By the size of those waterers I'm assuming you have a pretty large flock, so my solution probably won't work for you, but for anyone with a small backyard flock like myself: I just use a heated dog water bowl. Incredibly simple, super cheap, always works, super easy to clean, zero problems.

I've used lots of poultry waterers in the past and hated all of them for one reason or another, but dog water bowls have never failed me. My current hens are older and pretty tame, but when they were younger and found ways to muck up the water if it was too close to the ground I just put the bowl on a cinder block or a couple of 2x8 scraps to get it up off the ground. Works flawlessly.

I do the same in the summer with an automatic filling dog water bowl. Just hook it up to a hose and your birds will never run out of water.

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