What is a trench inspection and why do I need one?

A trench inspection is a visit by a South East Water technician or a Water Industry Approved Plumbers' Scheme (WIAPS) approved plumber/contractor to ensure that the pipe has been laid at the correct depth and ducted through the point of entry. 

A trench inspection is required on new service connections before we can allow a connection to be made to ensure they comply with Water Supply Regulations.

The main purpose of this is to ensure that the pipe is at a sufficient depth.
If you do not use a WIAPS approved plumber or ground worker we will need to arrange for a technician to carry this out for you.

There is a minimum and maximum depth at which service pipes should be laid:

  • Minimum depth is 750 mm
  • Maximum depth is 1350 mm

If an installer wishes to install a service pipe either deeper or shallower than these depths they must notify South East Water for permission. 

Important note: The water service pipe must be a minimum of 350 mm away from any gas supply.

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