Winterizing a water system is extremely easy with a small compressor like this available at Harbor Freight.
http://www.harborfreight.com/air-too...sor-60637.html
I hook mine up to the outside sillcock/garden hose connection. It blows all the lines in the house, no disconnecting anything. Just run the washer and dishwasher momentarily to get the water out of the supply lines then pink anti freeze all the drains, traps and toilets as others have described above. Piece of cake.
BT