BS 7593:2019 - TC

What is BS 7593 - Domestic central heating and cooling water systems about?

BS 7593 is an industry code of practice on how to prepare circulating water during the initial commissioning (or re-commissioning) of domestic central heating and water cooling systems.

It also covers ongoing water treatment to ensure consumers enjoy optimum, efficient, trouble-free performance and protection against premature failure.                       

Who is BS 7593 - Domestic central heating and cooling water systems for?

• Boiler manufacturers
• Central heating installers
• Central heating maintenance contractors
• Treatment product suppliers

Why should you use BS 7593 - Domestic central heating and cooling water systems?

BS 7593 supplies recommendations on best practices for the preparation of the circulating water in open vented or sealed heating and cooling systems in individual domestic premises during initial commissioning (or re-commissioning following major remedial work, e.g. boiler replacement). It also recommends ongoing water treatment to ensure appliance and system protection and continued efficiency in operation.

The standard ensures awareness of potential problems and of remedies that maintain efficiency and maximize the life of heating and cooling systems. It covers sealed cooling systems; treatment of water to overcome scale and corrosion; cleaning and flushing of systems; and advice on the use of in-line filters.

Note: BS 7593 does not apply to commercial or municipal premises or to multiple residential premises served by one common circuit unless that common circuit can be effectively cleaned and flushed with domestic equipment. It does apply to individual heating and cooling circuits within individual dwellings in multiple residential premises.   

What’s changed since the last update?

BS 7593:2019 is a full revision that introduces the following principal changes:

• A widening of the scope to include open vented or sealed cooling systems in individual domestic premises
• The addition of a glossary of terms and definitions
• Revised and simplified cleaning and flushing methodologies
• A new clause on in-line filters
• A new clause on testing and ongoing maintenance