From looking at your diagram, I'm thinking with three different sized containers all in the same one, that you could drill a hole into the first bin and put a bulkhead in it with a down spout and gate valve, then have the same in the second bin flowing into the third.
That way you can control your water levels to the other bins, and not allow it to overflow if the event of a power outage.
What kind of overflow are you using?
|