Open Ocean Water | System Overview: How it Works

How It Works

Reverse osmosis, in three steps.

At its core, a watermaker uses reverse osmosis to turn seawater into high-quality fresh water.

Pressurisation

Seawater is pumped at high pressure across a semi-permeable membrane.

Separation

The membrane lets pure water molecules through, and blocks salts and solids.

Result

Contaminants are washed away as brine, leaving fresh water comparable to rainwater.

Why Open Ocean

Four reasons owners choose us.

Reliability through simplicity

We avoid flashing lights, complex probes and automated sensors. We believe the potential pitfalls of automation outweigh the benefits. With an Open Ocean system, you're in charge.

Modular flexibility

Components can be tucked into unused spaces throughout your boat, which makes our systems a viable option for boats of all sizes.

Global serviceability

We use non-proprietary components. Most are available from hardware stores or industrial suppliers worldwide.

04 · Freedom at sea

Making your own water changes how you cruise.

Less weight. Carry less water to increase speed and safety.
More range. Convert redundant water tanks into fuel tanks.
Better water. No more relying on questionable dock water in remote ports.

Scalable Output

How much water do you need?

Our high-flow, high-pressure pump grows with your needs. Start with one membrane and add more later if your requirements change.

Setup	Membranes	Output
Standard	1 membrane	80 L/h
Expanded	2 membranes	160 L/h
Maximum	3 membranes	240 L/h

Applies to our engine-driven and AC systems, which use the high-flow pump. The 12/24V DC High-Output system makes 70 L/h.

Maintenance And Installation

Simple to run, and within reach to fit.

Flushing

Manual flush (standard). Foolproof, cost-effective, and more reliable. We recommend a flush after each use.
Automatic flush (optional). Ideal if you leave the boat unattended for long periods. About Autoflush.

Installation

Full manual. Every system includes a comprehensive installation and operation manual.
Electric models. The simplest to install.
Engine-driven models. Need a bracket to mount the pump on the engine.
DIY friendly. Most installs can be done by a handy owner or any competent yacht service. Electrical connections should always be made by a qualified electrician.

The Systems

Pick the drive that matches your boat.

Engine-Driven

System overview: how it works