Hello for now, I finally have a caravan since this season. It is a small “Knaus Blue Line TK 400” year 2000, since I use this now also in winter my question: I would like to buy a switch valve for the gas bottles (Truma switch valve Duo Comfort), but when looking for a plant unpacked with ice Ex works (http://www.fritz-berger.de/…/Product detail.103.0.html), do I need something like this in German winter or is it exaggerated? Is there easier and more expensive tere solutions to prevent freezing? Greetings