homemade vacuum pump + air pump from junk fridge

[shogun]

Or if you want to built one, recycle an old refrigerator into a homemade vacuum pump and air pump http://www.motherearthnews.com/diy/homemade-vacuum-pump-zmaz81jfzraw.aspx

[bimmer nut]

Cool, thanks for sharing.

[whiskychaser]

Very interesting article. Not sure if Mother Earth News would recommend discharging refrigerants to the atmosphere these days :-) You are in for a surprise if you try removing items from a recycling depot here without asking - it can be regarded as theft