Specific Installation Guidance

Backflow Protection


Pre-rinse pot wash tap

Providing a Type AUK3 tap gap is maintained a trigger-operated hose attachment used to pre-rinse crockery and cutlery in non-domestic premises only requires the installation of backflow protection rated at least fluid category 2 to ensure separation of the hot and cold supplies. 

Please note if the tap gap cannot be maintained for any reason, for example the spring retraction system is damaged, alternative means of providing fluid category 5 backflow protection will be required.

If there are any further questions, please contact the local water undertaker for advice.


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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.