Hello all, I am looking for a system to install that will also function well if we are away for a couple of weeks. My neighbors will be checking the girls every other day, if not every day. For the sake of the hens, the neighbors, and myself, I want a system that will keep the water clean! I've seen a cup system on McMurray Hatchery site that has 2 cups and claims to provide for up to 25 hens!!??? Then there is the Chicken Fountain. I"m not sure if that can be gravity fed. I have not had good luck getting pvc lined up exactly using primer and cement, so I don't want to do this myself! The bucket waterers that I can make don't hold enough water! Any advice would be greatly appreciated!