A.O. Smith
A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T)
$549Cheaper
Best Water Softeners · head-to-head
A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) vs NuvoH2O Manor Salt-Free Water Softener System (DPMB)
A sourced, side-by-side comparison. A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) is cheaper at $549. Every spec and price links to its source.
NuvoH2O
NuvoH2O Manor Salt-Free Water Softener System (DPMB)
$999.99
Which is better: the A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) or NuvoH2O Manor Salt-Free Water Softener System (DPMB)?
On the specs we track, they're closely matched. The A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) is the cheaper at $549.
See A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) on Amazon See NuvoH2O Manor Salt-Free Water Softener System (DPMB) on Amazon
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| 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 |
| Released | — | — |
| 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 |
Sources — A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T): aosmithatlowes.com (verified 2026-06-26). NuvoH2O Manor Salt-Free Water Softener System (DPMB): purewaterguys.com (verified 2026-06-26).
What's the difference between the A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) and NuvoH2O Manor Salt-Free Water Softener System (DPMB)?
Where the two actually differ on the specs we track (3 of 9). Matching specs are omitted.
- 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