Great set up ...however I would think we would have some small issues with this waterer -
1) This system would hold a couple gallons of water in an environment that would welcome algae. This is in turn would require you to break down the system, dump the water, and scrub clean the bucket. This would take 15 min or more.
2) I personally don't like large pools of water like this 'holding' in a containment system. The reason here is that it invites parasites and other microorganisms (bacteria) that could cause problems. In addition dirt and trash will accommodate in this system and will require cleaning. The water system that hold 2 to 5 gallons of water have an advantage here in that the water is rotated.
The system I posted has the advantage in that it holds at any time a couple of teaspoons of water. If you want to clean it you can just wipe your figure down in the cup and drag out the foreign objects....or you could simple twist off the cups and wipe it clean with a rag and re-install. Either can be done in less than a minute and their is no large heavy volumes of water that you have to dump or containers to scrub free of algae. In addition - the water 'rotates' quickly and fresh water is on demand. I would estimate that the water is 'rotated' two or three times a day - depending on your flock size.
I like keeping water in a contained environment (concealed inside the PVC pipe under/above ground) until I actually need it. I just don't like large pools of water like this because it requires too much labor to clean and invites the problems I mentioned above.
Further - I like a clean environment, and I stress the need to keep pens clean and dry....probably cleaner than most pens out there. I find that my system helps me keep a clean environment
One last thing on a water system being labor intensive - the system that I posted above can be cleaned/managed by someone that does not physically have the ability to manage tugging on heavy buckets of water (1 gallon of water weights a little less than 10 lbs). I probably spend less than 5 minutes in just over a month on watering 10 pens. I have a low pressure water gauge monitoring my system - and simply put - if I have 3 - 5 lbs of water pressure - my turkeys/chickens have water and there is no need to enter the pen.
However - if your system works in your application ...GREAT! But if you ever was to try the watering system that I sell - you would be sold.
Take care,
Richard