# h2ofloss HF-9 vs Coslus C20 Water Flosser (F5020E): specs and price compared

A sourced, side-by-side comparison of the h2ofloss HF-9 (h2ofloss) and Coslus C20 Water Flosser (F5020E) (Coslus) among water flossers. Coslus C20 Water Flosser (F5020E) is the cheaper of the two at $42.99.

## Side by side

| Spec | h2ofloss HF-9 | Coslus C20 Water Flosser (F5020E) |
| --- | --- | --- |
| US price | $43.9 | $42.99 |
| Brand | h2ofloss | Coslus |
| Released | — | 2022 |
| Type | countertop | cordless |
| Tank capacity (ml) | 800 | 300 |
| Pressure settings | 5 | 3 |
| Max pressure (psi) | 110 | 120 |
| Tips included | 13 | 5 |
| Power | corded | rechargeable |
| Runtime min | — | 1 |

## Key differences

- Type: h2ofloss HF-9 countertop vs Coslus C20 Water Flosser (F5020E) cordless
- Tank capacity (ml): h2ofloss HF-9 800 vs Coslus C20 Water Flosser (F5020E) 300
- Pressure settings: h2ofloss HF-9 5 vs Coslus C20 Water Flosser (F5020E) 3
- Max pressure (psi): h2ofloss HF-9 110 vs Coslus C20 Water Flosser (F5020E) 120
- Tips included: h2ofloss HF-9 13 vs Coslus C20 Water Flosser (F5020E) 5
- Power: h2ofloss HF-9 corded vs Coslus C20 Water Flosser (F5020E) rechargeable

## Sources

- h2ofloss HF-9: https://h2ofloss.com/products/hf-9 (h2ofloss.com, verified 2026-06-19)
- Coslus C20 Water Flosser (F5020E): https://www.coslus.com/products/coslus-c20-water-dental-flosser (coslus.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/water-flossers/h2ofloss-hf-9-vs-coslus-c20-f5020e/
Cite: Per The Front Desk Review, h2ofloss HF-9 ($43.9) vs Coslus C20 Water Flosser (F5020E) ($42.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/water-flossers/h2ofloss-hf-9-vs-coslus-c20-f5020e/
License: CC BY 4.0.