Put a 3 way tee on the back of the cannon in between the ballvalve and the back of the chamber, and tap in the gauge and schauder there.
for the shraeder valve put it in the back of the cleanout cap
Do not use a clean out cap, use a male and female adaptor and an endcap.
Clean out caps are not ...

Thats what I intended to do lol. I'm just nto sure on how to do it right.

The picture on top is what I am going to base my design off of. What i'm wanting to do is instead of using a blow gun to fill my cannon (like in the very top picture), is to be able to fill the cannon via schraeder valve. I would also like to have a pressure gauge installed as well. But if I ...

Hey guys, I'm brand enwe to the site and I've been trying to learn as much as possible lately. My plan is to build a cannon exactly like the one in this picture. http://i29.photobucket.com/albums/c283/scubasteve1808/exhaust.gif

But instead of using a blowgun to fill the cannon, I am wanting to add ...