The efficiency of the exchange of liquids and gases through hatches, ports, pumps is very low! Example:�

There is a tank with a volume of 80 thousand liters. There is a vacuum in it. And three hatches - that is, three holes measuring 0.75 by 0.75 meters.�

How fast do you think the tank should fill if it is placed in water? A thousand liters per second? Tens of thousands of liters per second? Inside, I remind you, there is a VACUUM!�

And in the game, the filling rate of such a tank is 150 liters per second. The same thing will happen if you install ports, and it doesn't matter what shape and size.�

More. The system of communicating vessels stops working (liquids stop equalizing) if hatches are placed on top. You can not even open them, in the game it will already break the communicating vessels. BUT if you remove the hatches, then miraculously the liquids will equalize! Although actually they shouldn't!�

Also, water is very poorly squeezed out by air. That's how everything worked on the release, and now at least pump 200 atmospheres - the water will come out at a rate of 5 liters per second.