¡Look at (and READ) the pink stuff jug!
On the advice of a friend that used to be a product engineer for a major OE chemical supplier, I have started reading the jugs of RV anti-freeze that I have. The old ones were straight Propylene ...
Forum Discussion
I always used the blow out method and I still believe it's the best option available. I used the anti-freeze the first year I owned an RV and I will never do that again. To much time, too much effort and absolutely no gain over simply blowing the water out of your system and putting a bit of anti-freeze in the traps and pumps to ensure safe storage.
