!!!!!!!!! THIS BUGREORT IS OUTDATED !!!!!!!!!! I think i found what is causing the bug. I made a new bugreport 7 posts above (infinitely spawning, of 100°C hot dirt).
The pump would suck it up and send it to the Wather Purifier were it gets deleted becaues it's normal water.
I alsow included the save file: Heat.sav
The bug seems to be caused by invinit faling dirt with is hot AF
There are new, over 100°C hot dirt chunks spawning all the time.
Pumping contaminated water out of an air-tight room. (probably works with any liquid)