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On this page you will find information relating to aspects of plumbing, including the safe installation of water services, our Water Byelaws, and how to notify Guernsey Water if you are carrying out any plumbing installations or alterations.

The Water Byelaws

The Water Byelaws (Guernsey) Ordinance 2003 was implemented so that Guernsey Water (and previously the States Water Board) would be able to set and enforce a number of regulations regarding the safe installation of plumbing services and equipment.

The Water Byelaws document was originally published as a hard copy document which could be purchased from Guernsey Water. However, the document is now available to download in electronic format for free by clicking the button below.

pdf icon The Water Byelaws [16Mb] 

These byelaws are extremely important - they are in place to protect the Island's water supply, and any contravention of them could lead to a fine.

As an example of what is covered by the byelaws, the diagram below demonstrates the correct relative position of utility services when installing or altering water pipes:

A byelaw diagram

Plumbing Notifications

Anybody who is planning to carry out plumbing installations or alterations must fill in and submit a plumbing notification form to Guernsey Water prior to the completion of works and before underground service pipes are covered.

You can advise us of an alteration or installation by clicking the button below.

Plumbing Notification Form


For queries on any plumbing issue, please contact us on 01481 229500, or via e-mail at

Document Downloads

- Water Byelaws

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