You will have nothing to worry about...with temps just being there a couple hours, your lines won't freeze, and certainly not freeze hard enough to freeze solid and prevent flow...just make sure you have lots of blankets or an electric heater or a full propane tank if you have a furnace, because it will get pretty cool inside.
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2016 Chevy Silverado 2500 Duramax
2016 Rockwood 8289WS, Diamond Pkg.
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