I wanted the build to have two return pumps. I also decided to have one pump run a few pieces of equipment and the other run other equipment. I also wanted to have the ability to have one pump run on both sides in case something happens to the other. The drawing, well, the drawings took some time but in the end, was easier than expected. We wanted to add color but I came up with the idea to have one pump be one color and the other pump be a different color. Plus, the drain was totally different.
The red side will be running the display tank and one other such as reactor or two. On the end, I also have a ball valve if I ever decide to add more. The blue will be running the UV, located on the back and pumps back into the sump just behind the protein skimmer, and runn a few more pieces of equipment...such as chiller or Ca reactor or both. All the returns are 1" pvc piping. There are three 1.5" return drains. I will say...the tank is loud. Something I found at Lowes, was the hangers you see on the left side of the ball valves. Turned out to be really nice. If you want a picture of the hangers, I can always posted it.
Here is the back side of the tank,
I know, there is a blue 90 degree elbow...we did not have another red one and wanted to get the tank running. The overflow drains have been changed to help make the tank little more quite.