45 Degree Elbow:
Ok, so this is a bit on the optional side of things… If you want the cannon to point 45 degrees out by default don’t use this. If you want it to shoot straight up (I recommend for effect) then use this to correct the alignment. It will cost you about $1.50

Air Compressor Nipple :
So once we remove the hose from the tank we can install this 1/4th inch standard compressed air fitting to allow our quick connection fill hose to the tank. Again the harbor freight tank provides us with tremendous ease on this connection. This will cost you about $2.00
PVC Fittings:
So I wanted an easy to modify setup for my cannons barrel, so I chose to use PVC. It’s easy to replace and cheap to replace as well. Here we have some simple reducers and a connector piece used to join pipes together. We end up with a 1-1/4 diameter barrel on the cannon. You can adjust the length of PVC and air pressure to shoot a larger fireball. This will cost a minumum of $3.50
Teflon Tape:
Finaly we have a very important component to the build. Teflon tape provides us with 2 benefits. First it makes an air tight seal between our pipe fittings. Secondly it will help us easly disassyemble our fittings if needs be for maintainance. Don’t skip this $1.00 step
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