WRc Sewerage Manual

The WRc Sewerage Manual, often paired with the Sewerage Rehabilitation Manual (SRM), is a long-standing UK industry reference covering sewerage design, condition assessment, rehabilitation and asset management practice. Published by the Water Research Centre on behalf of the UK water industry, it informs the way that water and sewerage undertakers, including Thames Water in Greater London, evaluate the condition of public sewers and prioritise rehabilitation. While the manual is not statutory, it is widely cited in specifications, framework contracts and CCTV survey reporting. Practical implications for contractors include the use of WRc coding standards for sewer condition classification, used in property purchase surveys and adoption surveys alike. Owners commissioning a CCTV survey should expect the report to reference the WRc Manual of Sewer Condition Classification rather than informal grading systems.