The pump can pump the liquid, gas, and particles in the back to front (yellow side).
When the blocks pressure difference between the outlet and the inlet is not more than 500, the pump can operate without electricity.
When the blocks pressure in the outlet direction is greater than 500 in the direction of the inlet, the pump will consume 0.02 u/pa of electricity.
When the pump exits with a liquid or gas block in the direction of the outlet, the block is compressed and the pressure is increased.
The pump can also pump the air pressure until the pressure at the inlet becomes zero.
The pump also has the same function as the cargo hold block and can be used as a cargo bulkhead.