OK, Here is my Auto Fill Kitty Litter Bucket Waterer.
https://www.backyardchickens.com/web/viewblog.php?id=48214-autofill-bucket-waterer
Total cost to me was about $20.00. What do you think?
(I put your images and text into a BYC page for you and added the link above) - Nifty-Chicken