Same plan here. Now that I have a little genny I can run many big fans to distribute heat or a small heater. I can also power an air compressor to help blow down the blue water lines if I have to; most homes have so many dips and doglegs in the piping that a gravity draindown won't cut it. I also keep enough RV antifreeze to protect all the traps.
I figured draining at the lowest point I can get to would be “enough” for blue water lines, as there’d be plenty of air-filled pipe for water to expand into as it froze. We’ve only ever once had a drain line freeze (exposed in the garage). After I wrapped it in pipe heating tape we haven’t had the issue since.
How would one use compressed air to get the rest of the blue water out?
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