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Old 04-02-2015, 11:03 PM   #7
FW28z
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Brand: Thor Motor Coach
Model: 2011 Four Winds 28Z
State: Michigan
Posts: 1,273
THOR #531
Depending on how it was winterized, you might have antifreeze in the lines. If so, you will want to run copious amounts of water through it. I would suggest buying one of those refractometers that can read antifreeze level in the water and flush the system until you no longer see any evidence of antifreeze.

Also, plan on buying a blow out fitting so you can blow the lines after your trip. Since you live in Michigan, you will not be out of danger of a hard freeze at night for another month at least. You could end up severely damaging your water system.

The system should tolerate mildly freezing temps, say 30deg for maybe a couple of hours. But a hard freeze in the 20s for 8 hours or so can do damage.
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