1st check if main water valve seals , does not leak...or back into
house ,, Drain everything , and hot water tank , clothes washer may '
hold water" always , contact mnfg. use RV or appropriate antifreeze
Everywhere there is standing water even Floor traps and Basement Traps..
Basicly you want to remove ALL WATER , whatever is left is treated
with antifreeze..... good luck, if you need more help contact me,
also contact your ins co for what is covered,
Ive heard of several people who have had mains leak and did not
prepair for it , plan ahead , good research and luck