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London sewer flooding prevention

We’re supporting our customers in London affected by sewer flooding in July 2021. The storms that caused this are rare, but we want to reduce the impact they could have on homes and businesses.

We’re planning to survey the sewers of the properties that reported flooding using our sewer flooding questionnaire. If the survey shows the risk of sewer flooding is higher, we'll install devices, such as one-way valves, to help protect these properties.

If you flooded on 12 July 2021 and haven't yet submitted a form to us, you can complete it now to be included.

Submit a form

Your questions answered

Please note, that the offer of the survey and any subsequent installation of flood protection does not imply that Thames Water is accepting liability for damage caused by any previous flooding at your property.