# Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) vs NuvoH2O Manor Salt-Free Water Softener System (DPMB): specs and price compared

A sourced, side-by-side comparison of the Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) (Rheem) and NuvoH2O Manor Salt-Free Water Softener System (DPMB) (NuvoH2O) among water softeners. Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) is the cheaper of the two at $689.

## Side by side

| Spec | Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) | NuvoH2O Manor Salt-Free Water Softener System (DPMB) |
| --- | --- | --- |
| US price | $689 | $999.99 |
| Brand | Rheem | NuvoH2O |
| Grain capacity | 42.4 | — |
| System type | ion-exchange | salt-free |
| Flow rate gpm | 9.9 | — |
| Salt efficiency lbs per kgrains | — | — |
| Iron removal ppm | 11 | — |
| Nsf certifications | — | — |
| Smart app control | Yes | No |
| Tank warranty years | 10 | 5 |
| Msrp usd | 689 | 1094.99 |

## Key differences

- System type: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) ion-exchange vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) salt-free
- Smart app control: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) Yes vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) No
- Tank warranty years: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) 10 vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) 5
- Msrp usd: Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) 689 vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) 1094.99

## Sources

- Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42): https://www.rheemwatertreatment.com/product/preferred-platinum/ (rheemwatertreatment.com, verified 2026-06-26)
- NuvoH2O Manor Salt-Free Water Softener System (DPMB): https://purewaterguys.com/products/nuvo-dpmb-manor-water-softeners (purewaterguys.com, verified 2026-06-26)

Canonical: https://frontdeskreview.com/gear/water-softeners/rheem-rhw42-vs-nuvoh2o-manor-dpmb/
Cite: Per The Front Desk Review, Rheem Preferred Platinum 42,000 Grain Smart Water Softener (RHW42) ($689) vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) ($999.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/water-softeners/rheem-rhw42-vs-nuvoh2o-manor-dpmb/
License: CC BY 4.0.