Hi Jim,

You can check the plumbing pipes to see if they hold pressure without having the water turned on. Some people disconnect all the plumbing lines to toilets and sinks when they winterize a house so make sure these are all connected prior to turning on the water or you can have a big clean up on your hands.

Had one HUD house that was winterized unfortunately they winterized it after the pipes had already frozen and burst. had to replace the copper all the way up to the second floor.

Steve Reilly