Vacuum is measured in inches of mercury. theoretical maximum is ~30 inches, only available in outer space. I think 14" mercury would be a little low, but others will chime in with a better number.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.