One of my vacuum pumps for small jobs, was made
from the compressor off an old refrigerator.
It's a 110v compressor. An AC compressor would work
but i'm Scared of 220v.

It sucks the air out of a Beer-keg, and has a one
way valve in line to keep the vacuum in the keg.

Add a valve and an adjustable Hg switch and Ya got something that
can pull almost a full atmosphere and only run for
5 minutes every hour if Ya got a good tight seal on
the bag.