Well, let's shitloads of different types of "float valves".
The basics::: There's going to be a line/level, where the 'float' will go from OFF all the way to ON.

You need to place that line/level exactly where you want it. Where do you want it? Depends on your setup/system. The float valve will mantain the fluid levels up to the line/level you designated. I think it'd be best to put your float valve on the more or less same height as your grow buckets, but have your res higher (3 or 4 feet higher)... so it gets the aid of gravity.

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-turtle420
turtle420 Reviewed by turtle420 on . Float Valve Help Could someone teach me about float valves and setting up a control bucket? Pretty much all I know is what I see in the toilet. I know how it works I just don't know the specifics like how exactly to use it in a control bucket. If anyone could open up their control buckets and take me a few pics I'd greatly appreciate it. Once I learn how to build me a control bucket, and a get a little big of cash, I can start growing my own hydroponics farm :D. Thanks in advance anyone. Rating: 5