Marine watermaker
Marine watermakers for boats: sailing yachts, catamarans, motor yachts and gulets. The quote wizard asks about your boat type, length, number of people and electrical supply.
Watermaker
Watermaker guide
The reverse osmosis principle and what a good watermaker should have: general information to know before you choose.
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How does reverse osmosis work?
Fresh water matters at sea and not every boat can store enough. In reverse osmosis (RO) systems, sea water is pushed under high pressure (55–60 bar) through membranes that act like molecular sieves; minerals are filtered out and fresh water comes out the other side.
What a good watermaker should have
- Protection against low and high pressure
- A product quality indicator and a system to reject bad product water
- Thermal protection against overload for the low and high pressure pumps
- A valve that raises pressure slowly from zero to operating pressure at every start
- A fresh water flush to protect the membranes
- A pH balancer
- Correct design
Correct design
Using the right pump with the right membrane matters. For example, using a pump of 11–15 L/min with a 4-inch membrane is a design mistake and shortens the membrane's life.
These points are a general guide for any watermaker. For maintenance, see service, maintenance and winterization; for a quote, see the quote wizard.
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