Zero Electricity · Compact Design · Built for Life at Sea

Marine Drinking Water Purifier

Enjoy hassle-free, high-purity water on board—no power, no noise, no bulky setup, and minimal maintenance.

The OneZero

Compact & Flexible Installation
OneZero’s slim 14.2” x 14.2” x 5.9” design fits into tight marine spaces and can bemounted vertically or horizontally.

No bulky tanks or pumps required —just seamless integration under all but the stingiest of sink cabinetry.
Power-Free & Low-Pressure Operation
Forget about running extra wiring or dealing with noisy motors—OneZero requires no electricity, which means zero noise and effortless setup.

Plus, it operates down to just 22 PSI, making it perfect for your boat’s domestic water pressure.
Low Maintenance & Superior Filtration
Dual RO membranes and integrated pre/post-filters remove up to 99.9% of bacteria, viruses, chemicals, microplastics, and PFAs.

Simply replace filters once a year, swap membranes every three years, and track it all with an LED indicator—giving you the safe, fresh-tasting drinking water without the hassle.

Specifications

Refill with ease and say goodbye to carrying water bottles on board.

Enjoy purified, refreshing water while reducing single-use plastic waste.

Specifications Data

Flow Rate	3 liters/min
Dimensions	360 x 360 x 150 mm
Pressure	1.5 – 6 bars
Temperature	5ºC – 35ºC
Filter Capacity	7,000 liters
Filtration	CB AG 0.5 MS Carbon Block

Chemical Physic Analysis

Performance Test Conditions:

Inlet water Temp: 15C
TDS rejection > 90%
Recovery: 40%

Water Quality Analysis

Parameter	Unit	Inlet	Outlet
Conductivity at 25º	µS/cm	289	14.7
Hydrogen Ion Concentration	pH	8.15	7.54
Chloride	mg/l	3.1	0.223
Sulphates	mg/l	19.3	0.572
Zinc	µg/l Zn	11.8	n.r.
Calcium	mg/l Ca	32.4	1.48
Magnesium	mg/l Mg	11.5	0.45
Potassium	mg/l K	0.7	0.176
Sodium	mg/l Na	2.07	0.52
Total Phosphorus	µg/l P₂O₅	29.8	n.r.
Hexavalent Chromium	µg/l Cr	0.94	n.r.
Nitrates	mg/l	3.5	2.9

Performance

Extraordinary performance without electricity and under low pressure. You'll love this water.

Inlet Pressure & Flow Rate

Inlet Pressure			Tap Flow Rate		Refill Time
bar	kPA	PSI	l/min	gal/US	min
2.5	250	36	2.4	0.63	15
3	300	43	2.7	0.71	12
4	400	58	3.2	0.84	8

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FAQ

Frequently Asked Questions

What is the difference between UF (ultrafiltration) and reverse osmosis?

Reverse osmosis removes up to 99% of contaminants, including heavy metals and microorganisms, while UF does not filter out nitrates, endocrine disruptors, or pharmaceutical residues.

What residual pressure do I need on my boat?

It is recommended to have at least 2 bars of residual pressure to ensure optimal operation of the OneZero osmosis system.

What is the OneZero Osmosis unit supplied with?

The OneZero is supplied with all the fittings, pipes, O-rings, valves, a gooseneck, as well as the first membranes and pre- and post-filtration filters. You can also upgrade it with a 3-way tap or a tabletop fountain, but these options are additional.

What maintenance is required?

The pre-filtration and post-filtration cartridges should be replaced every 6 to 12 months, while the reverse osmosis membranes have a lifespan of 2 to 4 years, depending on usage and water quality, to maintain optimal performance.

Can I connect my osmosis unit to a fountain or an integrated tap?

Yes, the OneZero pairs perfectly with a 3-way tap, an Oceane fountain (providing fresh and sparkling water on demand), or our integrated U4/U5 taps (which also provide hot water).