When i try to pump anything out of the vat, the pump does its animation, the liquid looks like it flows through pipes, but it doesnt fill any fluid tanks or basins connected to the pipes. If i place it directly in front of the pump, yes it works, but if i run it through pipes, the mixture stays in the vat.

I tried with different liquids. I remember that I used mercury, water, and some random mixture I had in that vat. It didn't work with either of them

Then, when i break and reassemble the vat, it suddenly works fine

@Andromeda-Galaxy29 When nothing was coming out, what did your Vat contain?