Have found over the years the water leaking like that is normally the float system, replaced many times over the years.

Seals are no longer rubber it's plastic, not as efficient. I must say that new system looks more complicated but way more efficient in the long run, note to self!

Isn't that the most annoying thing of late nothing the same size, the sound of dripping water..., now to track it down!

@tipu curate