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The backflow risks associated with hose union taps will vary dependent upon their use (intended or otherwise) and the environment in which they are sited. Ultimately it is for the local water undertaker to determine whether fluid category 5 backflow protection is required.
Factors taken into account when assessing those supplying watering or irrigation systems included but are not limited to:
The installation of an irrigation system must be notified, conditions are likely to apply
To avoid the risk of cross connection with other supplies irrigation system pipework should be clearly marked in accordance with BS 1710.
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.