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.


Keep customers warm and happy by cleaning, protecting and maintaining domestic heating and hot water systems.

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Domestic installer working on boiler


Our unique product and service offering enables installation and maintenance teams to keep systems protected and tenants happy.

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Happy Tenant in Warm Kitchen


Larger civic and commercial properties need protection too, so we've developed our Commercial range of products specifically.

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Commercial Property

Video: Best Practice Water Treatment

This short video introduces The Sentinel System, demonstrating water treatment best practice for optimum central heating efficiency and protection.

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Sentinel Video on Best Practice Water Treatment

Latest News

Keep up to date with the water treatment world and all things Sentinel. You can find all of our most recent updates in one place; from press releases and case studies to events and our latest blog posts.

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Best Practice Video