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An aquarium air pump also works as a vacuum pump. It pulls a higher vacuum than a shop vac, quieter, and more convenient. I use one for photoresist vacuum bagging in a 12” x 12” bag and I would recommend it over a shop vac.
http://www.instructables.com/id/Vacuum-Pump-from-Aquarium-Air-Pump/
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Monday, July 24, 2017 9:31 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] Attaching two PCBs together
You really want to use a shop vac for that kind of work! Shop vacs have separate fans to keep the motor cooled while it's running - household vacs don't; they rely on the air flow thru the hose for motor cooling.
Adhesive squeeze out shouldn't be much of a problem with a polyethylene bag; they're almost impossible to glue anything to.
Roy