Marine Water Treatment Solutions for Ships
Providing effective and sustainable marine water treatment, wherever you are and whatever your business.
Water is a vital element in the effective operation of every ship. Whether it’s potable water for drinking, showering and cleaning, technical water for boilers and cooling systems, or water for use in pools and spas - both the water itself and the equipment that relies upon it require the use of water treatment to ensure safe, efficient and continuous operation. These treatments must be in line with original equipment manufacturers (OEM) specifications, rules and regulations, and at the same time limit impact upon the environment.
Our water treatment product range is designed to protect your systems cost-effectively, while meeting regulatory demands. With safety as our top priority, we supply dosing and measuring equipment for safe handling of products, together with test kits for asset protection and cost control.
Our extensive network of Chemical Service Engineers are available for onboard calls. Supported by our Chemical Portal, we ensure proper monitoring and control of your water systems and prompt feedback on your test results.
Useful links
EPD now available for select products

Wilhelmsen Ships Service is proud to introduce Environmental Product Declarations (EPDs) to support customers’ purchasing decisions and sustainability reporting. While our portfolio covers a wide range of maritime products & services, EPDs are currently available for select products where environmental impact can now be transparently measured and compared.
Our Solutions
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Boiler Water Treatment
Protect your boiler. Keep treatment under control. Maintain the right boiler water conditions to help prevent corrosion and scale, protect critical equipment and support reliable operation. From treatment chemicals and test kits to automated monitoring and dosing, our solutions help you manage boiler water with greater consistency and control.
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Cooling Water Treatment
Protect your cooling system from the inside. Effective cooling water treatment helps control corrosion and deposits that can affect system condition and performance. Our treatment programmes, test kits and dosing solutions help crews maintain the right water conditions and protect engine cooling systems.
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Pool & Spa Treatment
Keep onboard pools and spas ready for use. Maintain water quality with treatment chemicals and testing solutions for onboard pools and spas. Our solutions support routine treatment, testing and maintenance, helping crews keep water conditions under control.
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Water Production Treatment
Protect water quality from the point of production. Keep evaporator, reverse osmosis and potable water systems operating as intended. Our treatment and cleaning solutions help protect equipment, maintain water quality and support reliable water production onboard.
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Water Test Kits & Reagents
Know what is happening in your water. Regular onboard testing gives crews the information they need to monitor water conditions and act when results move outside the required range. Our test kits and reagents support testing across boiler, cooling and potable water applications, from straightforward routine tests to photometer-based analysis.
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Water Treatment Equipment
Greater control over your water treatment. Improve treatment consistency with monitoring, dosing and water treatment equipment for a range of onboard applications. From manual dosing to automated monitoring and control, our solutions help maintain treatment conditions while reducing the need for manual intervention.
Featured Offers
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Know more before you discharge
Is your ballast water treatment system performing as expected? Having a ballast water treatment system onboard is one thing. Knowing it is performing as intended is another. Water conditions and operational factors can affect treatment performance. Regular onboard testing gives your crew greater visibility into ballast water quality and helps identify potential issues before discharge.
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Automated Monitoring and Dosing
From periodic checks to continuous control Boiler water conditions are constantly changing, but traditional treatment programmes still depend on periodic testing and manual adjustments. Aquaguard Plus combines automated monitoring and intelligent dosing to continuously monitor critical boiler water parameters and automatically optimizing chemical dosing in real time. The result is greater visibility, more consistent treatment, reduced manual intervention, and improved protection of your boiler system.
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Global Lab Service
Changes in onboard water quality are not always easy to see. By the time a problem becomes visible, it may already be affecting equipment, operations or the water your crew relies on. Global Lab Services gives you a clearer picture of what is happening in your boiler, cooling and potable water systems. But we do more than provide laboratory results. Our water-treatment experts help you understand the findings and identify what action may be needed. Get laboratory testing at locations convenient to your vessel’s port of call, providing timely and consistent analysis wherever your operations take you.
Wilhelmsen insights
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How to keep your boiler and cooling systems in tip-top condition
Consistent preventative maintenance of boiler and cooling systems can promote better efficiency and protect against unexpected costs resulting from corrosion and scaling problems. In this article, we discuss the challenges and how you should tackle them.
Wilhelmsen insights |
James Tan, Technical Product Marketing Manager - Oil & Water Test kits -
Managing Ballast Water discharge in compliance within the International Convention
Accession by Finland triggered ratification of The International Convention for the Control and Management of Ships' Ballast Water and Sediments (BWM 2004 Convention). It will enter into force on 8th September 2017, marking a landmark step towards halting the spread of invasive aquatic species which can cause havoc for local ecosystems, affect biodiversity and lead to substantial economic loss.
Wilhelmsen insights |
Rune Nygaard , Business Director Technical Water Solutions -
Corrosion Prevention in Steam Boiler Systems
The most common failure and repair issue is the damaging effects of corrosion - it is estimated that the cost of boiler repairs due to corrosion can be in the order of $50,000 to over $1m, plus cost of time off hire.
Wilhelmsen insights |
Rune Nygaard , Business Director Technical Water Solutions -
Download our Ballast Water Whitepaper
Whitepaper: Start Your Ballast Water Treatment Today to Reduce Operational Risks
Need advice?
With offices in 75 countries supporting our non-stop operations in 2 200 port locations across the globe, you can be assured that we have the local knowledge and industry expertise to find the best solution to cater for your needs.
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