Fluid issues in coal plant

I am aware this issue has probably been discussed a million times, but I'm having problems with my coal plant. I am running 16 generators with (I think) enough water to supply them all. However, despite splitting the generators in 2 manifolds, I am unable to deliver enough water to the farther away generators, and they keep shutting down.

I am relatively new to this game, and this is my second coal plant and most ambitious project so far.

Here are the screenshots: