Float Valve

 Looking to get float valves shipped to your door? Jump to the bottom of the article for our recommendations.

Have you seen “the most useless machine in the world?”

When you turn it on, a little arm pops out to turn itself off again. It’s the funniest feat of human engineering so far.

But not all devices that exist to switch themselves off are “useless.” A float valve is one great example.

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