Quote Originally Posted by DaveO View Post
If automotive antifreeze is not recommended, how is RV antifreeze different? Is it used in an rv for something other than cooling the engine? (Preventing drains from freezing...?)
Auto antifreeze will kill you very painfully while RV antifreeze generally will not. RV antifreze used to be an ingredient in DR. Pepper in the "good old days". It is used to freeze proof the potable water systems in an RV for off season storage.

Thurmond