I just bought the screw in nipples from dmrippy here on byc, drill the holes in the bottom of 2 or 5 gallon buckets and screw them in. If the holes are drilled straight and the nipples screwed in straight and tight there usually isn't a leak. Then hang the buckets up; set the lid on top loosely (these won't work if you seal the lid and there is a vacuum) You can always put an ice bottle in the bucket in the summer. I use the little two gallon ones in my breeding pens and a five gallon in the layer houseI'm so jealous of people's watering systems. I just have a large dish bucket that in the summer gets frozen water bottles and a spot in the shade. I have unsuccessfully tried building a nipple waterer a few times. I don't know what I do wrong but the joint glue never stays with the weight of the water in it. I'm not very familiar with ways to glue pvc but I have used a combo primer and water proof pvc cement and let it dry 2 days but as soon as I hang it and turn the hose on to fill it it bends at the joint and breaks. I think perhaps I use too large of a PVC pipe. I may purchase one of the premade cooler/nipple combos like the BriteTap one. http://www.chickenwaterer.com/BriteTap-Automatic-Chicken-Waterer-p/bt100.htm