Take a look at the picture below. We have one of those cool 110 gallon Rubbermaid water buckets and ours has an automatic filler with a float valve (like a toilet). The hose we’re using to keep this bucket full is looking compromised so I haven’t been leaving the water on all day in the heat. The picture below was taken after a hot day with the waterer turned off. You can see the water line near the top of the bucket. Those two horses of ours sure drink a lot of water! Just a reminder to make sure those buckets are full each day.
BTW, we love this bucket and the waterer. I’ll write about it someday and include some other pictures.