Table II.

The pros and cons of sensor- versus elbow-operated taps

	Sensor-operated outlet	Elbow-operated outlet
Cons	Complexity is likely to predispose to biofilm formation Learning curve of user to operate sensor can lead to hand contaminating end of outlet	TMVs often fitted unnecessarily predispose to biofilm formation Elbow-operated handles not used correctly leading to recontamination of hands immediately after washing Tap handle often only opened slightly resulting in little water draw on hot water
Pros	Hands-free operation Operation can be automated to flush little used outlets and record data

TMV, thermostatic mixer valve.