I'm behind just stopping by. Did you figure out the leaky nipples? I've use Teflon tape on mine and also a 21/32 drill bit. Never had one leak. Now I use the horizontal nipples. No leaks what so ever where as the chickens would bump the vertical ones and cause them to leak water
How do the horizontal one's work in the winter subzero temps with birdbath heater in bucket? I hear the vertical ones you just hold your hand on for a few seconds and they thaw out. I don't know if I will like these vertical one's dripping down on their faces when they drink and it's zero out....or twenty below....