DIYbanter - View Single Post - Reconditioning dripping ceramic disc tap?

Harry Bloomfield, Esq.

laid this down on his screen :
I found that putting a fibre washer between the cartridge and the tap has
sorted my dripping tap. I suspect the ceramic discs do not leak but the
blue/red plastic rings deteriorate with time. Try it.

Limescale forms on the ceramic sealing surface, particularly on the hot
taps - try soaking in limescale removal solution overnight. Acetic acid
is a good limescale remover.