AquaTru
AquaTru Classic
$475
Best Reverse Osmosis Systems · head-to-head
AquaTru Classic vs Express Water RO5DX
A sourced, side-by-side comparison. Express Water RO5DX is cheaper at $189.99. Every spec and price links to its source.
Express Water
Express Water RO5DX
$189.99Cheaper
Which is better: the AquaTru Classic or Express Water RO5DX?
On the specs we track, they're closely matched. The Express Water RO5DX is the cheaper at $189.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  AquaTru Classic |  Express Water RO5DX |
|---|---|---|
| US price | $475 | $189.99 |
| Brand | AquaTru | Express Water |
| Released | — | — |
| Install type | countertop | under-sink |
| Filtration stages | 4 | 5 |
| Rated capacity gpd | — | 50 |
| Pure to drain ratio | — | — |
| TDS reduction (%) | — | — |
| Remineralization | No | No |
| Requires electricity | Yes | No |
| Storage tank (gal) | 0.75 | 3.2 |
| NSF certified standards | — | 58, 372 |
| Membrane life months | 24 | — |
| Annual filter cost (USD) | — | — |
Sources — AquaTru Classic: aquatru.com (verified 2026-10-20). Express Water RO5DX: expresswater.com (verified 2026-10-20).
What's the difference between the AquaTru Classic and Express Water RO5DX?
Where the two actually differ on the specs we track (4 of 11). Matching specs are omitted.
- Install type: AquaTru Classic countertop vs Express Water RO5DX under-sink
- Filtration stages: AquaTru Classic 4 vs Express Water RO5DX 5
- Requires electricity: AquaTru Classic true vs Express Water RO5DX false
- Storage tank (gal): AquaTru Classic 0.75 vs Express Water RO5DX 3.2