Halloween Props
http://www.shutterfly.com/lightbox/view.sfly?fid=3f29910a893e77a36cbbd47cbb382743#1335578031292
Fright props 120 volt 1/2" solenoid =$60
Craftsman 5 gal air tank=$30.00
Misc. fittings=$10 (1/2" floor trap was bought at homedepot)
I didn't use 1/2" brass nipples because it reduces the inside...