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Blocked drains and sewers

Sewers - your responsibilities

If your property is connected to a main sewer, it will drain through a private drain or sewer and into the public sewer. The private section within your property boundary is your responsibility and you are expected to deal with any drainage problems / repairs.

If you suspect a public sewer problem contact Thames Water by calling:

  • 0800 316 9800¬†or
  • 0800 316 9898 (textphone)

A public sewer is the responsibility of the water company and is generally referred to as the main sewer.

All public sewers are shown on a set of maps provided by Thames Water.

If you are moving home

We strongly advise you find out the extent of your responsibilities if you are moving home. For newly built houses, we suggest that developers lay their drainage systems to water company specifications so that they can become their responsibility. Ask your solicitor to check.