Waterdrop
Waterdrop G3 P800
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Best Reverse Osmosis Systems · head-to-head
Waterdrop G3 P800 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
$189.99
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Waterdrop G3 P800 | Express Water RO5DX |
|---|---|---|
| US price | — | $189.99 |
| Brand | Waterdrop | Express Water |
| Released | — | — |
| Install type | tankless-under-sink | under-sink |
| Filtration stages | 10 | 5 |
| Rated capacity gpd | 800 | 50 |
| Pure to drain ratio | 3:1 | — |
| TDS reduction pct | — | — |
| Remineralization | No | No |
| Requires electricity | Yes | No |
| Storage tank gal | 0 | 3.2 |
| Nsf certified standards | 42, 53, 58, 372 | 58, 372 |
| Membrane life months | 24 | — |
| Annual filter cost usd | — | — |
Sources — Waterdrop G3 P800: waterdropfilter.com (verified 2026-07-11). Express Water RO5DX: expresswater.com (verified 2026-07-11).
What's the difference between the Waterdrop G3 P800 and Express Water RO5DX?
Where the two actually differ on the specs we track (6 of 11). Matching specs are omitted.
- Install type: Waterdrop G3 P800 tankless-under-sink vs Express Water RO5DX under-sink
- Filtration stages: Waterdrop G3 P800 10 vs Express Water RO5DX 5
- Rated capacity gpd: Waterdrop G3 P800 800 vs Express Water RO5DX 50
- Requires electricity: Waterdrop G3 P800 true vs Express Water RO5DX false
- Storage tank gal: Waterdrop G3 P800 0 vs Express Water RO5DX 3.2
- Nsf certified standards: Waterdrop G3 P800 42, 53, 58, 372 vs Express Water RO5DX 58, 372