WaterBoss
WaterBoss 700 22,000 Grain Water Softener
$529.99Cheaper
Best Water Softeners · head-to-head
WaterBoss 700 22,000 Grain Water Softener vs A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T)
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.
A.O. Smith
A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T)
$549
Which is better: the WaterBoss 700 22,000 Grain Water Softener or A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T)?
On the specs we track, they're closely matched. The WaterBoss 700 22,000 Grain Water Softener is the cheaper at $529.99.
See WaterBoss 700 22,000 Grain Water Softener on Amazon See A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) 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 |  WaterBoss 700 22,000 Grain Water Softener |  A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) |
|---|---|---|
| US price | $529.99 | $549 |
| Brand | WaterBoss | A.O. Smith |
| Released | — | — |
| Grain capacity | 22 | 40 |
| System type | ion-exchange | ion-exchange |
| Flow rate (gpm) | 16 | — |
| Salt efficiency lbs per kgrains | — | — |
| Iron removal (ppm) | 10 | 10 |
| NSF certifications | — | — |
| Smart app control | No | No |
| Tank warranty years | 10 | 10 |
| Msrp (USD) | 529.99 | 549 |
Sources — WaterBoss 700 22,000 Grain Water Softener: waterboss.com (verified 2026-06-26). A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T): aosmithatlowes.com (verified 2026-06-26).
What's the difference between the WaterBoss 700 22,000 Grain Water Softener and A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T)?
Where the two actually differ on the specs we track (2 of 9). Matching specs are omitted.
- Grain capacity: WaterBoss 700 22,000 Grain Water Softener 22 vs A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) 40
- Msrp (USD): WaterBoss 700 22,000 Grain Water Softener 529.99 vs A.O. Smith 40,000 Grain Water Softener (AO-WH-SOFT-400T) 549