What is the maximum flow rate for public bathroom washbasin taps?

The correct answer reflects the established guidelines for flow rates in public bathroom washbasins, which are designed to promote water conservation while still providing adequate usability for public facilities. The flow rate of 1.9 liters per minute is understood to balance these two considerations effectively.

This rate allows for sufficient water pressure needed for effective handwashing while minimizing excessive water usage, thus contributing to sustainability goals. Regulations around the flow rate for taps, especially in public places, aim to reduce waste without compromising hygiene standards.

Other flow rates suggested in the choices either exceed the recommended maximum or fall short, which may not meet the guidelines set by environmental standards or local building codes in many regions.