BSRIA BG 29/2021

BG 29/2021 is the BSRIA guide that provides the latest advice on pre-commission cleaning; an essential process that helps water systems perform at their optimum.

Recently updated (April 30th 2020), the latest version includes new information relating to the importance of detecting Dissolved Oxygen (DO) and how this can be achieved using corrosion monitoring technology.

Reflecting new British and European standards, the guide should be used to inform best practice in regards to the pre-commissioning cleaning process.

BG29 covers the following areas:

  • Design considerations
  • Inspection and witnessing
  • Installation considerations
  • System dynamic flushing
  • Chemical cleaning procedure
  • Connections between new and existing systems

For more information on BSRIA BG29, click here.

To purchase BG 29/2021: Pre-commission Cleaning of Pipework, visit:

What is pre-commisioning cleaning?

Pre-commissioning cleaning is achieved through a process of flushing and, where required, chemical cleaning followed by the addition of biocides and inhibitors.

Systems designed and cleaned in accordance with BSRIA’s guidance are far less likely to experience operating problems and should run more efficiently/waste less energy.

Expert pre-commissioning cleaning services

We offer the BG29i intelligent precommission cleaning package, with a focus on data driven real-time monitoring.

We use the Hevasure system to provide real-time corrosion monitoring. This technology provides a true picture of system condition, which in turn will improve operational efficiency, prevent downtime and potentially reduce the need for flushing and chemicals.

BSRIA BG29 and beyond

Guardian has helped many buildings meet the recommendations of BSRIA’s BG29 and beyond.

What’s key about guides like BG29 is that they’re treated as such – guides. Every water system and application is different and to ensure optimum performance and efficiency, precommission cleaning approaches should be bespoke.

For more information on industry guides and how best to use them, click here.

Let us help you get the most out of BG29, contact us today.