Best alternative to RV antifreeze.
We're trying to get an early start heading out west this year in April. We're going the South route out and North route back so we will experience some freezing snowy weather for sure. A mix of 50/50 ...
Forum Discussion
Chris Bryant wrote:
Rock Salt.
x2 on this. Obviously you don't want to use rock salt (or even table salt, which is purer) in your fresh water system, but it's perfectly reasonable for the gray or black water tanks. It will, at least eventually, all dissolve away so not build up crud in the tanks, and it's fairly environmentally friendly, and it doesn't attack rubber seals etc.
Incidentally, the anti-freezing compound in windshield washer fluid (that fluid that is suitable for cold weather use--some formulations are not) is generally ethanol (wood alcohol), which can be somewhat nasty stuff. You certainly do not wan to drink it! Apparently it also attacks some rubber and similar compounds over time, though I don't know if it specifically causes trouble for typical RV sewer valve seals.
