Water stagnant in pipes though it could exit

This is actually just how the piping system works currently (which frustrated the heck out of me as well my last playthrough).  Essentially you have water coming in from the left and right over that shower.  The pipes currently don't seem to actually use pressure mechanics and instead work more like conveyor belts.  As such when this situation happens, it deadlocks the system.

It would be nice if piped contents that have been deadlocked for a while would at least try recalculate to see if there is somewhere they could go.

All those recalculations would cost a lot of CPU. Also, there would be new deadlocks since every second a new blob can enter the system. There are different speed of input and output and different matter size for them too. (theres a reason most of the games tries to skip on the liquid distribution  )

4 hours ago, Blas88 said:

All those recalculations would cost a lot of CPU. Also, there would be new deadlocks since every second a new blob can enter the system. There are different speed of input and output and different matter size for them too. (theres a reason most of the games tries to skip on the liquid distribution  )

You wouldn't need to recalculate constantly, just a periodic check to scan for deadlocks.  The path should also utilize a pathfinder to make sure that flow is always going from input -> output.  So that these sort of deadlocks don't happen either (would abstract a sort of pressure concept that way at least).

Yes, I think you're right, it does look like a conveyor belt system. But since the devs have a pretty awesome gas flow physics system, I'm assuming this does kind of count as a bug

You have 2 inputs, and 4 outputs. They are jamming each other up.

... I can see that, but that's not how water pipes work in reality. It's not an actual conveyor belt. For example, the heating in my house has several radiators and one heater. The pipes to the radiators have one input and many outputs, and the system back to the radiator has many inputs and one output. Works like a charm.