Thanks for the answers! So with longer lever and gears you could move the switch. But now that I think of it, if you have the second motor for moving the switch, you can also use it for a second pump and have two separate lines? Inspired from msk6003's video, I tested connecting cylinders directly to each other. They work utilizing over- and underpressure, but that action seems quite stringy. But you could transfer movement in both directions with one motor that way. And by using springs.
Do you know if that switch requires as much force?