Jaques d'Alltrades wrote:
:: The message
:: from "Phil L" contains these words:
::
::: We don't get very rapid hard frosts in this country...it would
::: have to be instantaneous!
::: Frosts occur gradually +2 /+1/ 0/ -1 /-2 over a period of a few
::: hours...in this time what little water remains in the pipe has
::: gone...the outlet of the tap *is* the lowest point remember.
::
:: My outside tap rises from an underground supply, as does a large
:: proportion of others.
::

Yes there are exceptions, the other 99% of people who have a tap fixed to
the side of the house I meant.
:-p