Most use just distilled with some sort of pump lube. I've heard that redline water wetter will gum up a radiator in no time. Stay away. Use RMI 25 instead.
who here had the EVANS NPG+ installed. Besides a good flush what else is needed? I looked at the site and they talked about removing the thermistat and changing a pulley!!!! Besides that all the old water had to be flushed out completely.
The Atlas Backflush machine reverse-flows & cleans your entire coolant system.
Then, to empty out the residual water from block,
we use a 6.5 hp electric blower (230 mph) attached to the upper rad hose, pushing everything out the lower water pump hose.
If you wish to lower your rad cap pressure, or put in a new thermostat, that's your option, & there's no better time.