I helped make an automatic nipple waterer. I'm not sure about all of the parts. I was just helping with the construction of it. It has toilet plumbing in it to keep filling the bucket up. I connected the waterer under my house via PVC. I'm not sure if this is exactly what you were looking for, but it works well for me. You could also use different kinds of nipples. Check out this page for types of nipples: https://www.amazon.com/s?k=chicken+nipples&ref=nb_sb_noss_2
Maybe you could find a correctly sized hose adapter for the plumbing?