Holy Smokes....talk about a screwey way to plumb things!
Brine from the water
maker is even more corrosive than normal sea water with it's concentrated salt
content. I would get rid of that set-up Pronto!
Regarding the water maker brine.
The two common ways to plumb it overboard
. Thr first is with an above the water line plastic through hull
. The second and most common in the installations we do is to tie the brine discharge into a galley
sink or head
sink drain. This way you have one less hole in the boat.
For the CU200 water cooling.
I would run the system without the water cooling circut even hooked up and save yourself the amp draw and maintenance
headache of adding water cooling to the unit.