I'm harvesting rainwater with this kind of device:
The same shop was also selling a rather expensive, clear, wide (maybe a diameter of 4cm) (like 200€+ for 25m) hose designed to work with it.
So instead of buying it, I decided to give it a try with what I had already: a cheap 13mm/15mm green, opaque garden hose.
The cistern where the water is flowing to is lower than the collection point, but still it doesn't work. I would like to know why.
Meanwhile, I kinda solved the problem by adding a 120L barrel just next to the collection point, and I drilled a hole and put a tap at the bottom of this barrel and plugged the 13mm hose in it. So as long as this barrel is filling slower than it is emptying, the problem is solved. I think it's rather unlikely that one day it will rain so much that it will fill faster than it can handle it.
So is it because of the air trapped inside the hose that the water won't enter in it ?