[rotorwrench]

The point is that you can't have your cake and eat it too. It's never has been practical to run straight water. H2O has no lubricant capability by itself and it boils at a relatively low temperature. It also will freeze rather quickly in subfreezing weather. Then there is the corrosion problem.

A person can run Water Wetter with H2O and maybe slow the corrosion problem. I'm not sure how well it works with the pumps. It won't keep it from freezing. A 50/50 mix of good old antifreeze does it all and even increases the boiling point a small amount but at least it helps with the corrosion better.

You can run straight water but it has to be serviced for cold weather so that would mean servicing it twice a year in colder climates. It freezes here in south TX several times during the cold season so there aren't too many parts of the country you can use it without adding anti freeze and changing it out for summer.