In article ,
David P wrote:
And yet that is exactly what I have got in the bathroom.

To repeat:
the hot water tap is fed by a tank in the roofspace
the cold water tap is fed by a tank in the roofspace

This is most unusual. Is the house very old?

There is no mains water at all in the bathroom.
Neither in the cold tap for the basin nor in the cold tap for the bath.

The bath is normally fed with 22mm pipe to give a fast flow rate from the
header tank, and unless you like cold baths there is no point in having it
on the mains, given you're as likely to 'drink' some of the hot as the
cold when bathing.

The basin is different. Many like to have a drink of water after teeth
cleaning or whatever. Have you investigated changing it to mains? All the
pipework going to the loft may well be together and of course includes
mains. So may not be that difficult to pick up.

--
*Procrastination is the art of keeping up with yesterday.

Dave Plowman London SW
To e-mail, change noise into sound.