Here in Almonte, Ontario (near Ottawa) I have just dumped the water supply
and that's it !  Been doing that for the past five years with our '87
Westy and no problem with any of the components.  The entire system is self
draining to the supply tank and when it's empty the system is as well.
Steve I hope this helps you and any other northern resident Westy owners.

Cheers

Frank

--
              *  Frank Condelli  *  Almonte, Ontario, Canada  *
                      *  ad793@Freenet.carleton.ca  *
                          MGB's and Lionel Trains
                http://members.aol.com/RAlanen/homepage1.html