Quote Originally Posted by Brian_UK View Post
Different metals in the same water system can will generate the electrical charge needed to erode metals.

It is an unlikely thing to happens, but you never know.....
Hi,

If different metals is connected in the system and the cooling media enters to different circuits, it can be if the pH value of the water is in acidity range that results electrolysis.

But, we still need the results of the water analysis from 750 valve.

However, since the system is in condensation, some cooling media evaporates causing it the water to partly concentrated. then goes back to treatment circuit. We don't know what type of treatment they're doing but analysing to be like this, the probability of not maintaing the pH value to atleast 4-7 (alkaline) were likely a result of corossion and oxidation.