Parallel Pipeline: Pressure Flow Direction?

[Domagoj]

If we have a main pipe and it branches to 3 new pipes, but those 3 pipes don't connect back. Let's say that the pressure in the main pipe is 100psi (water wants to move to the right through 3 additional pipes) and the pressure at the end of each of three other pipes is 50 psi (water wants to go to the left toward the main pipe). Can we know which way the water will flow?

 

[jbriggs444]

In horizontal pipes (i.e. ignoring gravity), water will accelerate from a high pressure region toward a low pressure region.