Bathroom Backflow Risks

A​ssisted bathing baths

Bathing equipment in a nursing or care environment is considered to be a fluid category 5 risk. The supplies to all taps and showers outlets must be protected by a suitable form of fluid category 5 backflow protection.

In practice this means being supplied from storage incorporating an adequate air gap (such as a Type AB air gap)


Or by maintaining a gap between a tap and shower outlet and spill over level of 20 mm or twice the diameter of the supply pipe (whichever is the greater) measured as shown below.


Please note this gap, must also be maintained between any shower handsets and the spill over level of toilets and bidets.


Please refer to showers and bath and basin taps for additional information.





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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.