How deep should the trench be when when installing a new water service pipes?

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 Anglian Water for permission.

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