If you have a 24 pound relief cap on your distilled water system, and a bit of glycol and a teaspoon of dishwashing detergent,  There is no point in going to a higher boiling temp. If you boil that mixture, you have overheated and or lost the engine and need to be on the ground. If the overflow hose from the catch tank (not the pressurized bottle) sticks up through the cowl where you can see it, you will be the first to know that something dreadful has happened.

 

Lynn E. Hanover

 You right as usual, Lynn.  I'll  stop - promise!{:>)

 

Ed