I am in the process of getting my solar panel system up and running. I have purchased a pair of 2x20 sun grabber's to go with the pair that were laying in the yard waiting to be put on the roof. I also purchased a Goldline GL235 control assembly. Attached is a diagram of what I have in mind, 1st will it work and do you see any thing that you would do different? I wrote on the bottom of the page that I might put two more valves to the right of the 3-way valve and to the right of the cross. Also I plan on having a vacum breaker on top as well as drains where they go up to the roof. I will remove the panels from the roof in the fall, to make them last longer and I may remove the valve system, that is why I have unions on all branches of it.