[NH_Bulldog]

If you blow the air out of the lines first, antifreeze isn’t even really necessary. We use the antifreeze on the odd chance some water remains in the system. Any potential dilution is negligible at best.

I am not doing it to save money, it’s just a method I have used for decades on my RV’s and at our seasonal camp deep in the North Woods. In aggregate, it costs me no more than a few extra minutes on the winterizing end, but saves me at least an hour and tons of water on the de-winterizing end. We are on well water and we have no eco-friendly way to drain and flush and dispose of used antifreeze “non-toxic” or not. As others have done, I simply shared a method I use and that has worked for me since the 1990’s without a single damaged plumbing line, fitting or appliance.