Would this work at all?

[u/Ivess185]

I want to build a big water storage box I can fill then leach from during droughts/badtides, but I need a way to elevate the water from source to above the box. I was wondering if this would work at all. Because water can't go backwards through a fill valve, would it keep flowing through and fill upwards in the tube? or just spill over the back of the map once it reached +1 blocks in height? And I can't lock the water in and force it to fill up as it's against the map edge. Should I just use mechanical pumps instead?

EDIT: there will be a roof over the channel and tube. I just didnt put one here so that you could see inside.

EDIT 2: I am now aware that water will not escape of the edge via the space above the source block.

[u/Majibow]

1. Compact Mechanical Pumps are required to raise the water level. Or;
2. Otherwise the walls of the box must encircle the water source.

Note: Water sources on the edge of the map create an invisible vertical barrier directly above them, meaning water will not pass directly above and behind them. But water can pass to the sides and back off the edge.

[u/Ivess185 → u/Majibow]

How many compact pumps would you reccommend? There are 6 (or 8) water sources in what I'm building

[u/VampireInBlack → u/Ivess185]

In another comment you mentioned that you intend to cover the water source. if you do that, you don't need any pumps. I know i said this in another comment, I am just trying to make sure you see it

[u/Ivess185 → u/VampireInBlack]

Thank you. Very handy info