Discover BS 9593:2024 companion standard, BS 7593:2019+A1:2024
Code of practice for the preparation, commissioning and maintenance of domestic central heating and cooling water systems.

What is BS 9593:2024 - Assessment for the performance of chemical inhibitors for use in domestic central heating and cooling water systems about? 

A companion standard to BS 7593, BS 9593:2024 describes how to assess the performance of chemical inhibitors used in domestic  central heating and cooling water systems.

Who is BS 9593:2024 - Assessment for the performance of chemical inhibitors for use in domestic central heating and cooling water systems for? 

Users of this standard include: 

• the heating and cooling system industry;
• manufacturers;
• suppliers of chemical inhibitors;
• consultants;
• water treatment specialists; and
• testing laboratories.

What does BS 9593:2024 - Assessment for the performance of chemical inhibitors for use in domestic central heating and cooling water systems cover? 

BS 9593:2024 has been developed to provide a method of testing chemical inhibitors, as referenced in BS 7593. 

It describes a method of test for the assessment of performance of chemical inhibitors for corrosion and scale inhibition and compatibility with non-metallic components in domestic central heating and cooling water systems. Inhibitors that meet this test method can be considered to provide the system protection recommended by BS 7593.

The performance of the chemical inhibitor is evaluated in three stages:

• a short-term laboratory evaluation, performed in conventional glassware, to determine the corrosion rate and any pitting of standard metal coupons in inhibitor solutions at the manufacturer’s recommended strength;

• a short-term laboratory evaluation, performed in conventional glassware, to determine the tendency of the inhibited solution to form scale; and

• an evaluation of the effect of the inhibitor on non-metallic materials.

NOTE: BS 9593 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.

Why should you use BS 9593:2024 Assessment for the performance of chemical inhibitors for use in domestic central heating and cooling water systems – Test method?

The UK government recognizes that heating homes is a major contributor to CO2 emissions in the UK, thus it's more important than ever to make sure that domestic central heating and cooling systems operate at peak efficiency. 

With that in mind, BS 9593:2024 helps:

• minimize corrosion and scaling;
• prevent component damage and premature failure;
• protect against freezing;
• minimises any remedial action needed;
  
• extend system life;
• lower energy consumption when compared to a dirty/ scaled system;
• maintain system performance;
• minimize noise by reducing kettling caused by limescale; and
• enable compliance with Part L of Building Regulations.
  

What has changed?

BS 9593:2024 is a new standard, introduced to complement BS 7593:2019+A1:2024 Code of practice for the preparation, commissioning and maintenance of domestic central heating and cooling water systems.