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Tap Water Filter – 3-Way Tap & OneZero French Eaux
Filter jugs that need refilling constantly, tap water with a chlorine taste, wanting purified water without overhauling your kitchen plumbing: the French Eaux tap water filter system combines a compact reverse osmosis unit with a dedicated 3-way tap for purified water right at your fingertips, without touching your existing faucet.
Filter jug, tap-mounted filter, or a real filtration system?
When tap water tastes of chlorine or raises concerns about what it contains, the first instinct is often a filter jug. Convenient, but limited: 1.5 to 2 litres at a time, frequent refills, and activated carbon filtration that improves taste without meaningfully removing the more problematic contaminants — nitrates, heavy metals, microplastics.
Filters that screw directly onto an existing tap are a step up, but still limited in flow rate and cartridge lifespan, and typically rely on activated carbon alone.
For genuinely purified water, at a constant flow rate and with no manual refilling, the most effective solution remains a complete system: a reverse osmosis unit installed under the sink, connected to a dedicated tap on the countertop. That's exactly what French Eaux offers with the OneZero and 3-way LED tap combination.
A complete system: under-sink filter + dedicated tap
The OneZero installs under the sink and filters water through reverse osmosis, with no electricity — driven solely by mains water pressure. It reduces up to 99.9% of contaminants: bacteria, viruses, heavy metals, nitrates, pesticides, chlorine and microplastics.
The 3-way LED tap completes the system by dispensing two distinct types of water from a single point: mains water through the main handle, and filtered reverse osmosis water through a separate control. The internal circuits are fully independent, eliminating any risk of cross-contamination between the two.
A practical detail: a maintenance LED set on a 12-month cycle lights up automatically to indicate when it's time to replace the filter cartridges — no more guessing or marking a date on a calendar. The tap is available in black or silver to match your kitchen's style.
The result: purified water available at any time, at a constant flow rate, with no manual refilling or jug to top up — just a single action, exactly like turning on mains water.
OneZero + tap vs filter jug vs tap-mounted filter
| OneZero + 3-Way Tap | Filter jug | Tap-mounted filter | |
|---|---|---|---|
| Filtration | Reverse osmosis, up to 99.9% | Activated carbon | Activated carbon |
| Flow | Continuous, no refilling | 1.5 to 2 L at a time | Limited |
| Cross-contamination | Separate circuits, zero risk | N/A | Depends on setup |
| Maintenance reminder | Automatic 12-month LED | Manual | Manual |
| Installation | Under sink + dedicated tap | None | On existing tap |
| Recurring cost | Low (cartridges every 6-12 months) | High (frequent cartridges) | Moderate |
Technical specifications
OneZero – Under-sink reverse osmosis
| Water type | Ambient osmosis water |
| Production rate | 15 L/h |
| Operating pressure | 1.5 to 6 bar |
| Filter capacity | 7,000 litres |
| Dimensions | 360 × 360 × 150 mm |
| Weight | 8.2 kg |
3-Way LED Tap
| Outputs | Mains water + reverse osmosis water |
| Flow rate | 7.5 L/h |
| Dimensions | W 210 × D 55 × H 325 mm |
| Hole required | 33 mm |
| Colours | Black, Silver |
| Maintenance indicator | LED set on a 12-month cycle |
Discover the OneZero + 3-Way Tap system
Reverse osmosis filtered water, available at any time from a dedicated tap, with zero cross-contamination and an automatic maintenance reminder.
Frequently asked questions
Do I need a special tap to use the OneZero?
A dedicated tap is recommended to dispense the filtered water separately from mains water. The French Eaux 3-way LED tap is designed specifically for this purpose, with fully independent internal circuits.
Why not just use a filter jug?
An activated carbon filter jug improves taste but doesn't effectively remove nitrates, heavy metals or microplastics. It also requires frequent refilling, unlike a reverse osmosis system with a dedicated tap, which delivers purified water continuously.
How do I know when to replace the cartridges?
The 3-way LED tap includes a maintenance light set on a 12-month cycle that turns on automatically to signal it's time to replace the filter cartridges.
Does installing the tap damage the countertop?
A 33 mm hole is required to install the 3-way tap. If your sink already has a pre-drilled spot for an accessory (soap dispenser, spray hose), it can often be reused.
What's the difference between mains water and filtered water on the same tap?
The 3-way tap physically separates the two circuits: the main handle dispenses hot and cold mains water, while a separate control dispenses water filtered by the OneZero. No mixing, no risk of cross-contamination.
