- Grand California 600
On the Grand California 600 2021 model the valve opens in cold weather (3 degrees and less) and drains the water. That I can understand as it stops any freezing in the pipes. What I cannot fathom is how to stop ALL the water from draining from the fresh water tank. Surely there should be anther way of stopping this, otherwise when you are camping and need water in the morning for washing etc there isn't any? Also the heating won't work or am I mistaken?