Tethys;
3-6 m3 capacity
Small. Compact. Proven.
Reverse osmosis fresh water generator for short‑sea, workboats, tugs, barges, fishing vessels
Meet the RO that fits where others can’t
When space is extremely limited and the crew just needs reliable drinking water without complexity, Tethys delivers. This reverse osmosis fresh water generator is compact, durable and built for vessels where every centimeter counts without sacrificing the quality or reliability Hatenboer‑Water is known for.
Safe Water on Board®
Tethys is your first step in the onboard water safety chain.
It produces the fresh water that flows into your tank, through your disinfection system, to your taps and crew.
Reliable water production is the start of reliable water safety across the entire vessel.
Is Tethys the right RO for your vessel?
Our Tethys RO Fresh Water Generator is for you if your vessel…
- Has a small crew (approx. 6–12 pax typical short sea scenario).
- Operates on routes where simplicity is a must and crew don’t have time for complicated systems.
- Has very limited installation space and you need a plug in solution that actually fits.
- Requires a cost effective, proven alternative to replacing a small, aging evaporator.
- Needs water production that is stable, predictable, and requires almost no daily attention.
Tethys is designed exactly for these realities, it’s been used worldwide on small and short‑sea vessels for years and is built to withstand the conditions these vessels face.
The benefits
Compact by design
A space efficient unit, engineered to deliver full performance while fitting seamlessly into tight engine rooms or any space‑restricted installation.
Fast delivery
Tethys is a standardized unit and is available from stock at competitive rates, meaning you’re not waiting weeks or months for production.
Simple daily operation
Tethys is engineered to be installation-ready and durable, perfect for vessels where the crew is multitasking and not always technically specialized.
Reliability in small vessel environments
Built with a robust, heavy‑duty design, Tethys consistently supplies 3–6 m³/day of potable water from seawater of any salinity, exactly what small ships need to stay independent.
Technical snapshot
- Output: 3–6 m³/day fresh water from seawater
- Power: Low energy demand (3 kW)
- Design: Compact, lightweight, marine‑ready
- Installation: Installation‑ready unit
- Best for: Small vessels, unmanned platforms and space‑limited installations
Compact, dependable fresh water at sea.
Frequently asked Questions
Is Tethys easy to operate and maintain?
Yes. Tethys is designed as a low‑maintenance reverse osmosis water maker for vessels with limited crew and time. Daily operation is simple, and maintenance is limited to routine consumables and standard checks. If you are ever in need of assistance, our service engineers are here to help.
How reliable is Tethys in daily use?
Will Tethys fit on vessels with very limited space?
Can Tethys replace a small evaporator?
Yes. Tethys is often selected as a modern replacement for aging small evaporators, offering reliable fresh water production with less complexity and lower operational burden.
How quickly can Tethys be delivered?
Tethys units are standardized and available from stock, allowing for fast delivery when replacement or retrofit timelines are tight.
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