Then I would drain the water system and winterized with pink antifreeze for rvs. Ensure there is some in the sink drain too, and purchaser the pump adapter so you can use the pump to suck the antifreeze direct from the jug into the hot and cold lines. Unscrew the cover over the hot water heater and turn the bypass valves so you don't have to fill that with pink stuff, take out the anode rod and drain the hot water heater so you don't get a freeze in there, be sure to run the outside shower to clear that of trapped water until pink stuff comes out.
There are plenty of step by step guides on the web and YouTube.
With a bypass valve in the pump it should take you about 10 min.
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2011 A-122
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