rainwater collection system, water pump, and water tank, what to do?

[Speaty]

I want to do some purified waters for food/drinks and ice cubes...
I know it have to do with"rainwater collection system, water pump, and water tank" or am mistaken!

so, how to do purified waters?

thanks

[Bandisto]

osmoze purify i guess

[mpstar]

Big water pump > small water pump > water filter > water tank

Rain water collector > water filter > water tank

You don't need a small pump for rain water if you use gravity. Same for the filter > tank pipe.

[Eminem]

https://www.youtube.com/watch?v=MaqE5EGZBtw

[Speaty]

ok, am trying to figure things out...
I just put water pump on a wall, as I must... I connect it with a generator as wire and water tank as pipe...
so , how it function now? am trying to press 'F' but nothing happen!

btw, thanks for your help