Quote:
Originally Posted by Gary-Alberta
Although I really can't understand how any water couldbe left in the black tank flush line, should flow both ways out from the high point, I did just go out to my rig and run antifreeze through it, "just in case".
It gets real cold here before I head down to Arizona in January.
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The way they run the line from the valve will cause water to be trapped between the tank and part way to the valve. Unless someone has dropped the coroplast and tied up the line, it will be laying on top of the coroplast and then leads back up to the spray fitting at the front of the tank. In the photo, the line connects to the tank and then just lays down until it gets back to where it goes up to the valve, and water will stay trapped there.