jalichty wrote:
If you drain the tanks, why put anything in them? Even if the small amount of water left in the tanks freezes, it would seem to me there is plenty of space for the small amount of ice to expand without harming anything. I have never put any antifreeze or pink antifreeze in my tanks in 21 years and, to the best of my knowledge, haven't had a problem. Help me understand if I have a problem.
It does not matter if the tanks freeze with a small amount of liquid in them, true there is plenty of room for expansion. Draining them IMO is not good on the knife valve seals. It is best to keep some amount of liquid in them. I prefer they do not freeze and use rv antifreeze in them.