Winterization: wet or dry?

WyoTraveler wrote:

There are Rvers still out there that don't think that pink stuff freezes. It just doesn't freeze hard enough to damage lines. Unless it gets diluted in the lines. Plus winterizing and de-winterizing 5 or 6 times a year and getting the pink stuff out at 30 or 35 degrees is almost impossible.

Oh, I know only too well.

To those who think that pink juice is best in the fresh water lines, I tell them to take a cup full of it and place it in their freezer at home and watch what happens over the next few days. Household freezers typically don't get as cold as it can outside in the dead of winter, yet you can still turn a glass of pink juice into ice. No thanks. Not for my water lines.

On the other hand, there is anti-freeze that boaters commonly use which has protection down to -150. Even though I wouldn't personally put that in my water lines, that would be a much better option than the el cheapo -50 stuff they sell as RV anti-freeze. If the -50 stuff gets even slightly diluted with latent water remaining in the lines, it's level of protection is drastically reduced.