Backflow: Overview

Does zone or wholesite backflow protection have to be installed?

Under schedule 2 paragraph 15(4) a water undertaker can require zone and/or wholesite protection to be installed. 

The level of zone and whole-site backflow prevention required, and the type of backflow prevention device or arrangement to be used, is determined by the water undertaker. The provision of zone and/or whole-site backflow prevention does not relax the requirement for any other required backflow prevention provision within premises.


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Uncontrolled if downloaded. This is informative, non-statutory guidance and intended for general guidance purposes only; it is subject to change.

Compliance with this information should not be relied upon as guaranteeing no enforcement action will be taken by water undertakers. Water Regs UK accepts no liability for loss, indirect or consequential loss arising from or in connection with this guidance document.