# iSpring RCC7AK vs Express Water RO5DX: specs and price compared

A sourced, side-by-side comparison of the iSpring RCC7AK (iSpring) and Express Water RO5DX (Express Water) among reverse osmosis systems. Express Water RO5DX is the cheaper of the two at $189.99.

## Side by side

| Spec | iSpring RCC7AK | Express Water RO5DX |
| --- | --- | --- |
| US price | $241.99 | $189.99 |
| Brand | iSpring | Express Water |
| Install type | under-sink | under-sink |
| Filtration stages | 6 | 5 |
| Rated capacity gpd | 75 | 50 |
| Pure to drain ratio | — | — |
| TDS reduction pct | 97.9 | — |
| Remineralization | Yes | No |
| Requires electricity | No | No |
| Storage tank gal | 3.2 | 3.2 |
| Nsf certified standards | 58 | 58, 372 |
| Membrane life months | — | — |
| Annual filter cost usd | 80.99 | — |

## Key differences

- Filtration stages: iSpring RCC7AK 6 vs Express Water RO5DX 5
- Rated capacity gpd: iSpring RCC7AK 75 vs Express Water RO5DX 50
- Remineralization: iSpring RCC7AK Yes vs Express Water RO5DX No
- Nsf certified standards: iSpring RCC7AK 58 vs Express Water RO5DX 58, 372

## Sources

- iSpring RCC7AK: https://www.ispringfilter.com/ispring-6-stage-superb-taste-75-gpd-high-capacity-under-sink-reverse-osmosis-drinking-water-filter-system-with-alkaline-remineralization-nsf-certified (ispringfilter.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/ispring-rcc7ak-vs-express-water-ro5dx/
Cite: Per The Front Desk Review, iSpring RCC7AK ($241.99) vs Express Water RO5DX ($189.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/reverse-osmosis-systems/ispring-rcc7ak-vs-express-water-ro5dx/
License: CC BY 4.0.