Under Section 185 of the Water Industry Act 1991, a builder or developer can request that a public sewer is altered or removed to allow a site to be improved.
Our S185 Sewer Diversions Guide (PDF 158 KB opens in a new window) should provide all of the information that you need to support you with a possible sewer diversion. You can then complete the S185 sewer diversions application form (PDF 254 KB opens in a new window).
If we agree (in writing) for a developer to construct the sewer diversion, they must enter into a legal agreement and their contractor must complete a Request for permission to work on a public sewer form (PDF 169 KB opens in a new window). For our requirements for technical drawings, please see our standard Developer Services Construction details document (PDF 2,181 KB opens in a new window).
You and/or your contractor must not complete any work on the public sewer without prior agreement from United Utilities.