I made a couple of waters for my chicken barn that cost very little so I thought I'd share. I ran 1/2 inch PVC pipe the length of what I needed to water. Where every pen was, I glued a T fitting. Then to the T fitting I glued a threaded end piece. To the threaded end I screwed on a threaded nipple from a landscape watering system - $1.97 each ( black), which I had applied the landscape water tubing, I think it's a 1/4 inch wide. Then I ran each piece of tubing into the water dishes or soda/milk bottles and the other end I attached to a control knob to turn on and off the water. Later I will hook up a auto timer. I have it running to the Barn, to all my outside pens, with different controls for each pen- all in one area. I can stand in one place and water everyone in 10 min. If I don't want to buy the landscape tubing nipple and go cheaper, I get a 1/2 inch PVC end cap, drill a hole slightly smaller than the landscape tubing, push tubing through the hole and pull it in w/ pliers (cut tubing end at angle to make it go easier) then glue it to the T connectors. Works like a charm. This waters both sides of my Barn. Each side has it's own turn valve to allow water in the pipe. The Black Cones are Landscape water connectors for attaching to a hose. The Black tubing is the 1/4 landscape tubing. I used a 1/2 inch threaded end that fitted the Black Cones to connect, that way if one getts plugged up w/ debris you can unscrew it and clean it.. This is a cheaper version w/o using the Black Cones, just use PVC end caps and drill a hole slightly smaller than the Landscape tubing. I also use this w/o the tubing and extend the PVC neck that goes to the end cap, drill the hole and put in through the top hole of a Milk Jug.