Hi,
The advice I'd give is keep it simple!
When I built my
mobile chook house, I installed a really fancy system with a header tank, and the nipples mounted on the bottom of a slanting plastic pipe. The idea behind this was that as the chicks grew, they'd use progressively higher and higher nipples.
Frankly that didn't work!

Firstly I had a hell of a job getting the red plastic nipples (really cheap from Ebay BTW) to seal onto round 2" pipe. Secondly the birds tended just to peck at the nipples at eye level, which over time flooded the floor.
In the end, I took an empty mineral lick bucket (they grow in the hedges round here) and drilled some holes in the bottom. The nipples screwed in and sealed onto the flat surface without any issue, and it was really easy to tell how much water was left, and to refill.
I keep thinking I should come up with something fancier, but it works fine, with no hassle or mess. Even older birds seem to take to them very quickly. You just have to make sure the nipples are above head height so they have to stretch up to drink.
HTH!