Hoping for some help. New TT this year 2021 Freedom Express Liberty Edition. Having trouble dewinterizing. In the past with my old Cherokee I just had to turn on water pump and flush out antifreeze. This camper I am having water flowing out of my city water spigot on the outside of my camper. I was also having it flow out of both low point drains but I figured out I needed to cap those. My old TT had valves to turn off so that threw me for a minute. What am I missing with this water coming out of the city water when the pump is on??