Watermakers and Water Purifiers

Having fresh water onboard transforms life at anchor, freeing you from the need to return to port for resupply. Choosing a watermaker should not be based solely on the nominal hourly output, but above all on your battery bank's ability to sustain the electrical load during the operating cycle. A properly sized system must balance flow rate, energy consumption, and ease of routine maintenance, such as cleaning pre-filters and flushing the membrane.

The reliability of these systems depends on corrosion-resistant materials, such as AISI 316 stainless steel or high-strength engineering polymers for high-pressure components. Remember that the osmotic membrane is the heart of the system: its proper operation requires constant pressure and thorough mechanical pre-filtration to prevent clogging from microalgae or sediment.

Nautiba steps in here to help you verify the technical compatibility of the chosen system with the available space in the bilge and the capacity of your feed pump. We do not simply supply parts - we verify consistency between the manufacturer's specifications and the actual configuration of your boat, providing clear delivery timelines so you can properly plan installation work.

What to check before installation

• Verify the system's power consumption relative to your battery bank capacity and alternator output.
• Assess the available space for the high-pressure pump and filter placement, which are critical for membrane longevity.
• Consider the actual hourly flow rate needed based on the number of people onboard and the type of passage.
• Make sure the hoses are properly sized to avoid pressure drops that would reduce osmotic efficiency.

How do I choose the right watermaker flow rate?

The choice depends on your crew's average daily consumption. For summer cruising use, calculate the average consumption per person and add a 20% margin to handle tank refills during hours of sun or engine running.

How critical is filter maintenance?

Pre-filtration is essential for protecting the osmotic membrane. Regularly replacing pre-filter cartridges prevents sediment and microorganisms from permanently damaging the heart of the system, reducing operating costs over time.

Can a watermaker be installed on smaller boats?

Certainly - compact models designed for mid-size vessels are available that optimize footprint. However, you must verify that the electrical supply system can handle the pump's startup surge, which is often higher than the steady-state draw.