In order to remember the lessons we have learned in recent years I would like to write a ‘best practice’ article on preparing a boat to overwinter (unattended) in very cold climates. It would be great to use this thread to collate the experiences of others.
Simon

Hi Daria,
Another good reason to cobble together (quite easy) a bypass for the hot water heater/calorifier is that it just takes a lot of antifreeze to ensure that it has enough in it to keep from freezing. Emptying it is more of a sure thing. The by-pass may also keep your fresh water system (at least the cold water part) functional if (when) your hot water heater/calorifier goes bad.
My best, Dick Stevenson, s/v Alchemy