In addition to everything mentioned above, there are other causes that could cause problems in the operation of taps for fountains. Therefore, every user must know how to act depending on the type of breakdown that occurs.
If the tap does not close, the cleanliness of the closing joint should be checked. Another possibility is that the unclogger spring has been disassembled. In that case it is enough to mount again, pressing and turning it at the same time in the counterclockwise direction.
But if the tap closes too quickly, the part that will require a check is the piston gasket. It is also likely that the spring has been damaged.