[dcarch]

Here is an idea for someone to try out. A True self-watering system without valves or electric gadgets.
I hope the diagrams are self explanatory.

The concept is to have the weight of the container to allow/cut-off water into the container and the bungee cords (or springs) can be adjusted periodically to compensate for the increasing weight of the plant(s).

You will need to play with the location of the tube restrictor closer or further away from the hinges and the strength of the bungee cords to make it work, depending on your water pressure and size of the container.

The watering tube probably should be UV vinyl or some long lasting rubber.

This idea will eliminate the need for the reservoir, so you can use a smaller container. A drain hole will be needed to prevent rainwater over flow.

I have not tried to make this to test how it works because I don't have the room for EBs, but earl made me post this.
Let me know what you think.
It's Earl's Fault if your plants die.

dcarch