Timsec 2 Pack 1/2 Inch Float Ball Valve, Adjustable Arm for Livestock Water Trough, Aquariums, Hydroponics - Automatic Fill and Control Water Level

These worked well, I use them for hydroponics, to set the level for Kratky system. Note the float valve should be in an auxillary bucket or resovoir to the buckets with plants; otherwise plant growth will interfere with the valve.

Very happy

I use these as auto levelers for my koi pond. They don’t “flow” water. It’s more of a gentle spray, which I like; I think it makes it much easier to manage too and less likely to break.

Merveilleux le bonheur... manque jamais d'eau et toujours fraîche wow liberté facile à installé

The one unit tested wouldn't fully shut off