[Piping] Water not flowing through

My water gets pulled to the water filtration, however, it only gets pulled into water filtration and nothing comes out. 

 

I have found that the game really dislikes when you run a pipe directly over an inlet/outlet port. try branching the inlets and outlets so its not directly connected to the main pipe.
so basically:

    |____[  ]_|                         |              |
              ll        instead of      |____[  ]_|
>=========>                    >======ll==>  

Having a bit of a buffer to my pipes has solved most if not all of my pipe issues thus far.

OMG, thank you so much Trollsamaa, saved my entire colony <3 <3 <3