Over the last week the HW tap on the bathroom hand basin has slowed to a dribble. I took the tap apart and found nothing wrong. Opening the stop valve slowly to max and it still dribbles out so there must be a blockage in the pipe or the stop valve is blocked.
The bath tap is fine so a blockage in the pipe seems unlikely.
Do the rotating ball type stop valves seize up? It opens and closed normally.
