Hey Bo it sounds like your shooting for the same set up I have. I have a ten run dog kennel with each run being four foot wide. I ran 1/2 inch PVC on top and have a T going down every other run. Then I bought some lixit faucet waterers for dogs. It works great you dont have to worry about cleaning nasty bowls. The dogs havent chewed on the PVC at all but I did put insulation on them and they like chewing on that. This will be my first winter with this system so I will probably drain the pipes and start hand watering during the freezing weather. Hope this helps, I will try to take some pictures and give you a better idea how its set up.
I recommend putting insulation on the top run because if you dont the water gets pretty hot in the summer, the dogs figure out pretty quick how the lixits work, just make sure you flush the system when you first install it because the water will taste like PVC glue
I found that out when my wife told me to try it out and it was nasty. ha ha
