|The brass rod and float ball came from Lowes.|
I drilled a 3/4" hole near the top of the rain barrel and screwed the valve in. Below are pictures from different angles.
1/2" barbed elbow to the threads of the float valve and attached the irrigation tubing that's connected to overflow barrel #2.
|This is a picture from barrel #3 showing how far away barrel #2 is. You can also get some sense of the elevation difference between the two barrels.|
bigger tub for the ducks.