Okay, I will share my ugly secret about nipple waterers in brooders: I have the brooder box (Rubbermaid bin, 54 gallon size) up against a wall in my bathroom. I take one of those curved "Hercules Hooks" that you push into the wall and turn, as if I was going to hang a picture on the wall over the brooder.
I take an empty, hard plastic drinking water bottle, not the flimsy ones, but ones you buy in the Expensive Water section of the grocery, and drill two small holes on opposite sides of the bottle at the very bottom.
String poly cord or wire through those holes.
Install the poultry nipple IN THE BOTTLE CAP, then fill the bottle with water over the sink, because some will spurt/leak out of the drilled holes in the bottom of the bottle. Put the cap with the nipple on the bottle. Hang the bottle onto the Hercules Hook so it is far enough down into the brooder for the chicks to use.
The holes for the "hanger" cord or wire will serve as the vacuum break, and you can raise the bottle as the chicks grow.
The nipple should be just slightly ABOVE the shortest chick's head. They lift their heads to tap the metal "spigot" thingie.