Here is the post I was talking about
http://www.canreef.com/vbulletin/showthread.php?t=63871
the orange boxes are the solenoids
Only thing im not sure is if I need 3 because I believe the RO/DI will stop water after it feels pressure because of the solenoids stopping and me having a stop valve.
I should know soon as the parts for my RO/DI got in today!