National Sewerage Association

of the United Kingdom

The members of the National Sewerage Association are, generally, engaged in the inspection and maintenance of drainage and sewerage systems working to nationally accepted standards. Some specialise whilst others provide a broader range of services.

If you are new to our site, please do look at our News and Information area for more detailed information about issues relative to our industry.

If you would like additional information or clarification please contact the Secretary.

Members should log on for access to Association notes. 

The proposed changes to the pipe defect classification certification for mainline sewers (OS19) are now in place.  The new certificate will be issued by WRc and training will continue to be carried out by Develop.  This certificate will be renewable every five years and will be a requirement of the Water Companies by the end of the current AMP period at the latest (2020).  A conversion course is now being run by Develop.