# A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) vs NuvoH2O Manor Salt-Free Water Softener System (DPMB): specs and price compared

A sourced, side-by-side comparison of the A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) (A.O. Smith) and NuvoH2O Manor Salt-Free Water Softener System (DPMB) (NuvoH2O) among water softeners. A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) is the cheaper of the two at $549.

## Side by side

| Spec | A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) | NuvoH2O Manor Salt-Free Water Softener System (DPMB) |
| --- | --- | --- |
| US price | $549 | $999.99 |
| Brand | A.O. Smith | NuvoH2O |
| Grain capacity | 40 | — |
| System type | ion-exchange | salt-free |
| Flow rate gpm | — | — |
| Salt efficiency lbs per kgrains | — | — |
| Iron removal ppm | 10 | — |
| Nsf certifications | — | — |
| Smart app control | No | No |
| Tank warranty years | 10 | 5 |
| Msrp usd | 549 | 1094.99 |

## Key differences

- System type: A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) ion-exchange vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) salt-free
- Tank warranty years: A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) 10 vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) 5
- Msrp usd: A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) 549 vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) 1094.99

## Sources

- A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T): https://www.aosmithatlowes.com/products/water-softeners/ao-wh-soft-400t/ (aosmithatlowes.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/ao-smith-ao-wh-soft-400t-vs-nuvoh2o-manor-dpmb/
Cite: Per The Front Desk Review, A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) ($549) vs NuvoH2O Manor Salt-Free Water Softener System (DPMB) ($999.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/water-softeners/ao-smith-ao-wh-soft-400t-vs-nuvoh2o-manor-dpmb/
License: CC BY 4.0.