Originally Posted by lamato
HI, we've had our 2013 extended interstate 1 year. We just returned from a two month trip. Twice during our trip we experienced 14 degree and 19 degree temperatures at night. On both occasions we noticed a drip coming from the hose between the macerator and the auto drip. It also appeared that the black tank drained the first time this happened. The dripping occasions were two weeks apart. The time between the "leaks" everything seemed to work perfectly when the temperatures did not go below freezing...there was no dripping. We made a video of the dripping if anyone is interested in viewing, I will try to post,it.
The "auto drip"? That's not terminology I'm familiar with.
Consider, even when you use the tank heaters to keep the fresh tank and holding tanks from freezing, the hoses between the holding tanks and the macerator pump aren't heated, the macerator pump isn't heated, and neither is the discharge hose. You need to make sure those are empty.
One key is, the discharge hose is coiled vertically on the reel, meaning there are low points in each loop that can trap water. When you dump your holding tanks, you need to pull out all 20 feet of the hose and lay it out flat on the ground, even if the dump station is only 3 feet away. That way, as you reel up the hose again, all of the residual water in the hose will run out the end of the hose.