# Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) vs WaterBoss 700 22,000 Grain Water Softener: specs and price compared

A sourced, side-by-side comparison of the Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) (Rheem) and WaterBoss 700 22,000 Grain Water Softener (WaterBoss) among water softeners. WaterBoss 700 22,000 Grain Water Softener is the cheaper of the two at $529.99.

## Side by side

| 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 |
| 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 |

## Key differences

- 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) Yes vs WaterBoss 700 22,000 Grain Water Softener No
- Msrp usd: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) 689 vs WaterBoss 700 22,000 Grain Water Softener 529.99

## Sources

- Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42): https://www.rheemwatertreatment.com/product/preferred-platinum/ (rheemwatertreatment.com, verified 2026-06-26)
- WaterBoss 700 22,000 Grain Water Softener: https://www.waterboss.com/whole-house-water-softener-model-700/ (waterboss.com, verified 2026-06-26)

Canonical: https://frontdeskreview.com/gear/water-softeners/rheem-rhw42-vs-waterboss-700/
Cite: Per The Front Desk Review, Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) ($689) vs WaterBoss 700 22,000 Grain Water Softener ($529.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/water-softeners/rheem-rhw42-vs-waterboss-700/
License: CC BY 4.0.