Rheem
Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42)
$689
Best Water Softeners · head-to-head
Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) vs WaterBoss 700 22,000 Grain Water Softener
A sourced, side-by-side comparison. WaterBoss 700 22,000 Grain Water Softener is cheaper at $529.99. Every spec and price links to its source.
WaterBoss
WaterBoss 700 22,000 Grain Water Softener
$529.99Cheaper
Which is better: the Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) or WaterBoss 700 22,000 Grain Water Softener?
On the specs we track, they're closely matched. The WaterBoss 700 22,000 Grain Water Softener is the cheaper at $529.99.
See Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) on Amazon See WaterBoss 700 22,000 Grain Water Softener on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) | WaterBoss 700 22,000 Grain Water Softener |
|---|---|---|
| US price | $689 | $529.99 |
| Brand | Rheem | WaterBoss |
| Released | — | — |
| Grain capacity | 42.4 | 22 |
| System type | ion-exchange | ion-exchange |
| Flow rate gpm | 9.9 | 16 |
| Salt efficiency lbs per kgrains | — | — |
| Iron removal ppm | 11 | 10 |
| Nsf certifications | — | — |
| Smart app control | Yes | No |
| Tank warranty years | 10 | 10 |
| Msrp usd | 689 | 529.99 |
Sources — Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42): rheemwatertreatment.com (verified 2026-06-26). WaterBoss 700 22,000 Grain Water Softener: waterboss.com (verified 2026-06-26).
What's the difference between the Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) and WaterBoss 700 22,000 Grain Water Softener?
Where the two actually differ on the specs we track (5 of 9). Matching specs are omitted.
- Grain capacity: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) 42.4 vs WaterBoss 700 22,000 Grain Water Softener 22
- Flow rate gpm: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) 9.9 vs WaterBoss 700 22,000 Grain Water Softener 16
- Iron removal ppm: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) 11 vs WaterBoss 700 22,000 Grain Water Softener 10
- Smart app control: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) true vs WaterBoss 700 22,000 Grain Water Softener false
- Msrp usd: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) 689 vs WaterBoss 700 22,000 Grain Water Softener 529.99