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British Standards Introduce New Code of Practice

1st Jul 2019

Boiler Guide Team
By: Boiler Guide Team
Updated: 21st July 2021


Please note: This article only highlights some of the standards in the new British Standard BS 7593:2019. To read the full code of practice, it’s available from the British Standard Institute shop at a price of £126.

A revised British Standard has been introduced concerning the preparation, commissioning and maintenance of domestic heating and cooling water systems: BS 7593:2019.

This new standard replaces BS 7593:2006 which has been withdrawn with immediate effect.

Installers will need to be aware of the following standards when it comes to the new British Standard:

  • An in-line filter needs to be fitted to every system
  • Carry out a chemical clean and fresh water flush before fitting the inhibitor
  • Cleaning methodologies can be improved with external magnetite capture equipment and mechanical vibration of radiators
  • Annual water test to test level of inhibitor and system cleanliness
  • Every 5 years, the inhibitor should be re-dosed or a full system water test carried out
  • Includes closed loop heating and cooling circuits
  • Biocide is essential in cooling and low temperature heating systems
  • Consider biocide for higher temperature systems

The new standards have been welcomed by ADEY as it should not only improve boiler protection but the health of the entire system too.

Speaking about the new British Standard, ADEY Chief Technical Officer, Dr Neil Watson said: "We welcome the publication of the fully revised BS 7593:2019. The changes made acknowledge that chemical water treatment isn't a fit and forget solution, and magnetic filters shouldn't just be considered a 'nice to have'. Including these solutions in British Standard's BS 7593 recognises a critical shift in moving the industry towards a holistic approach to system maintenance.

"A high proportion of boilers that fail in the first year do so because of poor water quality, so by introducing regular testing and redosing, proper system cleaning and the mandatory installation of an in-line filter to the industry's code of practice, we can significantly improve the efficiency and life expectancy of every household system. This represents massive potential to contribute to the reduction of carbon emissions."

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Boiler Guide Team

About the author

Boiler Guide Team

Boiler Guide has been home to a host of heating experts who have helped millions of UK homeowners searching for advice and guidance. If you’ve got heating questions, we’ll have the answers.

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