I order them off of Amazon. It’s called a little giant automatic poultry fount. It’s not a float it has a valve like a tire valve. It refills as the birds drink it. I ordered a pack of replacement valves as well. They do have some bad reviews online about overflowing but I really think people might not know how to adjust them correctly . It takes some adjusting to get them just right but once you figure it out they work flawless. I’ve had mine for a little over a year and have never had any problems and havent even had to replace the valve yet. You do want it in the shade and it can’t sit on the ground it has to hang to work. It doesn’t get any algae buildup cause it’s not holding much water in. But I dump it out and clean it with my hand let it rinse out and refill usually once a day. Only takes a few seconds that’s it. I love mine! No more filling up waters everyday