"Rob Morley" wrote in message
t...
In article , "Graham
Culley" says...
snip

Also, do I need to drain the cistern before disconnecting the pipe,
and if so, how do I go about that?

There should be a leverto do this - sometimes on the front or side of
the cistern, and sometimes on the top activated by a chain.
Depress the lever as far as it will go and then release to empty the
cistern.

To get the remainder of the water out, syphon it using a short
length of plastic tubing (sold at B&Q). The water in the cistern is
perfectly clean (unless you have any anti limescale/bleach/whatever
tablets sitting in it!), so no worries about accidentally getting
a mouthful.