Steven Shelikoff wrote:

Why? Did you find somewhere that says an absolute zero/zero vacuum is
0.0049 psi?

I just made it up. Why don't you look it up and tell us, tell us
anything except -14.7 psi.

This thread is turning into a "How many angels can dance ..." argument
where you guys can't even define and angel.

This stuff isn't rocket science. To expand on Rod's contribution, the
real metrics are available, the standards used throughout the world and
their definitions are readily available to those who prefer to speak the
language of science and technology rather than technical pig latin.

All you accomplish by saying -14 psi is to sound very very ignorant of
how pressure is measured and its standard conversions.

Rick