Having first hand experience with frozen air lines, I have been trying to figure things out. I believe a check valve is a good idea although I didn't have the foresight to install one.

That being said, I don't believe water in the line will freeze while under water. It will freeze when it reaches the ice or the frozen ground. My air line, I'm asumming, has frozen because it was locked into the suface ice. I didn't weight the air line when I installed the system, now I'm paying the price.

Thanks to the help I recieved from the forum, I've been able to clear the line without to much trouble.

Last edited by scruffy_fish; 01/01/10 05:41 PM.