Frozen House
Pex is a lot more forgiving than copper. What can happen if pex is frozen is that it can blow the fitting away from the tubing. When thawing out a house, it is safer to thaw it very slowly. All the appliances listed could be damaged, but the hot water heater was not mentioned. also, if on a well, the expansion tank could be damaged.
Before turning the water back on, the entire system should be pressurized with a compressor to check for damage.
MOXIE
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