If the sink water tap buttons do not shut off the running water, what should be done?

Turning the water supply selector valve located under the sink to the toilet or shutting it off is a practical first step in addressing the issue of a tap that is not shutting off. This action immediately stops the flow of water, preventing further issues such as flooding or water damage. It is an essential safety measure to control the water supply quickly while you investigate or resolve the underlying cause of the faucet malfunction.

Addressing this issue by stopping the water flow gives you time to determine whether maintenance is needed, check for any visible blockages, or conduct repairs without the pressure of running water. Subsequently, this method prioritizes safety and damage control, making it a responsible choice in the scenario of a malfunctioning tap.