Backflow protection: FAQs
What backflow protection is required for urinals?
All water fittings in a bathroom must be supplied via an appropriate and adequate form of backflow protection, one which is rated either equal to or higher than the highest downstream contamination risk (fluid category) for the type of backflow (back pressure or back siphonage) it is likely to be exposed to.
Urinals are considered to be a fluid category 5 risk.
There are two accepted methods for using mains supplied water to flush urinals:
A flushing cistern which is supplied via an appropriate form of fluid category 5 backflow protection.
A pressure flushing valve and Type DC device arrangement installed in accordance with the requirements of schedule 2 paragraph 25(c) in the relevant legislation in England, Wales, Scotland and Northern Ireland.
As some backflow prevention arrangements and devices have operational limitations you should always check with the local water undertaker to make sure they are suitable for the intended application.
For further information contact the local water undertaker.
Feedback
To improve this information please give us your feedback >
Disclaimer
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.