On Sat, 03 Nov 2007 21:19:45 +0000, Peter Parry
wrote:

On Sat, 3 Nov 2007 21:01:20 +0000, Chris ] wrote:

but the cold tap has become almost impossible
to turn

Should have said it's usually the cold tap because bits of stone
settle to the bottom of the hot tank and don't make it to the taps.
Often happens when work has been done on the mains.
The instructions with Ceramic disc taps I have recently bought mention
the need for strainers/filters in the water supply .
Robert