This Is All About Getting The Water Out Of The Pipes So They Don't Freeze.
Water left in pipes and appliances will freeze if the heat is not kept running in the winter time.
There are several areas of concern here. First you need to get the water out of the water pipes. Frozen water in these pipes will expand and break the pipes.
Next there is the drainage system. There is water in the traps and you don't want it to freeze either.
Then you have to deal with the appliances, the dishwasher, washing machine and such.
This video shows you how to winterize your house or cottage – have a look see.