This 3-5V 3W Pump is a Small size liquid pump but very strong which can eject the water for 1m far, low consumption, and high efficiency. Multi-purpose. Can be used as a water suction pump, vacuum pump.
These pumps move fluid using a rotating mechanism that creates a vacuum which captures and draws in the liquid, Advantages: Rotary pumps are very efficient for fish tank water changes, experimental models, inflatable small pool, tea machine, grain oil pumping station, car scrub, etc.
the pump is polarised, you can try with some water to see if it eject it.
the pump doesn't work inside water you need to use a pipe, not submersible.
when running the pump for a too long a time there should be load(water or other fluid), or the pump will get damaged.
Not designed for continuous working under load or no load you should let it cool.