Step 7: Set it up and see if it sucks...

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KDS44441 year ago

Um... What about the "pump" part? You showed several brass attachments and you mention a garden hose, but there's no pump here anywhere or am I missing something? Because a vacuum chamber without a pump is just a pretty tube.

WillN1 KDS44446 months ago

The "pump" part is the flow of water through the nozzle. Air is sucked out of the chamber by the Venturi effect: http://en.wikipedia.org/wiki/Venturi_effect

Also see Bernoulli's principle: http://en.wikipedia.org/wiki/Bernoulli%27s_princip...

Nyxius4 years ago
I usually us a shop vac, milk crate, and garbage bag to degas my silicone, but yours looks pretty good.
meyotch4 years ago
Yay! It sucks! Just kidding! (or *am* I?)

Great instructable. I happen to have a lovely glass bell jar without the vacuum base. I need a vacuum source about once a year for one of my projects and now I am inspired to build a base and make it whole once more.