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Writer's pictureAndrea Ryan

The Ultimate Guide to Choosing a Water Maker for Your Boat: What You Need to Know

For boat owners who spend extended periods at sea, having access to fresh water is essential. Whether you're cruising along the coastline or embarking on an open ocean adventure, a reliable water maker can make all the difference. A water maker transforms seawater into fresh, drinkable water, providing independence and convenience while reducing the need for heavy water storage. In this ultimate guide, we’ll help you navigate the essentials of choosing the right water maker for your boat, covering everything from capacity and types to installation and maintenance.


If you're in the market for a water maker, look no further than S & S Dockside Marine Supply. We offer a variety of high-quality options, including the Aquamatic series, known for its efficiency and reliability. Let’s dive into what you need to know before making your purchase.


Choosing the right water maker for your boat can make your time on the water much less stressful.

Why Do You Need a Water Maker on Your Boat?

A water maker is not just a luxury—it’s a necessity for many boat owners. Fresh water is needed for drinking, cooking, showering, and cleaning. While carrying extra water tanks is an option, it’s not always practical, especially on long voyages or smaller vessels where storage space is limited. A water maker offers the following benefits:


  1. Unlimited Fresh Water Supply: With a water maker onboard, you can produce fresh water as needed, eliminating concerns about running out.

  2. Extended Cruising Capability: Having a water maker allows you to stay at sea longer without needing to dock for water resupply.

  3. Space Savings: Without the need to carry large quantities of fresh water, you can free up valuable storage space for other essentials.

  4. Convenience and Comfort: Enjoy hot showers and clean dishes without worrying about depleting your water reserves.


Key Factors to Consider When Choosing a Water Maker

When it comes to selecting the right water maker for your boat, there are several important factors to consider. Here’s what you need to look at before making your decision.


1. Capacity: How Much Water Do You Need?

The capacity of a water maker is one of the most crucial factors. Capacity is typically measured in gallons per hour (GPH) or liters per hour (LPH). The right capacity for your boat depends on your water consumption needs and the number of people onboard.


  • Small Boats (Under 30 Feet): These vessels usually require a water maker with a capacity of 5-10 GPH, sufficient for limited use such as drinking and cooking.

  • Mid-Size Boats (30-50 Feet): If you’re planning longer trips with multiple passengers, opt for a water maker with a capacity of 10-20 GPH. This allows for more consistent use, including showers and cleaning.

  • Large Boats and Yachts (50 Feet and Above): For larger boats or full-time liveaboards, a high-capacity water maker (over 20 GPH) is recommended. This ensures a continuous supply of water for multiple uses without strain.


Pro Tip: Always choose a water maker with a slightly higher capacity than you anticipate needing. This provides a buffer for unexpected demands or extra passengers.


2. Types of Water Makers: Which One Is Right for You?

There are several types of water makers, each with its own set of advantages and potential drawbacks. Understanding these can help you choose the best fit for your vessel.


Reverse Osmosis (RO) Water Makers

The most common type, reverse osmosis (RO) water makers, use a high-pressure pump to force seawater through a semi-permeable membrane, filtering out salt and impurities.

  • Pros:

    • Highly efficient at removing contaminants.

    • Produces high-quality, drinkable water.

  • Cons:

    • Requires regular maintenance.

    • Can be power-intensive, depending on the model.


Electric Water Makers

Electric water makers run on AC or DC power and are ideal for boats with strong electrical systems or those that frequently use generators.

  • Pros:

    • Reliable and capable of producing large volumes of water.

    • Offers automated operation and monitoring.

  • Cons:

    • May drain batteries quickly without a generator.

    • Not ideal for boats with limited power capacity.


Engine-Driven Water Makers

These water makers are powered by the boat’s engine, making them a great option for those who frequently run their engines during voyages.

  • Pros:

    • Highly efficient while the engine is running.

    • Lower electrical demand on the boat’s battery system.

  • Cons:

    • Limited operation when the engine is off.

    • More complex installation process.


Manual Water Makers

For emergency use or backup, manual water makers are lightweight, portable units that can be operated by hand.

  • Pros:

    • Great for emergency situations.

    • No electrical power required.

  • Cons:

    • Produces limited amounts of water.

    • Labor-intensive and time-consuming.


3. Installation Requirements: Space and Power Considerations

Before purchasing a water maker, assess the available space on your boat for installation. Water makers come in various sizes, and the right one for your vessel will depend on its layout and power capabilities.


  • Space: Ensure there’s enough room for both the main unit and its components, including pre-filters, pumps, and membranes.

  • Power Supply: Consider the electrical demands of the water maker. Some units require AC power, while others run on DC. If your boat’s power system is limited, look for energy-efficient models or those compatible with solar or wind power.


Aquamatic Water Makers, offered by S & S Dockside Marine Supply, are known for their compact design and ease of installation, making them a top choice for boat owners with limited space.


4. Maintenance Needs: Keeping Your Water Maker in Top Shape

Regular maintenance is key to ensuring the longevity and efficiency of your water maker. Here’s what to keep in mind:


  • Pre-Filter Replacement: Change the pre-filters regularly to prevent clogs and maintain optimal performance.

  • Membrane Cleaning: The reverse osmosis membrane needs periodic cleaning to remove salt and mineral buildup. Use a manufacturer-recommended cleaning solution.

  • System Flushing: Flush the system with fresh water after each use to prevent corrosion and extend the life of the components.

  • Descaling: Perform descaling when needed to remove hard water deposits, especially if you operate in areas with high mineral content.


The Aquamatic series from S & S Dockside Marine Supply includes built-in maintenance alerts, helping you stay on top of necessary upkeep.


5. Brand Spotlight: Aquamatic Water Makers

If you’re looking for a reliable, efficient, and easy-to-use water maker, the Aquamatic series is an excellent choice. Here’s why Aquamatic stands out:


  • Advanced Technology: Aquamatic water makers utilize cutting-edge reverse osmosis technology for superior water quality.

  • Automated Operation: With fully automated systems, Aquamatic takes the hassle out of water making. Simply set your preferences, and the system handles the rest.

  • Energy Efficiency: Designed with energy conservation in mind, Aquamatic models require less power without sacrificing performance.

  • User-Friendly Interface: Intuitive controls and monitoring systems make it easy for boat owners to operate and maintain their water maker.


S & S Dockside Marine Supply proudly carries the Aquamatic series, offering support and expertise to help you select the perfect model for your vessel.


Choose a water maker that provides the best environment for your boat on the water.

Tips for Maximizing Your Water Maker’s Efficiency

To get the most out of your water maker, follow these tips:


  1. Install in a Well-Ventilated Area: This helps prevent overheating and ensures optimal performance.

  2. Use Fresh Water for Flushing: Flushing with fresh water after use removes salt and prevents corrosion.

  3. Monitor Power Usage: Keep an eye on power consumption to avoid draining your batteries unexpectedly.

  4. Check Local Water Conditions: In areas with high salinity or heavy sediment, you may need to clean the filters more frequently.


Choosing the right water maker for your boat is a significant decision that can enhance your cruising experience, increase your independence on the water, and provide a consistent supply of fresh, drinkable water. By considering factors like capacity, type, installation requirements, and maintenance needs, you can find the perfect fit for your vessel.


At S & S Dockside Marine Supply, we offer a range of top-quality water makers, including the highly-rated Aquamatic series. Whether you’re a weekend sailor or a full-time liveaboard, we have the expertise and products to meet your needs. Visit us online or contact our team to learn more about our selection and get started on your journey to reliable, worry-free fresh water production.


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