We protect heating and hot water systems by providing best practice solutions and products internationally.

We have a comprehensive range of products supported by approachable experts to help you achieve best practice protection for domestic and commercial systems, protecting against limescale, corrosion and accompanying problems which can cause inefficiency or failure.


Product Manuals and Guidance

Instructions, dosing information and FAQ's for our chemical, filter and scale protection products.

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Read our latest blog

Water treatment and protection best practice, industry comments and trade competitions.

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Check Water Hardness

Use our simple postcode checker to find the hardness of the water in your area.

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OEM Endorsement

The use of Sentinel water treatment is endorsed by all major international boiler manufacturers to protect their products in both the domestic and commercial markets.

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Quality Endorsement Guaranteed

Product Selector

Not sure what products are best for the job? This is a simple tool to quickly help you find the best practice solution. In 3 questions or less, it'll show you the products best suited to your job.

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Sentinel Product Range