Yes, I also have a separate drain hose to drain the fresh water tank. I'm just wondering if the low point drain will drain the fresh water tank as well. We left our 5th wheel up at camp last weekend and it's been getting down into the 20's at night. I wanted to drain the lines but not the fresh water tank. When I opened the low point drains, and the pump was shut off, the cold water drain drained for about 5 minutes before I shut it off. My thinking was that it shouldn't take that long to drain the low point drain so maybe there was water coming out of the fresh water tank as well.