Vacuum on gravity

[Z/MAN]

I paid attention to the posts on here about setting up tubing to get natural vacuum with only gravity. I installed 20 taps on 5/16 lateral line, about a 200 ft run and a drop of about 30 feet. Today was the first really good run I had since tapping and I have been holding 9 inches of vacuum!:o This run seems to be matching if not out performing my other line which has 30 taps on a mainline. I might be removing the mainline and retubing next year!!!!
Paul

5516