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This updated guide incorporates industry feedback from nearly twenty years of flushing and cleaning using BSRIA's Pre-Commission Cleaning of Pipework guides. It will replace our previous edition (AG 1/2001.1).

Thorough pre-commission cleaning of pipework has become even more important with the adoption of energy efficient controls strategies that may result in low flow rates, particularly in terminal units with very small orifices in control valves.

This guide provides the latest thinking and good practice cleaning techniques. In particular, it aims to clarify the roles and responsibilities of the parties, improve the exchange of information between them and provide consistency between service offerings of the pre-commission cleaning contractors.

Pre-commission cleaning is achieved through a process of flushing and chemical cleaning (where required) 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.

Contents include:
- Design considerations
- Inspection and witnessing
- Installation considerations
- System dynamic flushing
- Chemical cleaning procedure
- Connections between new and existing systems
 
Please note there has been an amendment to this guide since publication. Please click on 'Amendments & Corrections' on the left hand side for more details.