axial flow water pump

very easy pump to print, no support needed only small parts.
i used a 1 meter m8 thread, for every propeller you need 4 nuts, my pump transports the water 80 cm high, but maybe with more stages you can get higher.
you need a diffuser otherwise the water starts spinning around, and does not gets transported.

The drill i used does 2000 rpm, if you go lower in the rpm the pump probably wont perform that good.

i used a 50mm pvc pipe with a wall thicknesser of 2,5 mm if your pvc pipe is thicker you can use a smaller size propeller ( there are 4 sizes )

Print the propeller with the numbers up for better result.

also have a look at my other designs ( more pumps )

you can find the video of the pump on YouTube with this link

https://youtu.be/QQgOWI-2kDM