We live lakeside here in Maine and are surrounded with neighbors who winter in Florida. In October the plumbers start showing up to drain the water systems and put environmentally safe anti-freeze in the toilets. The doors are then locked until Spring when the water gets turned back on. This way you do not have to heat the house. If you do not drain the systems and the power goes out you risk a freeze up in the house not to mention the cost of heating a house that is empty.
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