I'm trying to finalize our coop design. I'm leaning towards using PVC pipe w/ horizontal nipples for water, but wondering what the downside is to this type of system. Is it hard to clean? Does it freeze easily? If so, is there a way to heat the system so that it doesn't freeze? Are 5-gallon buckets w/ nipples easier? Something else easier? We have a standard waterer from TSC in the brooder and they make a mess of it! Looking for cleaner alternatives for the coop. The chicks are a 4H project for my son, so I'd like a watering system that is fairly easy for him to refill, clean & monitor. (I'll supervise!) I'd also like something easy for the person watching the chickens when we are out of town. I'm located in the mountains of TN.