Winterizing In the South

I'm in NC about 30 min west of Durham and chapel hill. I empty my tanks and run the pink stuff through the lines. I also put a little water mixed with pink stuff in black tank just to keep that little bit of water from freezing. If we take the trailer out, we simply open the faucets and capture the pink stuff back into the jugs or empty milk cartons so we can use it again at the end of the trip. One of my coworkers had pipes burst in her trailer when she didn't run the pink stuff through it. she also had a soda bottle explode one winter when she forgot to take it out for the winter. She also taught me to pull all of my toiletries because freezing temps change the constitution of some of the liquid soaps, shampoos and toothpaste. Now we have totes that we put everything into for the winter and it stays in our spare closet until spring.