I built a few of those for a hot tub several years ago.
Being a frugal and saving kind of guy, I've still got most
of them tucked away. Simple construction really and capable
of several inches of mercury.

John

On Mon, 19 Jan 2004 21:36:37 -0500, GeorgeB
wrote:

On Fri, 16 Jan 2004 08:41:07 -0800, Jim Weir wrote:

Does anybody have an idea on how to make a tiny little vacuum pump on the order
of an aquarium pump or so that will draw just a few inches of water? Preferably
110, but I can rig up a 12 volt supply if necessary.

Thoughts?

When I was in college, the chem labs used a venturi on water faucets
to create a vacuum for filtration. I've tried Google to show where to
get them, and failed.

Just a little attachment with a side barbed fitting ... good vacuum
levels, CHEAP, and appropriate for one who utilizes Bernoulli in other
ways ...

now where do I get it?