Jim Felder wrote:
> At one time someone posted a link that described the connection and use of a
> manifold gauge. Could anyone point me to that?

You could go to Harbor Freight's offering of A/C manifold gauge set and
download the product manual (it's in green below where you "Add to cart".

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92649

Mike