I Love your product!! The girls love it to! They instinctively knew right away what they were and how to drink from them.
 
Here are some pics of how I installed the water system. We live in NW North Carolina in the mountains. Winter can get pretty cold here so I added heat tape to the 4' PVC pipe water tank and built it into the chicken tractor. The tank holds about 2.6 gallons. This will give some aux heat to the upper section and also help to keep the water from freezing in really cold weather. The heat tape turns on if the temp drops below 35 deg F and turns off at 45 deg F.
 
The tank feeds the 3/4" PVC pipe (3 ports) in the lower section and has 3 ports in the bottom of the tank as well. I could add heat tape to the lower section or just turn off the water valve to that section in winter and let them drink upstairs.
 
Thanks again for a great product and great service!