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Electric Vacuum Pen From Aquarium Air Pump.

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Step 2: Remove The Cover

First we will focus on the air pump.  We need it to suck in air, not pump it out.   We can easily reverse the valve in this pump. 

I got this pump for about $11 new.   You could probably do slightly better on ebay getting a used one, but sometimes we just want things now.

First start by turning the pump over and removing the four screws in the base.
 
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Is there some reason that just sticking the hose on the other hose bib wouldn't work, rather than opening it up to adjust the mechanism to pump the other direction?
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