Can I ask a follow-on question to the OP’s post? I’m also preparing to stay in my Montana (3625RE) full time over the winter. This model does not have factory tank heaters. I am planning on fully skirting the underside and placing one or two space heaters under there to keep everything warm. For people who have stayed in their RV’s over winter would adding tank heaters also be a wise precaution or unnecessary? In my mind if the tanks are freezing the pipes have likely frozen too? Thanks in advance!
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