Found the answer on the tubing:
The door system would not work as the upstate NY cold weather hardened the plastic tubing.
I went to TSC and bought 10' of 3/8" ID EPDM Rubber Spray hose ($9.99) with a temp range -20 to 190. Has been working flawlessly!
Rainer
This is a great idea which I have adopted to our own coop with a couple of minor modifications such as shut off switches and lights, but otherwise pretty original to yours - TY for the idea!
Question - when temps are below 10 degrees, all works fine except the plastic tubing running between...
NYCue,
I would be interested in the pulley system internally - in the box, a wheel is turned left and right by the water containers. Internally, what is your transfer mechanism toward the door?
That would help me as I would love to copy your invention.
Rainer
I would have to agree with that. Although VERY green at chickens, I had a long History of reef keeping. The pumps do not run dry. The larger more powerful ones will die due to overheating if the load is low, but the smaller as OP used work forever this way. In one of my projects I actually...