Stereo where are you?
I should be able to get you a few lengths of the proper nipple drinker piping with nipples attached ready to go and a few spares.
They've been removed from a farm and may need a little TLC but should be decent enough.
They are used on broiler farms right from day old, each line is usually on a handwinch system and can be lifted or lowered as needed.
As Cloddopper says the nipple is usually adjusted in height so that the bird has to stretch just slightly to reach it.
Every morning it used to be three clicks on the handwinch
