A water tap located in the basement is leaking when tap is opened. I inspected the tap, hoping that tightening nut would help, but it seems that the nut is sort of "soldered", i.e. it won't move:
Then I unscrewed the blue handle, and found a small plastic cap under it, that covers a shaft. I thought I'd be able to get in, if take out the shaft, and change gasket. However it seems that there's no way to loosen shaft either.
Is there a way to resolve this or I'll have to replace the whole tap?