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Yacht Water Filtration: Choosing the Right Filters for Clean Water

Jun 25, 2024

Ensuring the supply of clean and safe water onboard a yacht is crucial for the health and comfort of all passengers and crew. Yacht water filtration systems play a pivotal role in maintaining water quality, and understanding the best practices for selecting and maintaining these systems is essential. This blog post delves into the importance of yacht water filtration, the various types of water filters available, the significance of quality filters, and the role of filter housings.

Importance of Yacht Water Filtration

As a result of water coming from various sources, including onboard tanks, shore supplies, and from reverse osmosis, it is important to filter and purify the water to ensure it is safe for drinking, cooking, and bathing. Various contaminants such as bacteria, chemicals, viruses, and sediments can pose serious health risks, making water filtration an indispensable aspect of yacht maintenance.

Types of Filters and Their Applications

    Different types of filters serve distinct purposes in a yacht’s water filtration system. Understanding the function and application of each type helps in making informed decisions. It is important to note that there are more options available, but these are the most commonly found on the majority of systems.

    Polywound Filters

    Polywound filters are commonly used for their excellent sediment filtration capabilities. Made from polypropylene, these filters are ideal for removing large particles and sediments from the water. They are often the first line of defense in a multi-stage filtration system, ensuring that larger contaminants are captured early on. Always ensure the filters are of food grade quality.

    Application: Pre-filtration to remove sediments and large particles.


    • High dirt-holding capacity
    • Cost-effective
    • Suitable for high-flow applications

    polywound filters

    Carbon Filters

    Carbon filters are necessary for removing chlorine, volatile organic compounds (VOCs), and other chemical contaminants that can affect the taste and odour of water. These filters are highly effective in improving the overall quality of water by adsorbing impurities onto the surface of the activated carbon.

    Application: Improve taste and odour.


    • Excellent chemical absorption
    • Enhances water taste and odour
    • Reduces chlorine and VOCs

    carbon filters

    Pleated Filters

    Pleated filters offer a larger surface area compared to other filter types, making them distinctly efficient in trapping particles. They are suitable for both fresh and seawater filtration.

    Application: Sediment filtration used as pre-filtration in reverse osmosis.


    • Large surface area
    • High filtration efficiency

    pleated filters

    Meltblown Filters

    Meltblown filters are helpful in capturing both large and small particles, making them versatile for various filtration needs.

    Application: General sediment filtration and polishing.


    • Gradient density structure
    • High particle retention
    • Cost-effective

    Octo Marine Meltblown Filters

    Submicron Filters

    Submicron filters effectively remove 99.9% of cryptosporidium and giardia cysts, as well as extremely fine sediment particles.

    Application: Best as final polishing filters for drinking water outlets and dispensers.


    • Reduces bacteria and cysts
    • Cost effective high performance filtration

    For other types of quality filters from Octo Marine, you can find them here.

    Real-World Example: Comprehensive Yacht Filtration Setup

    To illustrate the effective use of various filters, let’s consider a real-world example of a comprehensive water filtration system onboard a superyacht.

    System Overview: The yacht’s water filtration system is designed to ensure that water from onboard tanks, shore supplies, and seawater is filtered and purified to the highest standards. The system comprises multiple filtration stages to address different types of contaminants.

    1. Polywound Filter Stage:
      • Location: Main water intake point
      • Function: The polywound filter acts as the first line of defence, removing large sediments and particles from the incoming water.
    2. Pleated Filter Stage:
      • Location: Most commonly as reverse osmosis pre-filtration.
      • Function: 25µ and 5µ filters are used to remove particles to protect the high pressure pump and membranes.
    3. Carbon Filter Stage:
      • Location: At the main water intake and post tank.
      • Function: The carbon filter removes chlorine, VOCs, and other chemical contaminants, significantly improving the taste and odor of the water.
    4. Meltblown Filter Stage:
      • Location: At the main water intake or pre-reverse osmosis.
      • Function: The meltblown filter is a graduated filter with the exterior being a higher micron rating than the centre. This ensures ‘depth filtration’ of a high quality.
    5. Submicron Filter Stage:
      • Location: Point of use.
      • Function: They reduce cysts and fine sediment particles, and ensure high performance filtration.
    6. Inline Filter Stage:
      • Location: Point of use drinking water.
      • Function: Improve the quality and taste of drinking water

    Slimline Filtration System

    System Benefits:

    • Comprehensive Filtration: The multi-stage approach ensures thorough removal of sediments, chemicals, and microorganisms.
    • Enhanced Water Quality: The combination of different filters and suitable sterilisation guarantees clean, safe, and great-tasting water.
    • Reliability and Safety: High-quality filters and housings provide consistent performance and longevity, minimising maintenance needs and health risks.

    It is important to note that this is one basic example, but every yacht requires a unique set up based on their requirements. Get in touch with our team to help build the perfect system for your yacht.

    Importance of Quality Filters

    The quality of filters cannot be ignored when it comes to yacht water filtration. High-quality filters ensure efficient removal of contaminants, longevity, and reliability. Using cheap imitations and filters with poor quality can lead to inadequate filtration, frequent replacements, and potential health risks. It is crucial to invest in reputable brands and certified products to guarantee the safety and quality of the water onboard.

    Filter Housings: The Overlooked Champions

    Filter housings are an integral component of a yacht’s water filtration system, providing the necessary support and protection for the filters. They come in various sizes and materials, designed to withstand different pressures and environmental conditions.

    Importance of Premium Filter Housings

    Our Filter Housings are designed for general water filtration applications. It is a Commercial Grade Housing that will handle your water filtration needs for many years. Accepts industry standard 4.5” x 10” filter cartridges such as pleated, melt blown, poly wound, gradient density and carbon.


    • Versatile and compatible with various filters
    • Easy to install and maintain
    • Durable construction

    filter housings

    Best Practices for Yacht Water Filtration

    Ensuring clean and safe water onboard requires more than just installing the right filters and housings. Here are some best practices to follow:

    Regular Maintenance

    Routine maintenance is essential for the optimal performance of the water filtration system. This includes:

    • Regularly replacing filters according to the manufacturer’s recommendations
    • Inspecting filter housings for any signs of damage or wear
    • Sterilising the filter housings
    • Flushing the system periodically to remove accumulated sediments

    If you need assistance with this speak to our Installation and Maintenance Team

    Monitoring Water Quality

    Regularly testing the water quality helps in detecting any issues early and ensures that the filtration system is functioning effectively. Use Water Testing Kits or get use our Certified Testing Technicians to check for contaminants such as bacteria, chlorine, and heavy metals.

    Using Certified Products

    Always opt for filters and filter housings that meet industry standards and certifications. This ensures that the products are reliable and effective in removing contaminants.

    Choose Octo Marine For Your Filtration Needs

    Yacht water filtration is a critical aspect of ensuring the health and safety of everyone onboard. By understanding the different types of filters, the importance of quality, yacht owners and crew can make informed decisions to keep clean and safe water.

    Regular maintenance, monitoring, and the use of certified products are key practices that contribute to the effective operation of a yacht’s water filtration system. Make sure to invest in the right filtration solutions to enjoy peace of mind and a healthy onboard environment.

    For more information on high-quality filters and filter housings, make sure to contact us at Octo Marine. We’ll be happy to assist.

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