Backflow Protection: FAQs

What level of risk are pre-rinse pot wash taps?

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.



To improve this information please give us your feedback >

Due to your Privacy Preferences, you'll need to enable reCaptcha cookies before completing this form.


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.

We use cookies to give you the best possible experience with Water Regs UK. Some are essential to provide website functions and ensure the website is secure. We also use cookies to help us understand how people use the site and to make improvements. Click "Accept All" to enable recommended settings or click "Manage cookies" to adjust your settings. For more details, see our Cookie Policy.