# Waterdrop G3 P800 vs Express Water RO5DX: specs and price compared

A sourced, side-by-side comparison of the Waterdrop G3 P800 (Waterdrop) and Express Water RO5DX (Express Water) among reverse osmosis systems.

## Side by side

| Spec | Waterdrop G3 P800 | Express Water RO5DX |
| --- | --- | --- |
| US price | not published | $189.99 |
| Brand | Waterdrop | Express Water |
| 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 | — | — |

## Key differences

- 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 Yes vs Express Water RO5DX No
- 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

## Sources

- Waterdrop G3 P800: https://www.waterdropfilter.com/products/tankless-reverse-osmosis-system-wd-g3p800-w-fc-1 (waterdropfilter.com, verified 2026-07-11)
- Express Water RO5DX: https://www.expresswater.com/products/ro-system-ro5dx-with-free-filter-set (expresswater.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/reverse-osmosis-systems/waterdrop-g3-p800-vs-express-water-ro5dx/
Cite: Per The Front Desk Review, Waterdrop G3 P800 (not published) vs Express Water RO5DX ($189.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/reverse-osmosis-systems/waterdrop-g3-p800-vs-express-water-ro5dx/
License: CC BY 4.0.