Reverse Osmosis (RO)
Fresh Water Generator
Turn seawater into fresh, clean drinking water with our robust Reverse Osmosis units. Fast to install, easy to operate, and built for every type of vessel.
Easy to install
Best technology & Low energy use
Quick return on your investment
Maintenance friendly & Spare part list
Reverse Osmosis for your vessel or offshore installation
Reverse Osmosis is a desalination technology that pushes seawater through special semi‑permeable membranes to produce fresh drinking water. It’s a proven, reliable, energy‑efficient method widely used across maritime and offshore vessels.
RO fresh water generators simply use pressure, meaning they can produce fresh water even when main engines are off, including during port stays or slow‑steaming operations. Learn more about the difference between evaporators vs. RO fresh water generators.
Reliable fresh water, around the clock
Produces drinking water as long as power is available, even when engines are off.
Lower operational risk & fewer surprises
Few moving parts, no heat or steam. Stable performance with fewer surprises.
Efficient & cost‑effective over the lifecycle
Faster installation & minimal footprint
Minimal footprint, no heat integration, and designed for smooth installation — even through tight engine rooms.
Hatenboer-Water's Signature Series
Our signature series has been designed according the Hatenboer-Water standard. Available from stock for fast global delivery and installation-ready, choose the right unit for your vessel below.
Tethys (3–6 m³/day)
For short‑sea, workboats, tugs, barges, fishing vessels.
Tethys is right for you if your vessel…
- Has small crew sizes (approx. 6–12 pax).
- Has limited space, needs a compact footprint.
- Wants reliable drinking water without large investment.
- Values “fit and forget” simplicity.
The benefits:
- Compact and easy to fit on vessels where every centimeter matters.
- Standardized & in stock, meaning fast delivery.
- Ultra‑simple daily operation. Perfect for vessels where crew may not be technical specialists.
- Ideal replacement for small, aging evaporators that don’t justify overhaul.
Oceanus (16–24 m³/day)
For ferries, OSVs, tankers, mid‑size offshore vessels.
Oceanus is right for you if your vessel…
- Runs with medium‑sized crews (18–30+ pax).
- Needs a complete, plug‑and‑play skid with all treatment integrated.
- Wants a robust, low‑risk system for global operations.
- Prefers simple, durable relay‑based controls over complex automation.
The benefits:
- All‑in‑one skid: no extra loose filters or pre‑treatment gear to install.
- Compact but high‑output, suited to continuous maritime operations.
- Proven globally, installed on many different ship types.
- Fast delivery: stocked and ready to ship within 48 hours.
- Perfect for superintendents who value zero hassle and predictable uptime.
Proteus (36–100 m³/day)
For large offshore platforms, accommodation vessels, large tankers.
Proteus is right for you if your operation…
- Has large water demand.
- Requires robust, industrial‑grade design suited for offshore harshness.
- Wants pre‑ and post‑treatment fully integrated.
- Needs stable, predictable water supply for large teams.
The benefits:
- Heavy‑duty, high‑capacity desalination built for tough environments.
- One‑skid solution, simplifies installation dramatically.
- Used across large maritime operations where guaranteed water supply is non‑negotiable.
- Supported globally with spares & service hubs in Rotterdam, Houston, Singapore, Dubai.
Custom options
For those operating in more difficult circumstances, a custom‑made RO might be a better fit. Custom RO’s are built according to the same high Hatenboer‑Water standard, just engineered for higher demands, harsher environments, or tighter specifications. Wondering if this would be a better option for your vessel?
Choose Custom if you:
- Operate in Oil & Gas or other environments requiring higher safety classifications.
- Need ATEX‑certified components, special materials, or engineered‑to‑order layouts.
- Run large offshore operations where higher capacity or built‑in redundancy is essential.
- Face highly variable or challenging seawater quality that requires tailored pre‑treatment or membrane selection.
Turn seawater into fresh, clean drinking water
Safe Water On Board®
Safe Water On Board® is Hatenboer‑Water’s holistic approach to safeguarding the entire onboard drinking water chain, from production to consumption.
It recognizes that water safety isn’t guaranteed by one piece of equipment, but by the correct sequence of production → storage → disinfection → distribution → monitoring, supported by procedures, testing and lifecycle service.
Reverse Osmosis is Step 1 of achieving Safe Water on Board
Your Reverse Osmosis unit is the first physical barrier in the system: it produces clean, desalinated fresh water with predictable quality and stable output. This is the foundation everything else depends on; tank hygiene, disinfection, tap‑point quality, legionella control, and regulatory compliance.
Reverse Osmosis Fresh Water Generators deliver consistent, safe feedwater to the rest of the chain.
Its reliability ensures the downstream systems aren’t having to compensate for poor or variable water quality.
Frequently asked Questions
What frequency/voltage do you support?
50/60 Hz configurations are available for global fleets.
How fast can we receive a unit?
Standard Signature Series units typically ship within 48 hours from global hubs.
Can we self commission?
Yes, although we recommend commissioning by Hatenboer‑Water to ensure optimal long‑term performance.
Will it fit through narrow engine room access?
Yes, Oceanus and Proteus can be divided for installation through tight spaces; Tethys is ultra‑compact.
Our offices, our distributors and our agents
How can we help?
Whether you need information, advice, a quote or have any other question, we’re here to help.
Choose your region
Contact us
Request a quote