ideas for a 3/4" chamber

[victorjung]

Hi guys, since today i always used aluminium bottle as chamber in my pneumatic canon like this one: http://www.francismountain.com/boutique ... 2550-z.jpg
But it's not a erfect 3/4" npt so it 's not perfect proof and now i want something perfectly proof so i need a chamber with a real 3/4" connection. or a 1" i could use a reducer. so do you have any idea? something in metal will be more appreciated!

[pneumaticcannons]

Sorry, I don't quite understand what you mean by "perfectly proof". You were trying to say perfectly right? Could you Please spesify... Darn language barrier

[victorjung]

yeah i'm sorry for my poor english. But yes perfectly proof mean that the under pressure air in the chamber stay in it. so perfectly proof means proof !

[cannon monkey]

im still confused bout the perfectly proof but why not use iron pipes? just saying

[Crna Legija]

Perfectly air proof or air tight is how you should say it. If you use epoxy you can defiantly get it to hold air, that's how i did it for my fire extinguisher. You can also use pipe and fittings sold in hardware stores

[victorjung]

Pipes are heavy and don't offer big volume... What's the size of the thread in an extinguisher? is it all the time the same?

[microman171]

I would suggest a 3/4" pipe nipple, and then you cover the thread in epoxy, and screw the pipe nipple in.