I have 6 4*12 used Heliocol panels to mount on my garage roof, 3 facing west and 3 facing east. The north side also has a small pitched roof. Below that is the 8' wall.
I apologize in advance for my graphics skills, but I hope you can understand the layout.
I intend to run up the side of the garage, over to each cold inlet. Then join the 2 hot outlets at the center peak, down the north roof, then down the wall to the pool return, all with 2" sched 40 pvc.
You can see where the vacuum relief valve and winter drains are planned. All this is subject to the knowledgeable people on this forum. All thoughts are greatly appreciated!