Having started with messy, open waterers for my flock, then moving to vertical nipples, I quickly saw the benefits of horizontal. The verticals were GREAT for keeping water clean but they had TWO major drawbacks that were non-starters for me: 1) they dripped...EVER so slowly but consistently when not in use. I despise wet bedding...an overabundance of moisture is what fuels just about EVERYthing micro and macro that can kill a chicken. 2) Even with a water heater in my bucket, the vertical nipples would often freeze. Not good for thirsty chooks.
The horizontal nipples solve both problems. They do NOT drip that slow, steady soaking nastiness that verticals do when not in use. They also do NOT freeze as easily by virtue of how they are designed. The heater in my 5-gallon bucket was more than enough to keep all 8 nipples clear through this last cold winter.
I would not go back to open waterers if I was paid to. The mess, the stagnation and the waterborne critters that love open, still water are all enough for me to swear it off. My closed horizontal nipple system (a cheap 5 gallon bucket with 8 nipples in it) means I only have to refill every 5 days, never need to clean filth out (poop, bedding, food, etc) and don't need to worry about it making a wet soppy mess of my bedding.
The ONLY time I will allow an open water source is on the stupid-hot, humid days where I want to ensure the chooks stay hydrated. I will often drop a few drops of NutriDrench or some sort of electrolyte in a bowl of water with some ice cubes for them somewhere in the pasture so they don't have to go back to the coop to drink. They ALWAYS act like they are dying of thirst when I do it as they make a big fuss (they think it's a treat!) and drain the water quickly. It's a good way to get them any waterborne meds/suppliments/vitamins/wormers as they go whole-hog on the occasional bowl of water.
I got my horizontal nipples off of
ebay. There appear to be at least two reputable sellers...
195319531 and
allboutchickens. I got mine from the former. Nipple systems can be as complex or simple as folks want/need. I opted for simple and it doesn't get much more simple than a $2 5-gallon bucket (and a drill-bit) resting on top of some cinder blocks so I could adjust the height as the chooks grew.