Dear OldNick:

"OldNick" wrote in message
...
On Sat, 22 Sep 2007 10:55:52 -0500, Brian Whatcott
wrote stuff
and I replied:

But what is the cheap source of getting the vacuum?
I figured there had to be a vacuum, although it was
not said. But how do you get it?

Fill the tubes, with a small air bubble in between. Lift the
tube at the bubble. No small feat if you are looking to make
hundreds of gallons per day, but a one-shot expense...

David A. Smith