Quote:
Originally Posted by Pete'sMH
What are you doing about the gray and black tanks? Just curious as I think having them freeze is an even bigger issue than the fresh water.
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Actually water in any of the 3 tanks freezing wouldn't be that big of a deal. As water freezes it expands; the tanks provide a place for that expansion (even when full the water/ice could expand into the vent lines).
Black/grey tanks are even more vented than the fresh tank.
Where the damage occurs is in the closed up part of the water system: The pex lines, the water pump, valves with water in them, etc.