A Treasure of Free Homemade Gold Prospecting Equipment Plans and Commentary: Hand Vacuum Pumps

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Thursday, December 06, 2012

Hand Vacuum Pumps

This is interesting. I haven't tried building one, and don't know if you could use it to pump into a bucket for hand dredging, but the instructions are good. The author claims he can do it for less than $20 by using a bicycle pump.
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