Originally Posted by BC1
Maybe I didn't explain it correctly - this has nothing to do with the actual bypass of the water heater when winterizing. I fully understand how that works. If you bypass the water how would the antifreeze get in the section of water lines that are outside the water heater and before the next closest water supply (which in my case is the city water fill). I'm not sure if it is ok to post a screenshot of the plumbing schematics from the Thor manual to show what I'm talking about.
So just to be clear, I am only asking how the antifreeze gets in the section of water lines before the water heater if you bypass it and the water heater is in a section of the plumbing where nothing else is after it.
When the water heater is isolated and drained, the short lines between the bypass and the water heater have no antifreeze in them.
Not an issue though... even if a little water remained in those lines, would have plenty of room to expand into the empty hot water heater...
Freezing alone isn’t an issue... freezing without room to expand (therefore cracking lines...) is the problem.
Does that answer it?