Sentinel Product Range

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For Hydronic Heating Systems

For Renewable Energy Systems

Check out our video on best practice

The Benefits of Water Treatment

Watch this short video to find out more about the benefits of best practice water treatment for both installers and homeowners.

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The Sentinel System - Clean, Protect, Maintain

The Sentinel System

Lifetime protection for heating and hot water systems with the best practice process of Clean, Protect and Maintain


Got a question? Need advice on which product may be best suited to the job at hand?

Our Support Centre is packed with videos, FAQs and How To guides, whether you're dealing with a specific issue or simply want to know more about water treatment.

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About Sentinel

Originally launched in the UK by Grace Dearborn in 1988, Sentinel is a company with a clear goal:

we offer water treatment products and services that provide the best lifetime protection for closed loop hydronic heating systems.

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