I was thinking a standard Jandy 3-way valve that I would just use as a blend valve. Common plastic ball valves don't seem to last too well.

Also, I do plan to use 2" line on the equipment pad between all components. I'll use bushing as the pipes come out of the ground to get to 2". I will have about 2 ft to the pump entrance, so thats not a problem.

The biggest mechanical problem I see with attaching the two lines together is that they are not in nice positions for connecting together. Trying to minimize elbows will be a challenge.