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

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BS 7593:2019

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

Status : Current   Published : May 2019



BS 7593:2019 also available with tracked-changes. To learn more and buy, click HERE. 

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
TitleCode of practice for the preparation, commissioning and maintenance of domestic central heating and cooling water systems
Publication Date29 May 2019
Cross ReferencesBS EN 14743, BS EN 12828, BS EN 1717, Hazardous Waste (England and Wales) Regulations 2005, Control of Substances Hazardous to Health Regulations 2002, BSRIA BG 29, Building Regulations (Northern Ireland) 2000, Water Supply (Water Fittings) Regulations 1999, BS 5918, BS 5955-8, Building (Scotland) Regulations 2004, BS EN 14868, Trade Effluent (Proscribed Processes and Substances) Regulations 1989, Hazardous Waste Regulations (Northern Ireland) 2005, Hazardous Waste (Wales) Regulations 2005, Building Regulations 2000, Health and Safety at Work, etc. Act 1974, Special Waste (Scotland) Regulations 1996
ReplacesBS 7593:2006
Draft Superseded By18/30370405 DC
DescriptorsMicroorganisms, Contaminants, Corrosion, Sludge, Maintenance, Chemical cleaning, Cleaning, Corrosion inhibitors, Corrosion protection, Domestic, Water treatment, Space-heating systems, Hot-water central heating, Scale (corrosion), Efficiency, Central heating, Biological hazards
ISBN978 0 580 52323 6
File Size608 KB

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