Newbie question - Winterize or not

Theutzigs wrote:
I have already blown my lines out..

Does anyone see an issue with using winter windshield washer fluid for the P-Traps rather than Pink stuff?

I'm guessing here, isn't that what this forum generally is anyway :), since winter windshield fluid has a high percentage of methanol, I'm not sure if that would cause issues with P-traps or gray/black tanks. The toilet seal though, I would not use it as I would be concerned the seal would get dried out with continued use of windshield fluid. Yes, I realize you didn't mention the toilet just wanted to comment on it anyway. Not sure on the gray/black valves if they would be affected. Certainly, by the time the windshield fluid got to the gray/black tank valves it would probably be diluted.

RV pink antifreeze fluid is cheap stuff and I would just use it as it is already a known quantity. Just buy a couple of gallons at your local big box store to have it handy for when you need it.

Another thought... evaporation. It is possible the windshield fluid will evaporate a lot quicker then the pink stuff which will result in "sewer gas" entry into your cabin.