[gunn55]

Originally Posted by Dentoid

Looks like you've done a good job on that plumbing, my concern is your main display overflowing. You have cut down on the drain twofold. First, you have plumbed two drains into one of the same diameter. Second, you have added a valve to the one drain line. If you cut back on the drain anymore your main display will overflow. Unless you can control the return pumps to match the drain rate. You would have much more control by plumbing a T into the return line with a valve going back to the fuge. I learned this from a RS friend-Woody! I'm sure you have this all figured out, just something to think about!

Ditto