Drinking Water Inspectorate (DWI) epoxy resin lining contractor approval

Under the UK's Water Supply Regulations, the Secretary of State requires epoxy resins for the lining of drinking water pipelines to be tested and approved prior to use. The application of a resin is critical to both its performance and its effect on drinking water quality. Therefore, the conditions of approval for in-situ application of epoxy resins to water pipes require lining contractors to obtain third party certification.

WRc's document 'In-situ Epoxy Resin Lining Operational Guidelines and Code of Practice' sets out the requirements that all lining contractors must complete successfully a supervised lining trial.

It is compulsory for all contractors applying epoxy resin linings to the audited prior to offering this service. WRc offers this auditing under the WRc Approved, which enables contractors to demonstrate that they are maintaining compliance with Operational Guidelines and Code of Practice.

A full list of WRc Approved contractors can be found under the Approved Products and Services

A full list of approved resins can be found on the DWI web pages.