BS 7593 Code of practice for the preparation, commissioning and maintenance of domestic central heating and cooling water systems

BS 7593:2019 - TC

Tracked Changes. Code of practice for the preparation, commissioning and maintenance of domestic central heating and cooling water systems

Status : Current   Published : June 2019


What is a tracked changes standard? 

A tracked changes version of a Standard indicates the changes made, during the standards revision process, between the active standard and its previous version. Additions, deletions, and other formatting and/or content revisions are clearly displayed as underlined and strikethrough texts, ensuring all changes made between the two documents are quickly and easily identified.

What is this standard about?

This 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 this standard for?

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

Why should you use this standard?

It supplies recommendations on best practice 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 the ongoing water treatment to ensure appliance and system protection and continued efficiency in operation.

The standard ensure awareness of potential problems and of remedies which 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 use of in-line filters.

Note: This standard 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?

This is a full revision which 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

Standard NumberBS 7593:2019 - TC
TitleTracked Changes. Code of practice for the preparation, commissioning and maintenance of domestic central heating and cooling water systems
Publication Date05 June 2019
Normative References(Required to achieve compliance to this standard)BS EN 1717, BS EN 14743, BS EN 12828
Informative References(Provided for Information)Health and Safety at Work, etc. Act 1974, Hazardous Waste (England and Wales) Regulations 2005, Trade Effluent (Proscribed Processes and Substances) Regulations 1989, Control of Substances Hazardous to Health Regulations 2002, Special Waste (Scotland) Regulations 1996, BS 5918, Building Regulations (Northern Ireland) 2000, Building (Scotland) Regulations 2004, BSRIA BG 29, Water Supply (Water Fittings) Regulations 1999, BS EN 14868, Hazardous Waste Regulations (Northern Ireland) 2005, BS 5955-8, Hazardous Waste (Wales) Regulations 2005
DescriptorsCorrosion protection, Maintenance, Biological hazards, Microorganisms, Efficiency, Cleaning, Space-heating systems, Corrosion inhibitors, Domestic, Contaminants, Scale (corrosion), Corrosion, Chemical cleaning, Central heating, Hot-water central heating, Sludge, Water treatment
ISBN978 0 539 05132 2
File Size1.193 MB

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