, its flow rate gpm of 9.9 is the lowest of the 7, its tank warranty years of 10 is the highest of the 12, and its grain capacity of 42.4 is above the median of the 18.
Specifications
| Price (US) | $549 $549 at Home Depot (some listings show $589; price varies by location). |
|---|---|
| Brand | Rheem |
| Released | — |
| Grain capacity | 42.4 |
| System type | ion-exchange |
| Flow rate gpm | 9.9 |
| Salt efficiency lbs per kgrains | — |
| Iron removal ppm | 11 |
| Nsf certifications | — |
| Smart app control | No |
| Tank warranty years | 10 |
| Msrp usd | 549 |
Source: rheemwatertreatment.com (verified 2026-06-26) · corroborated by homedepot.com. Rheem manufacturer page confirms 42,000 grain capacity (42,400 at rated salt dose), 9.9 GPM service flow, 11 ppm iron removal, no WiFi, warranty 1yr parts/3yr electronics/10yr tanks. Home Depot search results confirm $549 price point. Same resin (1.20 cu ft) and salt efficiency (5,010 @ 2.5 lbs) as WiFi model RHW42.
Is the Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) worth it vs cheaper water softeners?
Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) against its closest cheaper and pricier water softeners on the specs that matter — every value sourced. See all 18 ranked →
| Product | Price | Grain capacity | System type | Flow rate gpm | Iron removal ppm | Smart app control |
|---|---|---|---|---|---|---|
| Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) this | $549 | 42.4 | ion-exchange | 9.9 | 11 | No |
| WaterBoss 700 22,000 Grain Water Softener | $529.99 | 22 | ion-exchange | 16 | 10 | No |
| GE 40,000 Grain Water Softener (GXSH40V) | $569 | 40 | ion-exchange | — | — | Yes |
Frequently asked questions
How much does the Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) cost?
The Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) has a US price of $549 ($549 at Home Depot (some listings show $589; price varies by location).), as of 2026-06-26.
How does the Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) compare on price?
At $549, the Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) is #4 cheapest of the 18 water softeners we track, where the median is $630.
What are the Rheem Preferred Plus 42,000 Grain Water Softener (RHS42)'s key specs?
Rheem Preferred Plus 42,000 Grain Water Softener (RHS42) (Rheem): grainCapacity 42.4, systemType ion-exchange, flowRateGpm 9.9, ironRemovalPpm 11, smartAppControl No. Full sourced spec sheet verified 2026-06-26.
Similar water softeners
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A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) -
WaterBoss 700 22,000 Grain Water Softener -
GE 40,000 Grain Water Softener (GXSH40V) -
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Morton M45C 45,000 Grain Wi-Fi Water Softener -
Whirlpool WHES40E 40,000 Grain Water Softener -
Aquasure Harmony Series 48,000 Grain Digital Metered Water Softener (AS-HS48D) -
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GE 30,000 Grain Water Softener (GXSF30V) -
A.O. Smith 45,000 Grain Smart Water Softener (AO-WH-SOFT-450T) -
Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) -
Whirlpool WHES30E 30,000 Grain Water Softener
All water softeners ranked → · Open data & methodology · Queryable via MCP
Compare with
Cheaper water softeners
Step up
- GE 40,000 Grain Water Softener (GXSH40V) $569
- WaterBoss 900 36,400 Grain Water Softener $580
- Morton M45C 45,000 Grain Wi-Fi Water Softener $622.99
- Whirlpool WHES40E 40,000 Grain Water Softener $629.99
- Aquasure Harmony Series 48,000 Grain Digital Metered Water Softener (AS-HS48D) $629.99
- A.O. Smith 45,000 Grain Smart Water Softener (AO-WH-SOFT-450T) $649